/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_label42+token_ring.06.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 07:40:18,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 07:40:18,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 07:40:18,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 07:40:18,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 07:40:18,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 07:40:18,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 07:40:18,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 07:40:18,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 07:40:18,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 07:40:18,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 07:40:18,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 07:40:18,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 07:40:18,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 07:40:18,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 07:40:18,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 07:40:18,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 07:40:18,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 07:40:18,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 07:40:18,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 07:40:18,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 07:40:18,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 07:40:18,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 07:40:18,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 07:40:19,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 07:40:19,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 07:40:19,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 07:40:19,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 07:40:19,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 07:40:19,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 07:40:19,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 07:40:19,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 07:40:19,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 07:40:19,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 07:40:19,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 07:40:19,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 07:40:19,021 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 07:40:19,052 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 07:40:19,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 07:40:19,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 07:40:19,053 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 07:40:19,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 07:40:19,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 07:40:19,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 07:40:19,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 07:40:19,056 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 07:40:19,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 07:40:19,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 07:40:19,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 07:40:19,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 07:40:19,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 07:40:19,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 07:40:19,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 07:40:19,057 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 07:40:19,057 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 07:40:19,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 07:40:19,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 07:40:19,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 07:40:19,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 07:40:19,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 07:40:19,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:40:19,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 07:40:19,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 07:40:19,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 07:40:19,060 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 07:40:19,060 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 07:40:19,060 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 07:40:19,060 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 07:40:19,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 07:40:19,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 07:40:19,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 07:40:19,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 07:40:19,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 07:40:19,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 07:40:19,307 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 07:40:19,308 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 07:40:19,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/Problem05_label42+token_ring.06.cil-1.c [2022-01-10 07:40:19,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b170fbb2/ae589cad984f4dae8da266e85bbb4da6/FLAG39984cd11 [2022-01-10 07:40:20,179 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 07:40:20,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/Problem05_label42+token_ring.06.cil-1.c [2022-01-10 07:40:20,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b170fbb2/ae589cad984f4dae8da266e85bbb4da6/FLAG39984cd11 [2022-01-10 07:40:20,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b170fbb2/ae589cad984f4dae8da266e85bbb4da6 [2022-01-10 07:40:20,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 07:40:20,670 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 07:40:20,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 07:40:20,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 07:40:20,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 07:40:20,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:40:20" (1/1) ... [2022-01-10 07:40:20,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1df36d4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:20, skipping insertion in model container [2022-01-10 07:40:20,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 07:40:20" (1/1) ... [2022-01-10 07:40:20,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 07:40:20,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 07:40:22,439 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_label42+token_ring.06.cil-1.c[378560,378573] [2022-01-10 07:40:22,460 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_label42+token_ring.06.cil-1.c[383339,383352] [2022-01-10 07:40:22,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:40:22,614 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 07:40:23,313 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_label42+token_ring.06.cil-1.c[378560,378573] [2022-01-10 07:40:23,327 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_label42+token_ring.06.cil-1.c[383339,383352] [2022-01-10 07:40:23,348 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 07:40:23,399 INFO L208 MainTranslator]: Completed translation [2022-01-10 07:40:23,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23 WrapperNode [2022-01-10 07:40:23,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 07:40:23,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 07:40:23,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 07:40:23,401 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 07:40:23,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:23,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:23,906 INFO L137 Inliner]: procedures = 57, calls = 60, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 12825 [2022-01-10 07:40:23,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 07:40:23,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 07:40:23,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 07:40:23,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 07:40:23,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:23,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:24,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:24,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:24,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:24,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:24,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:24,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 07:40:24,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 07:40:24,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 07:40:24,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 07:40:24,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (1/1) ... [2022-01-10 07:40:24,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 07:40:24,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 07:40:24,487 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 07:40:24,503 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 07:40:24,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 07:40:24,522 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-01-10 07:40:24,522 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-01-10 07:40:24,522 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 07:40:24,522 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 07:40:24,522 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-01-10 07:40:24,523 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-01-10 07:40:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 07:40:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-01-10 07:40:24,523 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-01-10 07:40:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-01-10 07:40:24,523 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-01-10 07:40:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-01-10 07:40:24,523 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-01-10 07:40:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-01-10 07:40:24,523 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-01-10 07:40:24,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 07:40:24,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 07:40:24,686 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 07:40:24,687 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 07:40:32,432 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 07:40:32,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 07:40:32,462 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-01-10 07:40:32,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:40:32 BoogieIcfgContainer [2022-01-10 07:40:32,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 