/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/combinations/Problem05_label46+token_ring.07.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:47:49,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:47:49,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:47:49,305 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 07:47:49,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 07:47:49,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 07:47:49,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 07:47:49,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 07:47:49,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 07:47:49,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 07:47:49,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 07:47:49,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 07:47:49,311 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:47:49,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:47:49,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:47:49,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:47:49,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:47:49,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:47:49,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:47:49,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:47:49,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:47:49,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:47:49,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:47:49,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:47:49,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 07:47:49,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 07:47:49,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 07:47:49,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 07:47:49,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 07:47:49,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 07:47:49,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 07:47:49,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 07:47:49,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 07:47:49,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:47:49,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:47:49,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:47:49,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 07:47:49,373 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:47:49,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:47:49,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:47:49,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:47:49,374 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:47:49,374 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:47:49,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:47:49,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:47:49,377 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:47:49,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:47:49,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:47:49,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:47:49,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:47:49,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:47:49,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:47:49,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:47:49,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:47:49,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:47:49,380 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:47:49,380 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:47:49,380 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:47:49,380 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:47:49,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:47:49,380 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:47:49,381 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:47:49,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:47:49,593 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:47:49,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:47:49,595 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:47:49,601 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:47:49,602 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/Problem05_label46+token_ring.07.cil-2.c [2022-01-10 07:47:49,646 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2cf8b1c/6a72cdbf7d1c4d1888cd93a4ddfabc7c/FLAG0e00227d9 [2022-01-10 07:47:50,330 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:47:50,330 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/Problem05_label46+token_ring.07.cil-2.c [2022-01-10 07:47:50,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2cf8b1c/6a72cdbf7d1c4d1888cd93a4ddfabc7c/FLAG0e00227d9 [2022-01-10 07:47:50,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f2cf8b1c/6a72cdbf7d1c4d1888cd93a4ddfabc7c [2022-01-10 07:47:50,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:47:50,397 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:47:50,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:47:50,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:47:50,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:47:50,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:47:50" (1/1) ... [2022-01-10 07:47:50,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12c71282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:50, skipping insertion in model container [2022-01-10 07:47:50,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:47:50" (1/1) ... [2022-01-10 07:47:50,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:47:50,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:47:51,831 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/Problem05_label46+token_ring.07.cil-2.c[382357,382370] [2022-01-10 07:47:51,849 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/Problem05_label46+token_ring.07.cil-2.c[383339,383352] [2022-01-10 07:47:52,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:47:52,014 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:47:52,624 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/Problem05_label46+token_ring.07.cil-2.c[382357,382370] [2022-01-10 07:47:52,627 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/Problem05_label46+token_ring.07.cil-2.c[383339,383352] [2022-01-10 07:47:52,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:47:52,689 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:47:52,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52 WrapperNode [2022-01-10 07:47:52,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:47:52,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:47:52,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:47:52,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:47:52,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:52,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:53,089 INFO L137 Inliner]: procedures = 59, calls = 63, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 12881 [2022-01-10 07:47:53,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:47:53,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:47:53,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:47:53,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:47:53,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:53,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:53,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:53,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:53,361 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:53,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:53,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:53,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:47:53,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:47:53,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:47:53,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:47:53,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (1/1) ... [2022-01-10 07:47:53,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:47:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:47:53,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 07:47:53,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 07:47:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:47:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-01-10 07:47:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-01-10 07:47:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 07:47:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 07:47:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-01-10 07:47:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-01-10 07:47:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:47:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-01-10 07:47:53,524 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-01-10 07:47:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-01-10 07:47:53,524 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-01-10 07:47:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-01-10 07:47:53,524 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-01-10 07:47:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-01-10 07:47:53,524 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-01-10 07:47:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:47:53,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:47:53,636 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:47:53,637 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:48:00,078 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:48:00,101 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:48:00,101 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2022-01-10 07:48:00,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:48:00 BoogieIcfgContainer [2022-01-10 07:48:00,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:48:00,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:48:00,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:48:00,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:48:00,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:47:50" (1/3) ... [2022-01-10 07:48:00,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7409ac9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:48:00, skipping insertion in model container [2022-01-10 07:48:00,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:47:52" (2/3) ... [2022-01-10 07:48:00,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7409ac9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:48:00, skipping insertion in model container [2022-01-10 07:48:00,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:48:00" (3/3) ... [2022-01-10 07:48:00,110 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.07.cil-2.c [2022-01-10 07:48:00,113 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:48:00,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 07:48:00,149 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:48:00,153 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 07:48:00,153 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 07:48:00,191 INFO L276 IsEmpty]: Start isEmpty. Operand has 2448 states, 2415 states have (on average 1.850103519668737) internal successors, (4468), 2420 states have internal predecessors, (4468), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-10 07:48:00,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:00,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:00,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:00,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:00,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:00,210 INFO L85 PathProgramCache]: Analyzing trace with hash -818812197, now seen corresponding path program 1 times [2022-01-10 07:48:00,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:00,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1601207744] [2022-01-10 07:48:00,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:00,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:00,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:00,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:00,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 07:48:00,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:00,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:48:00,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:00,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:00,621 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:00,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1601207744] [2022-01-10 07:48:00,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1601207744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:00,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:00,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:48:00,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279196037] [2022-01-10 07:48:00,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:00,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:48:00,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:00,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:48:00,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:00,661 INFO L87 Difference]: Start difference. First operand has 2448 states, 2415 states have (on average 1.850103519668737) internal successors, (4468), 2420 states have internal predecessors, (4468), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:00,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:00,823 INFO L93 Difference]: Finished difference Result 4883 states and 9005 transitions. [2022-01-10 07:48:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:48:00,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:00,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:00,840 INFO L225 Difference]: With dead ends: 4883 [2022-01-10 07:48:00,841 INFO L226 Difference]: Without dead ends: 2380 [2022-01-10 07:48:00,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:00,849 INFO L933 BasicCegarLoop]: 4427 mSDtfsCounter, 392 mSDsluCounter, 4022 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 8449 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:00,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 8449 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2022-01-10 07:48:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2380. [2022-01-10 07:48:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2349 states have (on average 1.8369518944231589) internal successors, (4315), 2352 states have internal predecessors, (4315), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-10 07:48:00,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 4359 transitions. [2022-01-10 07:48:00,952 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 4359 transitions. Word has length 124 [2022-01-10 07:48:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:00,953 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 4359 transitions. [2022-01-10 07:48:00,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 4359 transitions. [2022-01-10 07:48:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:00,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:00,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:00,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:01,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:01,167 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:01,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:01,169 INFO L85 PathProgramCache]: Analyzing trace with hash 219772377, now seen corresponding path program 1 times [2022-01-10 07:48:01,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:01,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578409204] [2022-01-10 07:48:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:01,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:01,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:01,171 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:01,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 07:48:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:01,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:01,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:01,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:01,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578409204] [2022-01-10 