07:40:32,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 07:40:32,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 07:40:32,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 07:40:32,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 07:40:20" (1/3) ... [2022-01-10 07:40:32,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab6c2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:40:32, skipping insertion in model container [2022-01-10 07:40:32,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 07:40:23" (2/3) ... [2022-01-10 07:40:32,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab6c2e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 07:40:32, skipping insertion in model container [2022-01-10 07:40:32,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 07:40:32" (3/3) ... [2022-01-10 07:40:32,474 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.06.cil-1.c [2022-01-10 07:40:32,478 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 07:40:32,478 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 07:40:32,534 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 07:40:32,540 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 07:40:32,540 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 07:40:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand has 2423 states, 2391 states have (on average 1.8515265579255542) internal successors, (4427), 2396 states have internal predecessors, (4427), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-10 07:40:32,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:32,604 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:32,605 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] [2022-01-10 07:40:32,605 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:32,609 INFO L85 PathProgramCache]: Analyzing trace with hash 787057146, now seen corresponding path program 1 times [2022-01-10 07:40:32,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:32,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904705831] [2022-01-10 07:40:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:32,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:32,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:32,623 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 07:40:32,624 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 07:40:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:32,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:40:32,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:33,051 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 07:40:33,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:33,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:33,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904705831] [2022-01-10 07:40:33,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904705831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:33,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:33,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:40:33,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016567741] [2022-01-10 07:40:33,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:33,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:40:33,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:40:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:40:33,094 INFO L87 Difference]: Start difference. First operand has 2423 states, 2391 states have (on average 1.8515265579255542) internal successors, (4427), 2396 states have internal predecessors, (4427), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 07:40:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:33,257 INFO L93 Difference]: Finished difference Result 4835 states and 8923 transitions. [2022-01-10 07:40:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:40:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:33,280 INFO L225 Difference]: With dead ends: 4835 [2022-01-10 07:40:33,281 INFO L226 Difference]: Without dead ends: 2355 [2022-01-10 07:40:33,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 07:40:33,291 INFO L933 BasicCegarLoop]: 4386 mSDtfsCounter, 353 mSDsluCounter, 4022 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 8408 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 07:40:33,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 8408 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-10 07:40:33,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2022-01-10 07:40:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2325 states have (on average 1.8391397849462365) internal successors, (4276), 2328 states have internal predecessors, (4276), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-10 07:40:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 4318 transitions. [2022-01-10 07:40:33,518 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 4318 transitions. Word has length 113 [2022-01-10 07:40:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:33,519 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 4318 transitions. [2022-01-10 07:40:33,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 07:40:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 4318 transitions. [2022-01-10 07:40:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:33,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:33,528 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] [2022-01-10 07:40:33,539 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 07:40:33,738 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 07:40:33,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:33,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:33,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1110439620, now seen corresponding path program 1 times [2022-01-10 07:40:33,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:33,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [393309994] [2022-01-10 07:40:33,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:33,741 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:33,743 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 07:40:33,747 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 07:40:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:33,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:33,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:34,112 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 07:40:34,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:34,113 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:34,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [393309994] [2022-01-10 07:40:34,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [393309994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:34,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:34,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:34,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346862022] [2022-01-10 07:40:34,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:34,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:34,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:34,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:34,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:34,119 INFO L87 Difference]: Start difference. First operand 2355 states and 4318 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:34,433 INFO L93 Difference]: Finished difference Result 2575 states and 4660 transitions. [2022-01-10 07:40:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:40:34,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:34,444 INFO L225 Difference]: With dead ends: 2575 [2022-01-10 07:40:34,444 INFO L226 Difference]: Without dead ends: 2355 [2022-01-10 07:40:34,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:34,447 INFO L933 BasicCegarLoop]: 4292 mSDtfsCounter, 4425 mSDsluCounter, 8303 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4439 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:34,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4439 Valid, 12595 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:40:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-10 07:40:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2022-01-10 07:40:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2325 states have (on average 1.8378494623655914) internal successors, (4273), 2328 states have internal predecessors, (4273), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-10 07:40:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 4315 transitions. [2022-01-10 07:40:34,495 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 4315 transitions. Word has length 113 [2022-01-10 07:40:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:34,496 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 4315 transitions. [2022-01-10 07:40:34,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 4315 transitions. [2022-01-10 07:40:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:34,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:34,497 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] [2022-01-10 07:40:34,510 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 07:40:34,707 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 07:40:34,707 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:34,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:34,708 INFO L85 PathProgramCache]: Analyzing trace with hash 168559040, now seen corresponding path program 1 times [2022-01-10 07:40:34,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:34,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298703035] [2022-01-10 07:40:34,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:34,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:34,710 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 07:40:34,712 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 07:40:34,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:34,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:34,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:35,019 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 07:40:35,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:35,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:35,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298703035] [2022-01-10 07:40:35,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298703035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:35,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:35,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:35,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735282642] [2022-01-10 