07:48:01,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578409204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:01,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:01,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:01,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857203605] [2022-01-10 07:48:01,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:01,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:01,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:01,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:01,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:01,511 INFO L87 Difference]: Start difference. First operand 2380 states and 4359 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:01,982 INFO L93 Difference]: Finished difference Result 2896 states and 5171 transitions. [2022-01-10 07:48:01,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:48:01,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:01,993 INFO L225 Difference]: With dead ends: 2896 [2022-01-10 07:48:01,993 INFO L226 Difference]: Without dead ends: 2652 [2022-01-10 07:48:01,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:01,998 INFO L933 BasicCegarLoop]: 4389 mSDtfsCounter, 4694 mSDsluCounter, 8706 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 13095 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:01,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4709 Valid, 13095 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 07:48:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2022-01-10 07:48:02,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2631. [2022-01-10 07:48:02,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2577 states have (on average 1.8145129996119518) internal successors, (4676), 2581 states have internal predecessors, (4676), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 07:48:02,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 4753 transitions. [2022-01-10 07:48:02,071 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 4753 transitions. Word has length 124 [2022-01-10 07:48:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:02,071 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 4753 transitions. [2022-01-10 07:48:02,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:02,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 4753 transitions. [2022-01-10 07:48:02,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:02,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:02,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:02,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:02,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:02,281 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:02,281 INFO L85 PathProgramCache]: Analyzing trace with hash -797876011, now seen corresponding path program 1 times [2022-01-10 07:48:02,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:02,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [240447257] [2022-01-10 07:48:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:02,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:02,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:02,284 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:02,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 07:48:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:02,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:02,576 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [240447257] [2022-01-10 07:48:02,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [240447257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:02,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:02,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:02,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580559674] [2022-01-10 07:48:02,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:02,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:02,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:02,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:02,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:02,582 INFO L87 Difference]: Start difference. First operand 2631 states and 4753 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:02,866 INFO L93 Difference]: Finished difference Result 3126 states and 5531 transitions. [2022-01-10 07:48:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:48:02,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:02,875 INFO L225 Difference]: With dead ends: 3126 [2022-01-10 07:48:02,876 INFO L226 Difference]: Without dead ends: 2631 [2022-01-10 07:48:02,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:02,879 INFO L933 BasicCegarLoop]: 4332 mSDtfsCounter, 4484 mSDsluCounter, 8349 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4499 SdHoareTripleChecker+Valid, 12681 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:02,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4499 Valid, 12681 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-01-10 07:48:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2631. [2022-01-10 07:48:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2577 states have (on average 1.8117966627861855) internal successors, (4669), 2581 states have internal predecessors, (4669), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 07:48:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 4746 transitions. [2022-01-10 07:48:03,044 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 4746 transitions. Word has length 124 [2022-01-10 07:48:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:03,044 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 4746 transitions. [2022-01-10 07:48:03,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 4746 transitions. [2022-01-10 07:48:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:03,046 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:03,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:03,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:03,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:03,255 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:03,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1523440039, now seen corresponding path program 1 times [2022-01-10 07:48:03,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:03,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337009598] [2022-01-10 07:48:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:03,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:03,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:03,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 07:48:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:03,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:03,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:03,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:03,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:03,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337009598] [2022-01-10 07:48:03,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337009598] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:03,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:03,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:03,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431990317] [2022-01-10 07:48:03,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:03,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:03,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:03,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:03,556 INFO L87 Difference]: Start difference. First operand 2631 states and 4746 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:03,819 INFO L93 Difference]: Finished difference Result 3126 states and 5517 transitions. [2022-01-10 07:48:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:48:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:03,828 INFO L225 Difference]: With dead ends: 3126 [2022-01-10 07:48:03,829 INFO L226 Difference]: Without dead ends: 2631 [2022-01-10 07:48:03,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:03,831 INFO L933 BasicCegarLoop]: 4329 mSDtfsCounter, 4478 mSDsluCounter, 8345 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4493 SdHoareTripleChecker+Valid, 12674 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:03,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4493 Valid, 12674 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-01-10 07:48:03,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2631. [2022-01-10 07:48:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2577 states have (on average 1.8090803259604191) internal successors, (4662), 2581 states have internal predecessors, (4662), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 07:48:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 4739 transitions. [2022-01-10 07:48:03,889 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 4739 transitions. Word has length 124 [2022-01-10 07:48:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:03,889 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 4739 transitions. [2022-01-10 07:48:03,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 4739 transitions. [2022-01-10 07:48:03,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:03,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:03,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:03,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:04,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:04,098 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:04,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1916837973, now seen corresponding path program 1 times [2022-01-10 07:48:04,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:04,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [231248902] [2022-01-10 07:48:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:04,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:04,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:04,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:04,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 07:48:04,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:04,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:04,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:04,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [231248902] [2022-01-10 07:48:04,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [231248902] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:04,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:04,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:04,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697294501] [2022-01-10 07:48:04,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:04,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:04,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:04,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:04,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:04,352 INFO L87 Difference]: Start difference. First operand 2631 states and 4739 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:04,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:04,607 INFO L93 Difference]: Finished difference Result 3126 states and 5503 transitions. [2022-01-10 07:48:04,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:48:04,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:04,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:04,617 INFO L225 Difference]: With dead ends: 3126 [2022-01-10 07:48:04,617 INFO L226 Difference]: Without dead ends: 2631 [2022-01-10 07:48:04,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:04,619 INFO L933 BasicCegarLoop]: 4326 mSDtfsCounter, 4472 mSDsluCounter, 8341 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4487 SdHoareTripleChecker+Valid, 12667 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:04,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4487 Valid, 12667 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:04,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-01-10 07:48:04,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2631. [2022-01-10 07:48:04,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2577 states have (on average 1.8063639891346528) internal successors, (4655), 2581 states have internal predecessors, (4655), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 07:48:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 4732 transitions. [2022-01-10 07:48:04,678 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 4732 transitions. Word has length 124 [2022-01-10 07:48:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:04,679 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 4732 transitions. [2022-01-10 07:48:04,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 4732 transitions. [2022-01-10 07:48:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:04,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:04,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:04,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:04,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:04,888 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:04,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash -188942631, now seen corresponding path program 1 times [2022-01-10 07:48:04,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:04,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925184959] [2022-01-10 07:48:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:04,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:04,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:04,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:04,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 07:48:05,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:05,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:05,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:05,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:05,205 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:05,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925184959] [2022-01-10 07:48:05,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925184959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:05,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:05,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:05,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719009556] [2022-01-10 07:48:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:05,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:05,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:05,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:05,207 INFO L87 Difference]: Start difference. First operand 2631 states and 4732 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:05,458 INFO L93 Difference]: Finished difference Result 3126 states and 5489 transitions. [2022-01-10 07:48:05,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:48:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:05,467 INFO L225 Difference]: With dead ends: 3126 [2022-01-10 07:48:05,467 INFO L226 Difference]: Without dead ends: 2631 [2022-01-10 07:48:05,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:05,470 INFO L933 BasicCegarLoop]: 4323 mSDtfsCounter, 4466 mSDsluCounter, 8337 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4481 SdHoareTripleChecker+Valid, 12660 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:05,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4481 Valid, 12660 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-01-10 07:48:05,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2631. [2022-01-10 07:48:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2577 states have (on average 1.8036476523088862) internal successors, (4648), 2581 states have internal predecessors, (4648), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 07:48:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 4725 transitions. [2022-01-10 07:48:05,540 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 4725 transitions. Word has length 124 [2022-01-10 