07:40:35,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:35,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:35,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:35,022 INFO L87 Difference]: Start difference. First operand 2355 states and 4315 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:35,329 INFO L93 Difference]: Finished difference Result 2575 states and 4654 transitions. [2022-01-10 07:40:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:40:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:35,339 INFO L225 Difference]: With dead ends: 2575 [2022-01-10 07:40:35,340 INFO L226 Difference]: Without dead ends: 2355 [2022-01-10 07:40:35,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:35,342 INFO L933 BasicCegarLoop]: 4289 mSDtfsCounter, 4419 mSDsluCounter, 8299 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4433 SdHoareTripleChecker+Valid, 12588 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:35,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4433 Valid, 12588 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:40:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-10 07:40:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2022-01-10 07:40:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2325 states have (on average 1.8365591397849463) internal successors, (4270), 2328 states have internal predecessors, (4270), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-10 07:40:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 4312 transitions. [2022-01-10 07:40:35,387 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 4312 transitions. Word has length 113 [2022-01-10 07:40:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:35,388 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 4312 transitions. [2022-01-10 07:40:35,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 4312 transitions. [2022-01-10 07:40:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:35,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:35,390 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] [2022-01-10 07:40:35,402 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 07:40:35,603 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 07:40:35,603 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:35,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1450415874, now seen corresponding path program 1 times [2022-01-10 07:40:35,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:35,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555912443] [2022-01-10 07:40:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:35,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:35,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:35,605 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 07:40:35,606 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 07:40:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:35,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:35,900 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 07:40:35,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:35,900 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555912443] [2022-01-10 07:40:35,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555912443] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:35,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:35,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:35,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547184842] [2022-01-10 07:40:35,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:35,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:35,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:35,906 INFO L87 Difference]: Start difference. First operand 2355 states and 4312 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:36,198 INFO L93 Difference]: Finished difference Result 2575 states and 4648 transitions. [2022-01-10 07:40:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:40:36,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:36,208 INFO L225 Difference]: With dead ends: 2575 [2022-01-10 07:40:36,208 INFO L226 Difference]: Without dead ends: 2355 [2022-01-10 07:40:36,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:36,210 INFO L933 BasicCegarLoop]: 4286 mSDtfsCounter, 4413 mSDsluCounter, 8295 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4427 SdHoareTripleChecker+Valid, 12581 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:36,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4427 Valid, 12581 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:40:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-10 07:40:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2022-01-10 07:40:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2325 states have (on average 1.835268817204301) internal successors, (4267), 2328 states have internal predecessors, (4267), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-10 07:40:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 4309 transitions. [2022-01-10 07:40:36,290 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 4309 transitions. Word has length 113 [2022-01-10 07:40:36,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:36,290 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 4309 transitions. [2022-01-10 07:40:36,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 4309 transitions. [2022-01-10 07:40:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:36,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:36,293 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] [2022-01-10 07:40:36,305 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 07:40:36,502 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 07:40:36,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:36,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:36,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1632324990, now seen corresponding path program 1 times [2022-01-10 07:40:36,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:36,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336673219] [2022-01-10 07:40:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:36,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:36,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:36,506 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 07:40:36,510 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 07:40:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:36,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:36,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:36,801 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 07:40:36,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:36,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:36,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336673219] [2022-01-10 07:40:36,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336673219] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:36,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:36,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:36,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539023103] [2022-01-10 07:40:36,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:36,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:36,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:36,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:36,804 INFO L87 Difference]: Start difference. First operand 2355 states and 4309 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:37,087 INFO L93 Difference]: Finished difference Result 2575 states and 4642 transitions. [2022-01-10 07:40:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:40:37,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:37,097 INFO L225 Difference]: With dead ends: 2575 [2022-01-10 07:40:37,098 INFO L226 Difference]: Without dead ends: 2355 [2022-01-10 07:40:37,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:37,100 INFO L933 BasicCegarLoop]: 4283 mSDtfsCounter, 4407 mSDsluCounter, 8291 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4421 SdHoareTripleChecker+Valid, 12574 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:37,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4421 Valid, 12574 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:40:37,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-10 07:40:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2022-01-10 07:40:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2325 states have (on average 1.833978494623656) internal successors, (4264), 2328 states have internal predecessors, (4264), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-10 07:40:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 4306 transitions. [2022-01-10 07:40:37,156 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 4306 transitions. Word has length 113 [2022-01-10 07:40:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:37,156 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 4306 transitions. [2022-01-10 07:40:37,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 4306 transitions. [2022-01-10 07:40:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:37,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:37,158 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] [2022-01-10 07:40:37,173 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 07:40:37,367 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 07:40:37,368 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1638193026, now seen corresponding path program 1 times [2022-01-10 07:40:37,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:37,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616075733] [2022-01-10 07:40:37,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:37,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:37,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:37,371 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 07:40:37,373 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 07:40:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:37,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:37,665 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 07:40:37,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:37,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:37,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616075733] [2022-01-10 07:40:37,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616075733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:37,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:37,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:37,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412157760] [2022-01-10 07:40:37,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:37,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:37,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:37,667 INFO L87 Difference]: Start difference. First operand 2355 states and 4306 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:38,018 INFO L93 Difference]: Finished difference Result 2575 states and 4636 transitions. [2022-01-10 07:40:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:40:38,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:38,027 INFO L225 Difference]: With dead ends: 2575 [2022-01-10 07:40:38,028 INFO L226 Difference]: Without dead ends: 2355 [2022-01-10 07:40:38,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:38,029 INFO L933 BasicCegarLoop]: 4280 mSDtfsCounter, 4401 mSDsluCounter, 8287 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4415 SdHoareTripleChecker+Valid, 12567 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:38,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4415 Valid, 12567 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:40:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-10 07:40:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2022-01-10 07:40:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2325 states have (on average 1.8326881720430108) internal successors, (4261), 2328 states have internal predecessors, (4261), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-10 07:40:38,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 4303 transitions. [2022-01-10 07:40:38,074 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 4303 transitions. Word has length 113 [2022-01-10 07:40:38,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:38,074 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 4303 transitions. [2022-01-10 07:40:38,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:38,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 4303 transitions. [2022-01-10 07:40:38,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:38,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:38,076 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] [2022-01-10 07:40:38,089 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 07:40:38,288 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 07:40:38,288 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:38,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2102395650, now seen corresponding path program 1 times [2022-01-10 07:40:38,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:38,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395072332] [2022-01-10 07:40:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:38,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:38,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:38,290 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 07:40:38,291 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 07:40:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:38,579 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 07:40:38,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:38,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:38,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395072332] [2022-01-10 07:40:38,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395072332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:38,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:38,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:38,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773959012] [2022-01-10 07:40:38,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:38,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:38,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:38,581 INFO L87 Difference]: Start difference. First operand 2355 states and 4303 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:38,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:38,847 INFO L93 Difference]: Finished difference Result 2575 states and 4630 transitions. [2022-01-10 07:40:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 07:40:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:38,856 INFO L225 Difference]: With dead ends: 2575 [2022-01-10 07:40:38,856 INFO L226 Difference]: Without dead ends: 2355 [2022-01-10 07:40:38,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:38,858 INFO L933 BasicCegarLoop]: 4277 mSDtfsCounter, 4395 mSDsluCounter, 8283 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4409 SdHoareTripleChecker+Valid, 12560 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:38,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4409 Valid, 12560 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:40:38,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2022-01-10 07:40:38,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2355. [2022-01-10 07:40:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2325 states have (on average 1.8313978494623655) internal successors, (4258), 2328 states have internal predecessors, (4258), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-01-10 07:40:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 4300 transitions. [2022-01-10 07:40:38,921 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 4300 transitions. Word has length 113 [2022-01-10 07:40:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:38,921 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 4300 transitions. [2022-01-10 07:40:38,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 4300 transitions. [2022-01-10 07:40:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:38,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:38,923 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] [2022-01-10 07:40:38,937 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 07:40:39,133 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 07:40:39,133 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:39,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:39,134 INFO L85 PathProgramCache]: Analyzing trace with hash -824981506, now seen corresponding path program 1 times [2022-01-10 07:40:39,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:39,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416925557] [2022-01-10 07:40:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:39,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:39,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:39,136 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 07:40:39,138 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 07:40:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:39,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:39,390 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 07:40:39,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:39,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:39,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416925557] [2022-01-10 07:40:39,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416925557] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:39,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:39,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:39,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126125345] [2022-01-10 07:40:39,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:39,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:39,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:39,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:39,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:39,391 INFO L87 Difference]: Start difference. First operand 2355 states and 4300 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:39,794 INFO L93 Difference]: Finished difference Result 2629 states and 4708 transitions. [2022-01-10 07:40:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:40:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:39,804 INFO L225 Difference]: With dead ends: 2629 [2022-01-10 07:40:39,804 INFO L226 Difference]: Without dead ends: 2409 [2022-01-10 07:40:39,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:39,806 INFO L933 BasicCegarLoop]: 4274 mSDtfsCounter, 4455 mSDsluCounter, 8278 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4469 SdHoareTripleChecker+Valid, 12552 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:39,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4469 Valid, 12552 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:40:39,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2022-01-10 07:40:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2409. [2022-01-10 07:40:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2376 states have (on average 1.8207070707070707) internal successors, (4326), 2379 states have internal predecessors, (4326), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-10 07:40:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 4370 transitions. [2022-01-10 07:40:39,855 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 4370 transitions. Word has length 113 [2022-01-10 07:40:39,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:39,856 INFO L470 AbstractCegarLoop]: Abstraction has 2409 states and 4370 transitions. [2022-01-10 07:40:39,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 4370 transitions. [2022-01-10 07:40:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:39,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:39,857 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] [2022-01-10 07:40:39,869 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 07:40:40,067 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 07:40:40,067 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:40,068 INFO L85 PathProgramCache]: Analyzing trace with hash -949639711, now seen corresponding path program 1 times [2022-01-10 07:40:40,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:40,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251950587] [2022-01-10 07:40:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:40,069 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:40,070 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 07:40:40,072 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 07:40:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:40,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:40,354 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 07:40:40,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:40,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:40,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251950587] [2022-01-10 