07:48:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:05,540 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 4725 transitions. [2022-01-10 07:48:05,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 4725 transitions. [2022-01-10 07:48:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:05,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:05,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:05,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:05,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:05,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:05,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:05,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1780891691, now seen corresponding path program 1 times [2022-01-10 07:48:05,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:05,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [269779933] [2022-01-10 07:48:05,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:05,756 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:05,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:05,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:05,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 07:48:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:05,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:05,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:06,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:06,024 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:06,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [269779933] [2022-01-10 07:48:06,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [269779933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:06,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:06,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:06,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896319167] [2022-01-10 07:48:06,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:06,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:06,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:06,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:06,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:06,026 INFO L87 Difference]: Start difference. First operand 2631 states and 4725 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:06,274 INFO L93 Difference]: Finished difference Result 3126 states and 5475 transitions. [2022-01-10 07:48:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:48:06,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:06,285 INFO L225 Difference]: With dead ends: 3126 [2022-01-10 07:48:06,285 INFO L226 Difference]: Without dead ends: 2631 [2022-01-10 07:48:06,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:06,289 INFO L933 BasicCegarLoop]: 4320 mSDtfsCounter, 4460 mSDsluCounter, 8333 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4475 SdHoareTripleChecker+Valid, 12653 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:06,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4475 Valid, 12653 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-01-10 07:48:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2631. [2022-01-10 07:48:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2577 states have (on average 1.80093131548312) internal successors, (4641), 2581 states have internal predecessors, (4641), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 07:48:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 4718 transitions. [2022-01-10 07:48:06,348 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 4718 transitions. Word has length 124 [2022-01-10 07:48:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:06,349 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 4718 transitions. [2022-01-10 07:48:06,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 4718 transitions. [2022-01-10 07:48:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:06,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:06,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:06,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:06,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:06,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1908533081, now seen corresponding path program 1 times [2022-01-10 07:48:06,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:06,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743773359] [2022-01-10 07:48:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:06,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:06,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:06,561 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:06,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 07:48:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:06,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:06,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:06,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:06,813 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:06,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743773359] [2022-01-10 07:48:06,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743773359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:06,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:06,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:06,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804878174] [2022-01-10 07:48:06,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:06,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:06,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:06,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:06,814 INFO L87 Difference]: Start difference. First operand 2631 states and 4718 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:07,042 INFO L93 Difference]: Finished difference Result 3126 states and 5461 transitions. [2022-01-10 07:48:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:48:07,042 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:07,050 INFO L225 Difference]: With dead ends: 3126 [2022-01-10 07:48:07,050 INFO L226 Difference]: Without dead ends: 2631 [2022-01-10 07:48:07,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:07,052 INFO L933 BasicCegarLoop]: 4317 mSDtfsCounter, 4453 mSDsluCounter, 8329 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4468 SdHoareTripleChecker+Valid, 12646 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:07,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4468 Valid, 12646 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-01-10 07:48:07,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2631. [2022-01-10 07:48:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2577 states have (on average 1.7982149786573536) internal successors, (4634), 2581 states have internal predecessors, (4634), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-01-10 07:48:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 4711 transitions. [2022-01-10 07:48:07,157 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 4711 transitions. Word has length 124 [2022-01-10 07:48:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:07,157 INFO L470 AbstractCegarLoop]: Abstraction has 2631 states and 4711 transitions. [2022-01-10 07:48:07,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 4711 transitions. [2022-01-10 07:48:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:07,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:07,158 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:07,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:07,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:07,366 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:07,367 INFO L85 PathProgramCache]: Analyzing trace with hash 30810077, now seen corresponding path program 1 times [2022-01-10 07:48:07,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:07,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977102710] [2022-01-10 07:48:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:07,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:07,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:07,368 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:07,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 07:48:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:07,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:07,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:07,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:07,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977102710] [2022-01-10 07:48:07,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977102710] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:07,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:07,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:07,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265098030] [2022-01-10 07:48:07,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:07,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:07,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:07,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:07,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:07,601 INFO L87 Difference]: Start difference. First operand 2631 states and 4711 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:07,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:07,929 INFO L93 Difference]: Finished difference Result 3248 states and 5635 transitions. [2022-01-10 07:48:07,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:07,938 INFO L225 Difference]: With dead ends: 3248 [2022-01-10 07:48:07,938 INFO L226 Difference]: Without dead ends: 2753 [2022-01-10 07:48:07,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:07,940 INFO L933 BasicCegarLoop]: 4314 mSDtfsCounter, 4523 mSDsluCounter, 8324 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4538 SdHoareTripleChecker+Valid, 12638 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:07,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4538 Valid, 12638 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:48:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2022-01-10 07:48:07,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2753. [2022-01-10 07:48:07,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2693 states have (on average 1.7783141477905682) internal successors, (4789), 2697 states have internal predecessors, (4789), 41 states have call successors, (41), 17 states have call predecessors, (41), 17 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-01-10 07:48:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 4870 transitions. [2022-01-10 07:48:07,991 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 4870 transitions. Word has length 124 [2022-01-10 07:48:07,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:07,991 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 4870 transitions. [2022-01-10 07:48:07,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 4870 transitions. [2022-01-10 07:48:07,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:07,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:07,992 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:08,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:08,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:08,200 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:08,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:08,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1463145928, now seen corresponding path program 1 times [2022-01-10 07:48:08,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:08,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969816803] [2022-01-10 07:48:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:08,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:08,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:08,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 07:48:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:08,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:08,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:08,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:08,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969816803] [2022-01-10 07:48:08,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969816803] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:08,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:08,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:08,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514605958] [2022-01-10 07:48:08,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:08,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:08,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:08,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:08,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:08,460 INFO L87 Difference]: Start difference. First operand 2753 states and 4870 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:08,788 INFO L93 Difference]: Finished difference Result 3492 states and 5953 transitions. [2022-01-10 07:48:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:08,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:08,796 INFO L225 Difference]: With dead ends: 3492 [2022-01-10 07:48:08,797 INFO L226 Difference]: Without dead ends: 2875 [2022-01-10 07:48:08,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:08,800 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 4516 mSDsluCounter, 8320 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4531 SdHoareTripleChecker+Valid, 12632 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:08,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4531 Valid, 12632 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:48:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2022-01-10 07:48:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2875. [2022-01-10 07:48:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 2809 states have (on average 1.758632965468138) internal successors, (4940), 2813 states have internal predecessors, (4940), 43 states have call successors, (43), 21 states have call predecessors, (43), 21 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-01-10 07:48:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 5025 transitions. [2022-01-10 07:48:08,859 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 5025 transitions. Word has length 124 [2022-01-10 07:48:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:08,859 INFO L470 AbstractCegarLoop]: Abstraction has 2875 states and 5025 transitions. [2022-01-10 07:48:08,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 5025 transitions. [2022-01-10 07:48:08,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:08,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:08,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:08,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:09,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:09,068 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:09,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2061153212, now seen corresponding path program 1 times [2022-01-10 07:48:09,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:09,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844835974] [2022-01-10 07:48:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:09,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:09,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:09,070 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:09,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 07:48:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:09,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:09,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:09,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:09,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:09,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844835974] [2022-01-10 07:48:09,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844835974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:09,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:09,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:09,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318243079] [2022-01-10 