07:40:40,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251950587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:40,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:40,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:40,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307700034] [2022-01-10 07:40:40,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:40,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:40,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:40,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:40,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:40,356 INFO L87 Difference]: Start difference. First operand 2409 states and 4370 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:40,714 INFO L93 Difference]: Finished difference Result 2737 states and 4848 transitions. [2022-01-10 07:40:40,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:40:40,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:40,733 INFO L225 Difference]: With dead ends: 2737 [2022-01-10 07:40:40,733 INFO L226 Difference]: Without dead ends: 2463 [2022-01-10 07:40:40,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:40,737 INFO L933 BasicCegarLoop]: 4271 mSDtfsCounter, 4447 mSDsluCounter, 8274 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4461 SdHoareTripleChecker+Valid, 12545 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:40,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4461 Valid, 12545 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:40:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-01-10 07:40:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2463. [2022-01-10 07:40:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2427 states have (on average 1.8096415327564894) internal successors, (4392), 2430 states have internal predecessors, (4392), 24 states have call successors, (24), 11 states have call predecessors, (24), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-10 07:40:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 4438 transitions. [2022-01-10 07:40:40,789 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 4438 transitions. Word has length 113 [2022-01-10 07:40:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 2463 states and 4438 transitions. [2022-01-10 07:40:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 4438 transitions. [2022-01-10 07:40:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:40,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:40,791 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] [2022-01-10 07:40:40,802 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 07:40:41,000 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 07:40:41,001 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:41,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1721625412, now seen corresponding path program 1 times [2022-01-10 07:40:41,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:41,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250860952] [2022-01-10 07:40:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:41,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:41,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:41,003 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 07:40:41,005 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 07:40:41,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:41,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:41,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:41,271 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 07:40:41,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:41,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:41,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250860952] [2022-01-10 07:40:41,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250860952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:41,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:41,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:41,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961893901] [2022-01-10 07:40:41,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:41,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:41,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:41,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:41,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:41,274 INFO L87 Difference]: Start difference. First operand 2463 states and 4438 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:41,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:41,611 INFO L93 Difference]: Finished difference Result 2845 states and 4984 transitions. [2022-01-10 07:40:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:40:41,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:41,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:41,625 INFO L225 Difference]: With dead ends: 2845 [2022-01-10 07:40:41,625 INFO L226 Difference]: Without dead ends: 2517 [2022-01-10 07:40:41,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:41,627 INFO L933 BasicCegarLoop]: 4267 mSDtfsCounter, 4441 mSDsluCounter, 8270 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4455 SdHoareTripleChecker+Valid, 12537 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:41,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4455 Valid, 12537 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:40:41,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2022-01-10 07:40:41,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 2517. [2022-01-10 07:40:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2478 states have (on average 1.7982243744955608) internal successors, (4456), 2481 states have internal predecessors, (4456), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-10 07:40:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 4504 transitions. [2022-01-10 07:40:41,682 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 4504 transitions. Word has length 113 [2022-01-10 07:40:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:41,682 INFO L470 AbstractCegarLoop]: Abstraction has 2517 states and 4504 transitions. [2022-01-10 07:40:41,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:41,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 4504 transitions. [2022-01-10 07:40:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:41,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:41,683 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] [2022-01-10 07:40:41,695 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 07:40:41,893 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 07:40:41,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:41,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2143433567, now seen corresponding path program 1 times [2022-01-10 07:40:41,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:41,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548625293] [2022-01-10 07:40:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:41,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:41,895 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 07:40:41,896 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 07:40:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:41,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:42,161 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 07:40:42,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:42,161 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:42,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548625293] [2022-01-10 07:40:42,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548625293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:42,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:42,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:42,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035393049] [2022-01-10 07:40:42,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:42,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:42,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:42,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:42,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:42,163 INFO L87 Difference]: Start difference. First operand 2517 states and 4504 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:42,490 INFO L93 Difference]: Finished difference Result 2953 states and 5116 transitions. [2022-01-10 07:40:42,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:40:42,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:42,496 INFO L225 Difference]: With dead ends: 2953 [2022-01-10 07:40:42,497 INFO L226 Difference]: Without dead ends: 2571 [2022-01-10 07:40:42,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:42,499 INFO L933 BasicCegarLoop]: 4264 mSDtfsCounter, 4434 mSDsluCounter, 8266 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4448 SdHoareTripleChecker+Valid, 12530 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:42,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4448 Valid, 12530 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:40:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2022-01-10 07:40:42,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2571. [2022-01-10 07:40:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2529 states have (on average 1.7864768683274022) internal successors, (4518), 2532 states have internal predecessors, (4518), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-10 07:40:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 4568 transitions. [2022-01-10 07:40:42,549 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 4568 transitions. Word has length 113 [2022-01-10 07:40:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:42,549 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 4568 transitions. [2022-01-10 07:40:42,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 4568 transitions. [2022-01-10 07:40:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:42,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:42,551 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] [2022-01-10 07:40:42,561 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 07:40:42,761 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 07:40:42,761 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2072389083, now seen corresponding path program 1 times [2022-01-10 07:40:42,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:42,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528261242] [2022-01-10 07:40:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:42,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:42,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:42,763 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 07:40:42,764 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 07:40:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:43,036 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 07:40:43,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:43,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:43,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528261242] [2022-01-10 07:40:43,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528261242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:43,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:43,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:43,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134874039] [2022-01-10 07:40:43,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:43,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:43,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:43,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:43,038 INFO L87 Difference]: Start difference. First operand 2571 states and 4568 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:43,370 INFO L93 Difference]: Finished difference Result 3061 states and 5244 transitions. [2022-01-10 07:40:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:40:43,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:43,379 INFO L225 Difference]: With dead ends: 3061 [2022-01-10 07:40:43,379 INFO L226 Difference]: Without dead ends: 2625 [2022-01-10 07:40:43,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:43,382 INFO L933 BasicCegarLoop]: 4261 mSDtfsCounter, 4427 mSDsluCounter, 8262 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4441 SdHoareTripleChecker+Valid, 12523 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:43,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4441 Valid, 12523 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:40:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2022-01-10 07:40:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2625. [2022-01-10 07:40:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2580 states have (on average 1.7744186046511627) internal successors, (4578), 2583 states have internal predecessors, (4578), 27 states have call successors, (27), 17 states have call predecessors, (27), 16 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-10 07:40:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 4630 transitions. [2022-01-10 07:40:43,439 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 4630 transitions. Word has length 113 [2022-01-10 07:40:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:43,439 INFO L470 AbstractCegarLoop]: Abstraction has 2625 states and 4630 transitions. [2022-01-10 07:40:43,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 4630 transitions. [2022-01-10 07:40:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:43,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:43,441 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] [2022-01-10 07:40:43,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-01-10 07:40:43,653 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 07:40:43,653 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:43,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1995136704, now seen corresponding path program 1 times [2022-01-10 07:40:43,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:43,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346413799] [2022-01-10 07:40:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:43,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:43,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:43,655 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 07:40:43,656 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 07:40:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:43,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:43,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:43,929 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 07:40:43,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:43,930 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:43,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346413799] [2022-01-10 07:40:43,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346413799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:43,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:43,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:43,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961447306] [2022-01-10 07:40:43,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:43,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:43,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:43,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:43,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:43,931 INFO L87 Difference]: Start difference. First operand 2625 states and 4630 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:44,296 INFO L93 Difference]: Finished difference Result 3169 states and 5368 transitions. [2022-01-10 07:40:44,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:40:44,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:44,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:44,301 INFO L225 Difference]: With dead ends: 3169 [2022-01-10 07:40:44,301 INFO L226 Difference]: Without dead ends: 2679 [2022-01-10 07:40:44,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 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 07:40:44,303 INFO L933 BasicCegarLoop]: 4258 mSDtfsCounter, 4420 mSDsluCounter, 8258 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4434 SdHoareTripleChecker+Valid, 12516 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:44,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4434 Valid, 12516 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:40:44,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2022-01-10 07:40:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2679. [2022-01-10 07:40:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2679 states, 2631 states have (on average 1.7620676548840746) internal successors, (4636), 2634 states have internal predecessors, (4636), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 07:40:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2679 states to 2679 states and 4690 transitions. [2022-01-10 07:40:44,355 INFO L78 Accepts]: Start accepts. Automaton has 2679 states and 4690 transitions. Word has length 113 [2022-01-10 07:40:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:44,355 INFO L470 AbstractCegarLoop]: Abstraction has 2679 states and 4690 transitions. [2022-01-10 07:40:44,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 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 07:40:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2679 states and 4690 transitions. [2022-01-10 07:40:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:44,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:44,356 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] [2022-01-10 07:40:44,368 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 07:40:44,566 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 07:40:44,566 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:44,567 INFO L85 PathProgramCache]: Analyzing trace with hash -552272572, now seen corresponding path program 1 times [2022-01-10 07:40:44,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:44,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476920747] [2022-01-10 07:40:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:44,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:44,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:44,569 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 07:40:44,570 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 07:40:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:44,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:44,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:44,803 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 07:40:44,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:44,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:44,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476920747] [2022-01-10 07:40:44,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476920747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:44,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:44,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:40:44,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941389465] [2022-01-10 07:40:44,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:44,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:44,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:44,805 INFO L87 Difference]: Start difference. First operand 2679 states and 4690 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:44,897 INFO L93 Difference]: Finished difference Result 3313 states and 5533 transitions. [2022-01-10 07:40:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:40:44,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:44,906 INFO L225 Difference]: With dead ends: 3313 [2022-01-10 07:40:44,906 INFO L226 Difference]: Without dead ends: 2770 [2022-01-10 07:40:44,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 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 07:40:44,908 INFO L933 BasicCegarLoop]: 4279 mSDtfsCounter, 245 mSDsluCounter, 12931 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 17210 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 07:40:44,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 17210 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2770 states. [2022-01-10 07:40:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2770 to 2682. [2022-01-10 07:40:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2634 states have (on average 1.7589217919514046) internal successors, (4633), 2637 states have internal predecessors, (4633), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 07:40:44,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 4687 transitions. [2022-01-10 07:40:44,979 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 4687 transitions. Word has length 113 [2022-01-10 07:40:44,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:44,979 INFO L470 AbstractCegarLoop]: Abstraction has 2682 states and 4687 transitions. [2022-01-10 07:40:44,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:44,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 4687 transitions. [2022-01-10 07:40:44,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:44,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:44,981 