07:48:09,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:09,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:09,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:09,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:09,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:09,311 INFO L87 Difference]: Start difference. First operand 2875 states and 5025 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:09,628 INFO L93 Difference]: Finished difference Result 3736 states and 6263 transitions. [2022-01-10 07:48:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:09,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:09,637 INFO L225 Difference]: With dead ends: 3736 [2022-01-10 07:48:09,637 INFO L226 Difference]: Without dead ends: 2997 [2022-01-10 07:48:09,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:09,640 INFO L933 BasicCegarLoop]: 4307 mSDtfsCounter, 4510 mSDsluCounter, 8316 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4525 SdHoareTripleChecker+Valid, 12623 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:09,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4525 Valid, 12623 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:48:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2022-01-10 07:48:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 2997. [2022-01-10 07:48:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2925 states have (on average 1.7391452991452991) internal successors, (5087), 2929 states have internal predecessors, (5087), 45 states have call successors, (45), 25 states have call predecessors, (45), 25 states have return successors, (44), 43 states have call predecessors, (44), 43 states have call successors, (44) [2022-01-10 07:48:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 5176 transitions. [2022-01-10 07:48:09,700 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 5176 transitions. Word has length 124 [2022-01-10 07:48:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:09,700 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 5176 transitions. [2022-01-10 07:48:09,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 5176 transitions. [2022-01-10 07:48:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:09,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:09,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:09,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:09,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:09,908 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:09,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1561386089, now seen corresponding path program 1 times [2022-01-10 07:48:09,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:09,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107953739] [2022-01-10 07:48:09,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:09,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:09,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:09,910 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:09,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-01-10 07:48:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:09,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:09,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:10,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:10,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:10,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107953739] [2022-01-10 07:48:10,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107953739] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:10,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:10,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:10,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692812190] [2022-01-10 07:48:10,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:10,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:10,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:10,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:10,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:10,155 INFO L87 Difference]: Start difference. First operand 2997 states and 5176 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:10,478 INFO L93 Difference]: Finished difference Result 3980 states and 6565 transitions. [2022-01-10 07:48:10,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:10,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:10,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:10,498 INFO L225 Difference]: With dead ends: 3980 [2022-01-10 07:48:10,499 INFO L226 Difference]: Without dead ends: 3119 [2022-01-10 07:48:10,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:10,501 INFO L933 BasicCegarLoop]: 4304 mSDtfsCounter, 4503 mSDsluCounter, 8312 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4518 SdHoareTripleChecker+Valid, 12616 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:10,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4518 Valid, 12616 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:48:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2022-01-10 07:48:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 3119. [2022-01-10 07:48:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3119 states, 3041 states have (on average 1.7198290036172312) internal successors, (5230), 3045 states have internal predecessors, (5230), 47 states have call successors, (47), 29 states have call predecessors, (47), 29 states have return successors, (46), 45 states have call predecessors, (46), 45 states have call successors, (46) [2022-01-10 07:48:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 5323 transitions. [2022-01-10 07:48:10,566 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 5323 transitions. Word has length 124 [2022-01-10 07:48:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:10,566 INFO L470 AbstractCegarLoop]: Abstraction has 3119 states and 5323 transitions. [2022-01-10 07:48:10,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 5323 transitions. [2022-01-10 07:48:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:10,567 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:10,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:10,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:10,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:10,775 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1768360762, now seen corresponding path program 1 times [2022-01-10 07:48:10,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:10,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002311445] [2022-01-10 07:48:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:10,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:10,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:10,777 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:10,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-01-10 07:48:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:10,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:10,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:11,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:11,024 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:11,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002311445] [2022-01-10 07:48:11,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002311445] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:11,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:11,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:11,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204040902] [2022-01-10 07:48:11,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:11,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:11,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:11,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:11,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:11,025 INFO L87 Difference]: Start difference. First operand 3119 states and 5323 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:11,378 INFO L93 Difference]: Finished difference Result 4224 states and 6859 transitions. [2022-01-10 07:48:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:11,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:11,386 INFO L225 Difference]: With dead ends: 4224 [2022-01-10 07:48:11,386 INFO L226 Difference]: Without dead ends: 3241 [2022-01-10 07:48:11,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:11,389 INFO L933 BasicCegarLoop]: 4301 mSDtfsCounter, 4496 mSDsluCounter, 8308 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4511 SdHoareTripleChecker+Valid, 12609 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:11,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4511 Valid, 12609 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:48:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2022-01-10 07:48:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 3241. [2022-01-10 07:48:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3241 states, 3157 states have (on average 1.7006651884700665) internal successors, (5369), 3161 states have internal predecessors, (5369), 49 states have call successors, (49), 33 states have call predecessors, (49), 33 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 07:48:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 5466 transitions. [2022-01-10 07:48:11,454 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 5466 transitions. Word has length 124 [2022-01-10 07:48:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:11,456 INFO L470 AbstractCegarLoop]: Abstraction has 3241 states and 5466 transitions. [2022-01-10 07:48:11,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 5466 transitions. [2022-01-10 07:48:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:11,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:11,457 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:11,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:11,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:11,664 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:11,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:11,665 INFO L85 PathProgramCache]: Analyzing trace with hash 15372342, now seen corresponding path program 1 times [2022-01-10 07:48:11,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:11,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78906604] [2022-01-10 07:48:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:11,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:11,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:11,666 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:11,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-01-10 07:48:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:11,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:11,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:11,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:11,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78906604] [2022-01-10 07:48:11,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78906604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:11,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:11,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:11,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752135595] [2022-01-10 07:48:11,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:11,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:11,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:11,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:11,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:11,905 INFO L87 Difference]: Start difference. First operand 3241 states and 5466 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:12,244 INFO L93 Difference]: Finished difference Result 4468 states and 7145 transitions. [2022-01-10 07:48:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:12,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:12,251 INFO L225 Difference]: With dead ends: 4468 [2022-01-10 07:48:12,251 INFO L226 Difference]: Without dead ends: 3363 [2022-01-10 07:48:12,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:12,254 INFO L933 BasicCegarLoop]: 4298 mSDtfsCounter, 4489 mSDsluCounter, 8304 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 12602 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:12,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4504 Valid, 12602 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:48:12,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2022-01-10 07:48:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3363. [2022-01-10 07:48:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3273 states have (on average 1.6816376413076688) internal successors, (5504), 3277 states have internal predecessors, (5504), 51 states have call successors, (51), 37 states have call predecessors, (51), 37 states have return successors, (50), 49 states have call predecessors, (50), 49 states have call successors, (50) [2022-01-10 07:48:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 5605 transitions. [2022-01-10 07:48:12,319 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 5605 transitions. Word has length 124 [2022-01-10 07:48:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:12,319 INFO L470 AbstractCegarLoop]: Abstraction has 3363 states and 5605 transitions. [2022-01-10 07:48:12,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:12,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 5605 transitions. [2022-01-10 07:48:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:12,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:12,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:12,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 07:48:12,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:12,528 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1629142873, now seen corresponding path program 1 times [2022-01-10 07:48:12,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:12,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085027260] [2022-01-10 07:48:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:12,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:12,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:12,530 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:12,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-01-10 07:48:12,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:12,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:12,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:12,742 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:12,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085027260] [2022-01-10 07:48:12,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085027260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:12,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:12,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:12,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360638954] [2022-01-10 07:48:12,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:12,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:12,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:12,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:12,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:12,744 INFO L87 Difference]: Start difference. First operand 3363 states and 5605 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:13,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:13,081 INFO L93 Difference]: Finished difference Result 4712 states and 7423 transitions. [2022-01-10 07:48:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:13,088 INFO L225 Difference]: With dead ends: 4712 [2022-01-10 07:48:13,088 INFO L226 Difference]: Without dead ends: 3485 [2022-01-10 07:48:13,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 07:48:13,091 INFO L933 BasicCegarLoop]: 4295 mSDtfsCounter, 4481 mSDsluCounter, 8300 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4496 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:13,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4496 Valid, 12595 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:48:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2022-01-10 07:48:13,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 3485. [2022-01-10 07:48:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3485 states, 3389 states have (on average 1.6627323694305105) internal successors, (5635), 3393 states have internal predecessors, (5635), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 07:48:13,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3485 states to 3485 states and 5740 transitions. [2022-01-10 07:48:13,164 INFO L78 Accepts]: Start accepts. Automaton has 3485 states and 5740 transitions. Word has length 124 [2022-01-10 07:48:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:13,165 INFO L470 AbstractCegarLoop]: Abstraction has 3485 states and 5740 transitions. [2022-01-10 07:48:13,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:13,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3485 states and 5740 transitions. [2022-01-10 07:48:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:13,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:13,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:13,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-01-10 07:48:13,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:13,374 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:13,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:13,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1163840004, now seen corresponding path program 1 times [2022-01-10 07:48:13,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:13,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859170211] [2022-01-10 07:48:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:13,375 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:13,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:13,376 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:13,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-01-10 07:48:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:13,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:13,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:13,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:13,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859170211] [2022-01-10 07:48:13,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859170211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:13,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:13,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:48:13,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645132916] [2022-01-10 07:48:13,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:13,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:13,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:13,599 INFO L87 Difference]: Start difference. First operand 3485 states and 5740 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:13,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:13,703 INFO L93 Difference]: Finished difference Result 5043 states and 7804 transitions. [2022-01-10 07:48:13,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:48:13,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:13,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:13,710 INFO L225 Difference]: With dead ends: 5043 [2022-01-10 07:48:13,710 INFO L226 Difference]: Without dead ends: 3695 [2022-01-10 07:48:13,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:48:13,716 INFO L933 BasicCegarLoop]: 4317 mSDtfsCounter, 284 mSDsluCounter, 13060 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 17377 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:13,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 17377 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:13,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-01-10 07:48:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3491. [2022-01-10 07:48:13,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3395 states have (on average 1.657437407952872) internal successors, (5627), 3399 states have internal predecessors, (5627), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 07:48:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5732 transitions. [2022-01-10 07:48:13,800 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5732 transitions. Word has length 124 [2022-01-10 07:48:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:13,801 INFO L470 AbstractCegarLoop]: Abstraction has 3491 states and 5732 transitions. [2022-01-10 07:48:13,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5732 transitions. [2022-01-10 07:48:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:13,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:13,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:13,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:14,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:14,010 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:14,010 INFO L85 PathProgramCache]: Analyzing trace with hash 402917946, now seen corresponding path program 1 times [2022-01-10 07:48:14,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:14,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011091141] [2022-01-10 07:48:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:14,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:14,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:14,011 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:14,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-01-10 07:48:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:14,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:14,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:14,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:14,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011091141] [2022-01-10 07:48:14,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011091141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:14,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:14,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:48:14,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117261802] [2022-01-10 07:48:14,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:14,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:14,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:14,257 INFO L87 Difference]: Start difference. First operand 3491 states and 5732 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:14,362 INFO L93 Difference]: Finished difference Result 5027 states and 7752 transitions. [2022-01-10 07:48:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:48:14,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:14,370 INFO L225 Difference]: With dead ends: 5027 [2022-01-10 07:48:14,370 INFO L226 Difference]: Without dead ends: 3673 [2022-01-10 07:48:14,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:48:14,374 INFO L933 BasicCegarLoop]: 4317 mSDtfsCounter, 245 mSDsluCounter, 13045 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 17362 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:14,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 17362 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2022-01-10 07:48:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 3497. [2022-01-10 07:48:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3401 states have (on average 1.6521611290796825) internal successors, (5619), 3405 states have internal predecessors, (5619), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 07:48:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 5724 transitions. [2022-01-10 07:48:14,516 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 5724 transitions. Word has length 124 [2022-01-10 07:48:14,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:14,517 INFO L470 AbstractCegarLoop]: Abstraction has 3497 states and 5724 transitions. [2022-01-10 07:48:14,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 5724 transitions. [2022-01-10 07:48:14,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:14,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:14,518 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:14,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:14,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:14,726 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:14,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1674418952, now seen corresponding path program 1 times [2022-01-10 07:48:14,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:14,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324416455] [2022-01-10 07:48:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:14,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:14,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:14,728 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:14,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-01-10 07:48:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:14,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:14,979 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:14,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324416455] [2022-01-10 07:48:14,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324416455] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:14,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:14,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:48:14,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641218969] [2022-01-10 07:48:14,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:14,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:14,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:14,982 INFO L87 Difference]: Start difference. First operand 3497 states and 5724 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:15,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:15,083 INFO L93 Difference]: Finished difference Result 5011 states and 7700 transitions. [2022-01-10 07:48:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:48:15,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:15,091 INFO L225 Difference]: With dead ends: 5011 [2022-01-10 07:48:15,091 INFO L226 Difference]: Without dead ends: 3651 [2022-01-10 07:48:15,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:48:15,095 INFO L933 BasicCegarLoop]: 4317 mSDtfsCounter, 206 mSDsluCounter, 13030 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 17347 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:15,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 17347 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2022-01-10 07:48:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 3503. [2022-01-10 07:48:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3407 states have (on average 1.6469034341062518) internal successors, (5611), 3411 states have internal predecessors, (5611), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 07:48:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 5716 transitions. [2022-01-10 07:48:15,183 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 5716 transitions. Word has length 124 [2022-01-10 07:48:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:15,184 INFO L470 AbstractCegarLoop]: Abstraction has 3503 states and 5716 transitions. [2022-01-10 07:48:15,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 5716 transitions. [2022-01-10 07:48:15,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:15,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:15,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:15,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:15,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:15,393 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash 234038838, now seen corresponding path program 1 times [2022-01-10 07:48:15,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:15,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892431818] [2022-01-10 07:48:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:15,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:15,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:15,395 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:15,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-01-10 07:48:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:15,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:15,624 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:15,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892431818] [2022-01-10 07:48:15,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892431818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:15,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:15,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:48:15,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372432318] [2022-01-10 07:48:15,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:15,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:15,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:15,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:15,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:15,625 INFO L87 Difference]: Start difference. First operand 3503 states and 5716 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:15,739 INFO L93 Difference]: Finished difference Result 4995 states and 7648 transitions. [2022-01-10 07:48:15,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:48:15,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:15,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:15,747 INFO L225 Difference]: With dead ends: 4995 [2022-01-10 07:48:15,747 INFO L226 Difference]: Without dead ends: 3629 [2022-01-10 07:48:15,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:48:15,751 INFO L933 BasicCegarLoop]: 4317 mSDtfsCounter, 167 mSDsluCounter, 13015 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 17332 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:15,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 17332 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:15,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2022-01-10 07:48:15,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3509. [2022-01-10 07:48:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3413 states have (on average 1.6416642250219748) internal successors, (5603), 3417 states have internal predecessors, (5603), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 07:48:15,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 5708 transitions. [2022-01-10 07:48:15,839 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 5708 transitions. Word has length 124 [2022-01-10 07:48:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:15,840 INFO L470 AbstractCegarLoop]: Abstraction has 3509 states and 5708 transitions. [2022-01-10 07:48:15,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 5708 transitions. [2022-01-10 07:48:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:15,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:15,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:15,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 07:48:16,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:16,048 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:16,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash 179645940, now seen corresponding path program 1 times [2022-01-10 07:48:16,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:16,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050018303] [2022-01-10 07:48:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:16,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:16,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:16,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:16,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-01-10 07:48:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:16,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:16,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:16,281 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:16,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050018303] [2022-01-10 07:48:16,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050018303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:16,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:16,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:48:16,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503914910] [2022-01-10 07:48:16,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:16,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:16,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:16,282 INFO L87 Difference]: Start difference. First operand 3509 states and 5708 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:16,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:16,382 INFO L93 Difference]: Finished difference Result 4951 states and 7560 transitions. [2022-01-10 07:48:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:48:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:16,398 INFO L225 Difference]: With dead ends: 4951 [2022-01-10 07:48:16,398 INFO L226 Difference]: Without dead ends: 3579 [2022-01-10 07:48:16,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:48:16,402 INFO L933 BasicCegarLoop]: 4317 mSDtfsCounter, 89 mSDsluCounter, 12985 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 17302 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:16,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 17302 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:16,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2022-01-10 07:48:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3515. [2022-01-10 07:48:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3515 states, 3419 states have (on average 1.636443404504241) internal successors, (5595), 3423 states have internal predecessors, (5595), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 07:48:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 5700 transitions. [2022-01-10 07:48:16,492 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 5700 transitions. Word has length 124 [2022-01-10 07:48:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:16,493 INFO L470 AbstractCegarLoop]: Abstraction has 3515 states and 5700 transitions. [2022-01-10 07:48:16,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:16,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 5700 transitions. [2022-01-10 07:48:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:16,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:16,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:16,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:16,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:16,701 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:16,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1717985970, now seen corresponding path program 1 times [2022-01-10 07:48:16,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:16,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852777027] [2022-01-10 07:48:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:16,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:16,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:16,703 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:16,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-01-10 07:48:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:16,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:16,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:16,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:16,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:16,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852777027] [2022-01-10 07:48:16,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852777027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:16,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:16,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:48:16,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692940730] [2022-01-10 07:48:16,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:16,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:16,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:16,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:16,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:16,903 INFO L87 Difference]: Start difference. First operand 3515 states and 5700 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:17,018 INFO L93 Difference]: Finished difference Result 5229 states and 7880 transitions. [2022-01-10 07:48:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:48:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:17,026 INFO L225 Difference]: With dead ends: 5229 [2022-01-10 07:48:17,026 INFO L226 Difference]: Without dead ends: 3851 [2022-01-10 07:48:17,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:48:17,030 INFO L933 BasicCegarLoop]: 4317 mSDtfsCounter, 50 mSDsluCounter, 12970 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17287 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:17,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 17287 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:17,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2022-01-10 07:48:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3563. [2022-01-10 07:48:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3467 states have (on average 1.627631958465532) internal successors, (5643), 3471 states have internal predecessors, (5643), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 07:48:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 5748 transitions. [2022-01-10 07:48:17,206 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 5748 transitions. Word has length 124 [2022-01-10 07:48:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:17,206 INFO L470 AbstractCegarLoop]: Abstraction has 3563 states and 5748 transitions. [2022-01-10 07:48:17,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 5748 transitions. [2022-01-10 07:48:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:17,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:17,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:17,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:17,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:17,416 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:17,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:17,416 INFO L85 PathProgramCache]: Analyzing trace with hash -648708624, now seen corresponding path program 1 times [2022-01-10 07:48:17,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:17,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430275459] [2022-01-10 07:48:17,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:17,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:17,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:17,418 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:17,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-01-10 07:48:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:48:17,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:17,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:17,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:17,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430275459] [2022-01-10 07:48:17,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430275459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:17,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:17,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:48:17,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355622207] [2022-01-10 07:48:17,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:17,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:48:17,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:17,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:48:17,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:17,659 INFO L87 Difference]: Start difference. First operand 3563 states and 5748 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:17,762 INFO L93 Difference]: Finished difference Result 5003 states and 7564 transitions. [2022-01-10 07:48:17,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:48:17,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-01-10 07:48:17,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:17,770 INFO L225 Difference]: With dead ends: 5003 [2022-01-10 07:48:17,770 INFO L226 Difference]: Without dead ends: 3577 [2022-01-10 07:48:17,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:48:17,774 INFO L933 BasicCegarLoop]: 4317 mSDtfsCounter, 10 mSDsluCounter, 12950 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 17267 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:17,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 17267 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:17,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2022-01-10 07:48:17,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 3569. [2022-01-10 07:48:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 3473 states have (on average 1.6225165562913908) internal successors, (5635), 3477 states have internal predecessors, (5635), 53 states have call successors, (53), 41 states have call predecessors, (53), 41 states have return successors, (52), 51 states have call predecessors, (52), 51 states have call successors, (52) [2022-01-10 07:48:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 5740 transitions. [2022-01-10 07:48:17,887 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 5740 transitions. Word has length 124 [2022-01-10 07:48:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:17,887 INFO L470 AbstractCegarLoop]: Abstraction has 3569 states and 5740 transitions. [2022-01-10 07:48:17,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:48:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 5740 transitions. [2022-01-10 07:48:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-10 07:48:17,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:17,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:17,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:18,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:18,096 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:18,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2020515922, now seen corresponding path program 1 times [2022-01-10 07:48:18,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:18,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008474537] [2022-01-10 07:48:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:18,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:18,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:18,098 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:18,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-01-10 07:48:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:18,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:48:18,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 07:48:18,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:18,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008474537] [2022-01-10 07:48:18,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008474537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:18,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:18,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 07:48:18,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289753175] [2022-01-10 07:48:18,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:48:18,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:48:18,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:18,356 INFO L87 Difference]: Start difference. First operand 3569 states and 5740 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 07:48:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:18,503 INFO L93 Difference]: Finished difference Result 6390 states and 9227 transitions. [2022-01-10 07:48:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:48:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 124 [2022-01-10 07:48:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:18,512 INFO L225 Difference]: With dead ends: 6390 [2022-01-10 07:48:18,512 INFO L226 Difference]: Without dead ends: 4958 [2022-01-10 07:48:18,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:18,517 INFO L933 BasicCegarLoop]: 4377 mSDtfsCounter, 4177 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4177 SdHoareTripleChecker+Valid, 4704 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:18,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4177 Valid, 4704 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4958 states. [2022-01-10 07:48:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4958 to 4956. [2022-01-10 07:48:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4956 states, 4772 states have (on average 1.5119446772841576) internal successors, (7215), 4779 states have internal predecessors, (7215), 100 states have call successors, (100), 81 states have call predecessors, (100), 82 states have return successors, (100), 96 states have call predecessors, (100), 98 states have call successors, (100) [2022-01-10 07:48:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4956 states to 4956 states and 7415 transitions. [2022-01-10 07:48:18,676 INFO L78 Accepts]: Start accepts. Automaton has 4956 states and 7415 transitions. Word has length 124 [2022-01-10 07:48:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:18,676 INFO L470 AbstractCegarLoop]: Abstraction has 4956 states and 7415 transitions. [2022-01-10 07:48:18,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 07:48:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 4956 states and 7415 transitions. [2022-01-10 07:48:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 07:48:18,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:18,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:18,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-01-10 07:48:18,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:18,886 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:18,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:18,887 INFO L85 PathProgramCache]: Analyzing trace with hash 543351248, now seen corresponding path program 1 times [2022-01-10 07:48:18,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:18,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271293211] [2022-01-10 07:48:18,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:18,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:18,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:18,889 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:18,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-01-10 07:48:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:19,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:48:19,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 07:48:19,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:19,310 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:19,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271293211] [2022-01-10 07:48:19,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271293211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:19,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:19,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:19,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715095417] [2022-01-10 07:48:19,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:19,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:48:19,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:48:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:48:19,312 INFO L87 Difference]: Start difference. First operand 4956 states and 7415 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:48:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:19,891 INFO L93 Difference]: Finished difference Result 10472 states and 14135 transitions. [2022-01-10 07:48:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:19,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 201 [2022-01-10 07:48:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:19,908 INFO L225 Difference]: With dead ends: 10472 [2022-01-10 07:48:19,909 INFO L226 Difference]: Without dead ends: 7654 [2022-01-10 07:48:19,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:19,916 INFO L933 BasicCegarLoop]: 4472 mSDtfsCounter, 4419 mSDsluCounter, 4569 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4425 SdHoareTripleChecker+Valid, 9041 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:19,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4425 Valid, 9041 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7654 states. [2022-01-10 07:48:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7654 to 7650. [2022-01-10 07:48:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7650 states, 7295 states have (on average 1.4095956134338588) internal successors, (10283), 7311 states have internal predecessors, (10283), 189 states have call successors, (189), 153 states have call predecessors, (189), 164 states have return successors, (211), 187 states have call predecessors, (211), 187 states have call successors, (211) [2022-01-10 07:48:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7650 states to 7650 states and 10683 transitions. [2022-01-10 07:48:20,259 INFO L78 Accepts]: Start accepts. Automaton has 7650 states and 10683 transitions. Word has length 201 [2022-01-10 07:48:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:20,259 INFO L470 AbstractCegarLoop]: Abstraction has 7650 states and 10683 transitions. [2022-01-10 07:48:20,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:48:20,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7650 states and 10683 transitions. [2022-01-10 07:48:20,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-10 07:48:20,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:20,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:20,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:20,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:20,472 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:20,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:20,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1030424974, now seen corresponding path program 1 times [2022-01-10 07:48:20,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:20,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975693184] [2022-01-10 07:48:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:20,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:20,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:20,474 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:20,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-01-10 07:48:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:20,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:48:20,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 07:48:20,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:20,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:20,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975693184] [2022-01-10 07:48:20,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975693184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:20,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:20,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:48:20,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106294092] [2022-01-10 07:48:20,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:20,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:48:20,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:20,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:48:20,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:20,779 INFO L87 Difference]: Start difference. First operand 7650 states and 10683 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:48:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:21,069 INFO L93 Difference]: Finished difference Result 13152 states and 17362 transitions. [2022-01-10 07:48:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:48:21,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 201 [2022-01-10 07:48:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:21,086 INFO L225 Difference]: With dead ends: 13152 [2022-01-10 07:48:21,086 INFO L226 Difference]: Without dead ends: 7640 [2022-01-10 07:48:21,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:21,097 INFO L933 BasicCegarLoop]: 4318 mSDtfsCounter, 353 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 8276 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:21,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 8276 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7640 states. [2022-01-10 07:48:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7640 to 7640. [2022-01-10 07:48:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7640 states, 7288 states have (on average 1.409165751920966) internal successors, (10270), 7303 states have internal predecessors, (10270), 186 states have call successors, (186), 153 states have call predecessors, (186), 164 states have return successors, (208), 184 states have call predecessors, (208), 184 states have call successors, (208) [2022-01-10 07:48:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7640 states to 7640 states and 10664 transitions. [2022-01-10 07:48:21,520 INFO L78 Accepts]: Start accepts. Automaton has 7640 states and 10664 transitions. Word has length 201 [2022-01-10 07:48:21,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:21,520 INFO L470 AbstractCegarLoop]: Abstraction has 7640 states and 10664 transitions. [2022-01-10 07:48:21,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:48:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 7640 states and 10664 transitions. [2022-01-10 07:48:21,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-10 07:48:21,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:21,525 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:21,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:21,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:21,732 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:21,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:21,733 INFO L85 PathProgramCache]: Analyzing trace with hash 889665055, now seen corresponding path program 1 times [2022-01-10 07:48:21,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:21,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969638740] [2022-01-10 07:48:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:21,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:21,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:21,734 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:21,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-01-10 07:48:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:21,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:48:21,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 07:48:22,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:22,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:22,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969638740] [2022-01-10 07:48:22,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969638740] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:22,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:22,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:22,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291334832] [2022-01-10 07:48:22,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:22,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:48:22,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:22,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:48:22,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:48:22,128 INFO L87 Difference]: Start difference. First operand 7640 states and 10664 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:48:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:22,840 INFO L93 Difference]: Finished difference Result 18197 states and 23494 transitions. [2022-01-10 07:48:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:22,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 202 [2022-01-10 07:48:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:22,863 INFO L225 Difference]: With dead ends: 18197 [2022-01-10 07:48:22,864 INFO L226 Difference]: Without dead ends: 12695 [2022-01-10 07:48:22,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:22,876 INFO L933 BasicCegarLoop]: 4455 mSDtfsCounter, 4414 mSDsluCounter, 4546 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4420 SdHoareTripleChecker+Valid, 9001 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:22,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4420 Valid, 9001 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12695 states. [2022-01-10 07:48:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12695 to 12691. [2022-01-10 07:48:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12691 states, 12016 states have (on average 1.33288948069241) internal successors, (16016), 12048 states have internal predecessors, (16016), 353 states have call successors, (353), 289 states have call predecessors, (353), 320 states have return successors, (419), 355 states have call predecessors, (419), 351 states have call successors, (419) [2022-01-10 07:48:23,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12691 states to 12691 states and 16788 transitions. [2022-01-10 07:48:23,537 INFO L78 Accepts]: Start accepts. Automaton has 12691 states and 16788 transitions. Word has length 202 [2022-01-10 07:48:23,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:23,537 INFO L470 AbstractCegarLoop]: Abstraction has 12691 states and 16788 transitions. [2022-01-10 07:48:23,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:48:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 12691 states and 16788 transitions. [2022-01-10 07:48:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-10 07:48:23,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:23,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:23,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:23,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:23,753 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1376738781, now seen corresponding path program 1 times [2022-01-10 07:48:23,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:23,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437875301] [2022-01-10 07:48:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:23,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:23,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:23,755 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:23,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 07:48:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:23,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:48:23,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 07:48:24,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:24,071 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:24,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437875301] [2022-01-10 07:48:24,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437875301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:24,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:24,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:48:24,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668041027] [2022-01-10 07:48:24,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:24,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:48:24,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:48:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:24,073 INFO L87 Difference]: Start difference. First operand 12691 states and 16788 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:48:24,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:24,682 INFO L93 Difference]: Finished difference Result 23235 states and 29575 transitions. [2022-01-10 07:48:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:48:24,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 202 [2022-01-10 07:48:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:24,705 INFO L225 Difference]: With dead ends: 23235 [2022-01-10 07:48:24,705 INFO L226 Difference]: Without dead ends: 12682 [2022-01-10 07:48:24,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:24,718 INFO L933 BasicCegarLoop]: 4317 mSDtfsCounter, 351 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 8275 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:24,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 8275 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12682 states. [2022-01-10 07:48:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12682 to 12682. [2022-01-10 07:48:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12682 states, 12010 states have (on average 1.332639467110741) internal successors, (16005), 12041 states have internal predecessors, (16005), 350 states have call successors, (350), 289 states have call predecessors, (350), 320 states have return successors, (416), 352 states have call predecessors, (416), 348 states have call successors, (416) [2022-01-10 07:48:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12682 states to 12682 states and 16771 transitions. [2022-01-10 07:48:25,291 INFO L78 Accepts]: Start accepts. Automaton has 12682 states and 16771 transitions. Word has length 202 [2022-01-10 07:48:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:25,291 INFO L470 AbstractCegarLoop]: Abstraction has 12682 states and 16771 transitions. [2022-01-10 07:48:25,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:48:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 12682 states and 16771 transitions. [2022-01-10 07:48:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 07:48:25,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:25,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:25,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:25,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:25,507 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1863147084, now seen corresponding path program 1 times [2022-01-10 07:48:25,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:25,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701591055] [2022-01-10 07:48:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:25,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:25,509 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:25,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 07:48:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:25,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:48:25,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 07:48:25,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:25,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:25,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701591055] [2022-01-10 07:48:25,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701591055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:25,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:25,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:25,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346053638] [2022-01-10 07:48:25,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:25,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:48:25,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:25,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:48:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:48:25,906 INFO L87 Difference]: Start difference. First operand 12682 states and 16771 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:48:27,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:27,220 INFO L93 Difference]: Finished difference Result 32882 states and 41295 transitions. [2022-01-10 07:48:27,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:27,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 203 [2022-01-10 07:48:27,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:27,256 INFO L225 Difference]: With dead ends: 32882 [2022-01-10 07:48:27,256 INFO L226 Difference]: Without dead ends: 22338 [2022-01-10 07:48:27,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:27,268 INFO L933 BasicCegarLoop]: 4444 mSDtfsCounter, 4407 mSDsluCounter, 4523 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4413 SdHoareTripleChecker+Valid, 8967 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:27,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4413 Valid, 8967 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:27,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22338 states. [2022-01-10 07:48:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22338 to 22334. [2022-01-10 07:48:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22334 states, 21043 states have (on average 1.2821840992253957) internal successors, (26981), 21111 states have internal predecessors, (26981), 665 states have call successors, (665), 545 states have call predecessors, (665), 624 states have return successors, (827), 679 states have call predecessors, (827), 663 states have call successors, (827) [2022-01-10 07:48:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22334 states to 22334 states and 28473 transitions. [2022-01-10 07:48:28,458 INFO L78 Accepts]: Start accepts. Automaton has 22334 states and 28473 transitions. Word has length 203 [2022-01-10 07:48:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:28,459 INFO L470 AbstractCegarLoop]: Abstraction has 22334 states and 28473 transitions. [2022-01-10 07:48:28,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:48:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 22334 states and 28473 transitions. [2022-01-10 07:48:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-10 07:48:28,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:28,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:28,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 07:48:28,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:28,677 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:28,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:28,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1376073358, now seen corresponding path program 1 times [2022-01-10 07:48:28,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:28,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177636959] [2022-01-10 07:48:28,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:28,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:28,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:28,679 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:28,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 07:48:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:28,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:48:28,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 07:48:28,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:28,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:28,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177636959] [2022-01-10 07:48:28,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177636959] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:28,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:28,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:48:28,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154102486] [2022-01-10 07:48:28,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:28,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:48:28,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:48:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:28,988 INFO L87 Difference]: Start difference. First operand 22334 states and 28473 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:48:30,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:30,134 INFO L93 Difference]: Finished difference Result 42522 states and 52948 transitions. [2022-01-10 07:48:30,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:48:30,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 203 [2022-01-10 07:48:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:30,178 INFO L225 Difference]: With dead ends: 42522 [2022-01-10 07:48:30,178 INFO L226 Difference]: Without dead ends: 22326 [2022-01-10 07:48:30,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:30,204 INFO L933 BasicCegarLoop]: 4316 mSDtfsCounter, 349 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 8274 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:30,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 8274 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22326 states. [2022-01-10 07:48:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22326 to 22326. [2022-01-10 07:48:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22326 states, 21038 states have (on average 1.28206103241753) internal successors, (26972), 21105 states have internal predecessors, (26972), 662 states have call successors, (662), 545 states have call predecessors, (662), 624 states have return successors, (824), 676 states have call predecessors, (824), 660 states have call successors, (824) [2022-01-10 07:48:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22326 states to 22326 states and 28458 transitions. [2022-01-10 07:48:31,602 INFO L78 Accepts]: Start accepts. Automaton has 22326 states and 28458 transitions. Word has length 203 [2022-01-10 07:48:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:31,603 INFO L470 AbstractCegarLoop]: Abstraction has 22326 states and 28458 transitions. [2022-01-10 07:48:31,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:48:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 22326 states and 28458 transitions. [2022-01-10 07:48:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-10 07:48:31,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:31,612 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:31,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:31,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:31,813 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:31,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:31,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1034854971, now seen corresponding path program 1 times [2022-01-10 07:48:31,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:31,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830612549] [2022-01-10 07:48:31,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:31,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:31,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:31,824 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:31,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 07:48:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:31,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:48:31,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 07:48:32,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:32,214 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:32,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830612549] [2022-01-10 07:48:32,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830612549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:32,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:32,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:32,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605538718] [2022-01-10 07:48:32,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:32,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:48:32,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:48:32,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:48:32,215 INFO L87 Difference]: Start difference. First operand 22326 states and 28458 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:48:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:34,945 INFO L93 Difference]: Finished difference Result 67289 states and 82893 transitions. [2022-01-10 07:48:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:34,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 204 [2022-01-10 07:48:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:35,044 INFO L225 Difference]: With dead ends: 67289 [2022-01-10 07:48:35,045 INFO L226 Difference]: Without dead ends: 47101 [2022-01-10 07:48:35,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:35,082 INFO L933 BasicCegarLoop]: 4447 mSDtfsCounter, 4412 mSDsluCounter, 4505 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4418 SdHoareTripleChecker+Valid, 8952 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:35,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4418 Valid, 8952 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47101 states. [2022-01-10 07:48:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47101 to 46009. [2022-01-10 07:48:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46009 states, 43150 states have (on average 1.2453765932792584) internal successors, (53738), 43490 states have internal predecessors, (53738), 1257 states have call successors, (1257), 1025 states have call predecessors, (1257), 1600 states have return successors, (2060), 1495 states have call predecessors, (2060), 1255 states have call successors, (2060) [2022-01-10 07:48:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46009 states to 46009 states and 57055 transitions. [2022-01-10 07:48:38,074 INFO L78 Accepts]: Start accepts. Automaton has 46009 states and 57055 transitions. Word has length 204 [2022-01-10 07:48:38,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:38,075 INFO L470 AbstractCegarLoop]: Abstraction has 46009 states and 57055 transitions. [2022-01-10 07:48:38,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:48:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 46009 states and 57055 transitions. [2022-01-10 07:48:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-10 07:48:38,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:38,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:38,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 07:48:38,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:38,302 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:38,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1521928697, now seen corresponding path program 1 times [2022-01-10 07:48:38,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:38,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642251610] [2022-01-10 07:48:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:38,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:38,304 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:38,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 07:48:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:48:38,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-01-10 07:48:38,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:38,608 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:38,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642251610] [2022-01-10 07:48:38,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642251610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:38,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:38,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:48:38,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198333773] [2022-01-10 07:48:38,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:38,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:48:38,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:38,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:48:38,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:38,609 INFO L87 Difference]: Start difference. First operand 46009 states and 57055 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:48:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:41,525 INFO L93 Difference]: Finished difference Result 89874 states and 110116 transitions. [2022-01-10 07:48:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:48:41,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 204 [2022-01-10 07:48:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:41,629 INFO L225 Difference]: With dead ends: 89874 [2022-01-10 07:48:41,629 INFO L226 Difference]: Without dead ends: 46002 [2022-01-10 07:48:41,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:48:41,683 INFO L933 BasicCegarLoop]: 4315 mSDtfsCounter, 347 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 8273 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:41,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 8273 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:48:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46002 states. [2022-01-10 07:48:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46002 to 46002. [2022-01-10 07:48:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46002 states, 43146 states have (on average 1.245329810411162) internal successors, (53731), 43485 states have internal predecessors, (53731), 1254 states have call successors, (1254), 1025 states have call predecessors, (1254), 1600 states have return successors, (2056), 1492 states have call predecessors, (2056), 1252 states have call successors, (2056) [2022-01-10 07:48:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46002 states to 46002 states and 57041 transitions. [2022-01-10 07:48:44,637 INFO L78 Accepts]: Start accepts. Automaton has 46002 states and 57041 transitions. Word has length 204 [2022-01-10 07:48:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:48:44,638 INFO L470 AbstractCegarLoop]: Abstraction has 46002 states and 57041 transitions. [2022-01-10 07:48:44,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 07:48:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 46002 states and 57041 transitions. [2022-01-10 07:48:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-10 07:48:44,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:48:44,657 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 07:48:44,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-01-10 07:48:44,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 07:48:44,864 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:48:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:48:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1047160424, now seen corresponding path program 1 times [2022-01-10 07:48:44,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:48:44,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206319585] [2022-01-10 07:48:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:48:44,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:48:44,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:48:44,866 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 07:48:44,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 07:48:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:48:44,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:48:44,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:48:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 07:48:45,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:48:45,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:48:45,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206319585] [2022-01-10 07:48:45,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206319585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:48:45,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:48:45,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:48:45,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250392498] [2022-01-10 07:48:45,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:48:45,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:48:45,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:48:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:48:45,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:48:45,282 INFO L87 Difference]: Start difference. First operand 46002 states and 57041 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 07:48:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:48:50,944 INFO L93 Difference]: Finished difference Result 133568 states and 162857 transitions. [2022-01-10 07:48:50,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:48:50,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 205 [2022-01-10 07:48:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:48:51,142 INFO L225 Difference]: With dead ends: 133568 [2022-01-10 07:48:51,143 INFO L226 Difference]: Without dead ends: 89704 [2022-01-10 07:48:51,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:48:51,338 INFO L933 BasicCegarLoop]: 4380 mSDtfsCounter, 4396 mSDsluCounter, 4444 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4402 SdHoareTripleChecker+Valid, 8824 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:48:51,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4402 Valid, 8824 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:48:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89704 states.