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] [2022-01-10 07:40:44,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 07:40:45,193 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 07:40:45,193 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:45,194 INFO L85 PathProgramCache]: Analyzing trace with hash 334950274, now seen corresponding path program 1 times [2022-01-10 07:40:45,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:45,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311122043] [2022-01-10 07:40:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:45,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:45,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:45,195 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 07:40:45,196 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 07:40:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:45,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:45,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:45,424 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 07:40:45,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:45,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:45,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311122043] [2022-01-10 07:40:45,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311122043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:45,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:45,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:40:45,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517526643] [2022-01-10 07:40:45,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:45,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:45,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:45,426 INFO L87 Difference]: Start difference. First operand 2682 states and 4687 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:45,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:45,535 INFO L93 Difference]: Finished difference Result 3767 states and 6111 transitions. [2022-01-10 07:40:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:40:45,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:45,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:45,543 INFO L225 Difference]: With dead ends: 3767 [2022-01-10 07:40:45,543 INFO L226 Difference]: Without dead ends: 3221 [2022-01-10 07:40:45,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 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 07:40:45,546 INFO L933 BasicCegarLoop]: 4279 mSDtfsCounter, 210 mSDsluCounter, 12936 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 17215 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 07:40:45,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 17215 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2022-01-10 07:40:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 2703. [2022-01-10 07:40:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2655 states have (on average 1.7529190207156309) internal successors, (4654), 2658 states have internal predecessors, (4654), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 07:40:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 4708 transitions. [2022-01-10 07:40:45,617 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 4708 transitions. Word has length 113 [2022-01-10 07:40:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:45,618 INFO L470 AbstractCegarLoop]: Abstraction has 2703 states and 4708 transitions. [2022-01-10 07:40:45,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 4708 transitions. [2022-01-10 07:40:45,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:45,619 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:45,619 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] [2022-01-10 07:40:45,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 07:40:45,829 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 07:40:45,829 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:45,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1288890432, now seen corresponding path program 1 times [2022-01-10 07:40:45,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:45,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900928095] [2022-01-10 07:40:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:45,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:45,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:45,831 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 07:40:45,832 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 07:40:45,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:45,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:46,055 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 07:40:46,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:46,056 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:46,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900928095] [2022-01-10 07:40:46,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900928095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:46,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:46,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:40:46,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058253736] [2022-01-10 07:40:46,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:46,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:46,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:46,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:46,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:46,057 INFO L87 Difference]: Start difference. First operand 2703 states and 4708 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:46,144 INFO L93 Difference]: Finished difference Result 3333 states and 5531 transitions. [2022-01-10 07:40:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:40:46,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:46,150 INFO L225 Difference]: With dead ends: 3333 [2022-01-10 07:40:46,150 INFO L226 Difference]: Without dead ends: 2766 [2022-01-10 07:40:46,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 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 07:40:46,154 INFO L933 BasicCegarLoop]: 4281 mSDtfsCounter, 166 mSDsluCounter, 12902 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 17183 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 07:40:46,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 17183 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2022-01-10 07:40:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2706. [2022-01-10 07:40:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2706 states, 2658 states have (on average 1.7498118886380738) internal successors, (4651), 2661 states have internal predecessors, (4651), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 07:40:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2706 states to 2706 states and 4705 transitions. [2022-01-10 07:40:46,216 INFO L78 Accepts]: Start accepts. Automaton has 2706 states and 4705 transitions. Word has length 113 [2022-01-10 07:40:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:46,216 INFO L470 AbstractCegarLoop]: Abstraction has 2706 states and 4705 transitions. [2022-01-10 07:40:46,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2706 states and 4705 transitions. [2022-01-10 07:40:46,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:46,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:46,217 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] [2022-01-10 07:40:46,227 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 07:40:46,426 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 07:40:46,427 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1968162686, now seen corresponding path program 1 times [2022-01-10 07:40:46,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107945179] [2022-01-10 07:40:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:46,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:46,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:46,429 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 07:40:46,431 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 07:40:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:46,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:46,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:46,641 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 07:40:46,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:46,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:46,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107945179] [2022-01-10 07:40:46,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107945179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:46,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:46,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:40:46,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583587355] [2022-01-10 07:40:46,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:46,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:46,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:46,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:46,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:46,642 INFO L87 Difference]: Start difference. First operand 2706 states and 4705 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:46,710 INFO L93 Difference]: Finished difference Result 3325 states and 5507 transitions. [2022-01-10 07:40:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:40:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:46,717 INFO L225 Difference]: With dead ends: 3325 [2022-01-10 07:40:46,717 INFO L226 Difference]: Without dead ends: 2755 [2022-01-10 07:40:46,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 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 07:40:46,719 INFO L933 BasicCegarLoop]: 4279 mSDtfsCounter, 127 mSDsluCounter, 12881 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 17160 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 07:40:46,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 17160 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2022-01-10 07:40:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2709. [2022-01-10 07:40:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2661 states have (on average 1.7467117624953026) internal successors, (4648), 2664 states have internal predecessors, (4648), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 07:40:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 4702 transitions. [2022-01-10 07:40:46,782 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 4702 transitions. Word has length 113 [2022-01-10 07:40:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:46,782 INFO L470 AbstractCegarLoop]: Abstraction has 2709 states and 4702 transitions. [2022-01-10 07:40:46,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 4702 transitions. [2022-01-10 07:40:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:46,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:46,784 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] [2022-01-10 07:40:46,795 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 07:40:46,993 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 07:40:46,993 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:46,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2008837436, now seen corresponding path program 1 times [2022-01-10 07:40:46,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:46,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469846421] [2022-01-10 07:40:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:46,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:46,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:46,995 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 07:40:46,998 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 07:40:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:47,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:47,219 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 07:40:47,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:47,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:47,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469846421] [2022-01-10 07:40:47,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469846421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:47,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:47,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:40:47,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828105124] [2022-01-10 07:40:47,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:47,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:47,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:47,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:47,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:47,220 INFO L87 Difference]: Start difference. First operand 2709 states and 4702 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:47,294 INFO L93 Difference]: Finished difference Result 3303 states and 5465 transitions. [2022-01-10 07:40:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:40:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:47,300 INFO L225 Difference]: With dead ends: 3303 [2022-01-10 07:40:47,300 INFO L226 Difference]: Without dead ends: 2730 [2022-01-10 07:40:47,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 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 07:40:47,302 INFO L933 BasicCegarLoop]: 4279 mSDtfsCounter, 49 mSDsluCounter, 12851 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 17130 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 07:40:47,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 17130 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2022-01-10 07:40:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2712. [2022-01-10 07:40:47,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2664 states have (on average 1.7436186186186187) internal successors, (4645), 2667 states have internal predecessors, (4645), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 07:40:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 4699 transitions. [2022-01-10 07:40:47,393 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 4699 transitions. Word has length 113 [2022-01-10 07:40:47,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:47,393 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 4699 transitions. [2022-01-10 07:40:47,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 4699 transitions. [2022-01-10 07:40:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:47,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:47,394 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] [2022-01-10 07:40:47,410 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 07:40:47,595 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 07:40:47,595 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:47,596 INFO L85 PathProgramCache]: Analyzing trace with hash -40550406, now seen corresponding path program 1 times [2022-01-10 07:40:47,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:47,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530334297] [2022-01-10 07:40:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:47,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:47,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:47,598 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 07:40:47,623 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 07:40:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:47,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 07:40:47,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:47,849 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 07:40:47,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:47,849 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:47,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530334297] [2022-01-10 07:40:47,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530334297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:47,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:47,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 07:40:47,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427183495] [2022-01-10 07:40:47,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:47,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:47,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:47,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:47,851 INFO L87 Difference]: Start difference. First operand 2712 states and 4699 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:47,929 INFO L93 Difference]: Finished difference Result 3295 states and 5441 transitions. [2022-01-10 07:40:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:40:47,930 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:47,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:47,936 INFO L225 Difference]: With dead ends: 3295 [2022-01-10 07:40:47,936 INFO L226 Difference]: Without dead ends: 2719 [2022-01-10 07:40:47,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 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 07:40:47,939 INFO L933 BasicCegarLoop]: 4279 mSDtfsCounter, 10 mSDsluCounter, 12836 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 17115 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 07:40:47,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 17115 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:47,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2022-01-10 07:40:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2715. [2022-01-10 07:40:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2667 states have (on average 1.7405324334458192) internal successors, (4642), 2670 states have internal predecessors, (4642), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 07:40:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 4696 transitions. [2022-01-10 07:40:48,042 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 4696 transitions. Word has length 113 [2022-01-10 07:40:48,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:48,042 INFO L470 AbstractCegarLoop]: Abstraction has 2715 states and 4696 transitions. [2022-01-10 07:40:48,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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 07:40:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 4696 transitions. [2022-01-10 07:40:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:48,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:48,043 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] [2022-01-10 07:40:48,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-01-10 07:40:48,252 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 07:40:48,253 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1069909704, now seen corresponding path program 1 times [2022-01-10 07:40:48,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:48,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811187804] [2022-01-10 07:40:48,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:48,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:48,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:48,255 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 07:40:48,291 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 07:40:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:48,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:40:48,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:48,545 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 07:40:48,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:48,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:48,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811187804] [2022-01-10 07:40:48,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811187804] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:48,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:48,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:48,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395854069] [2022-01-10 07:40:48,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:48,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:48,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:48,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:48,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:48,547 INFO L87 Difference]: Start difference. First operand 2715 states and 4696 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:40:48,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:48,976 INFO L93 Difference]: Finished difference Result 3899 states and 6154 transitions. [2022-01-10 07:40:48,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:40:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-01-10 07:40:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:48,983 INFO L225 Difference]: With dead ends: 3899 [2022-01-10 07:40:48,984 INFO L226 Difference]: Without dead ends: 3319 [2022-01-10 07:40:48,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:40:48,986 INFO L933 BasicCegarLoop]: 4295 mSDtfsCounter, 4426 mSDsluCounter, 8484 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4439 SdHoareTripleChecker+Valid, 12779 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:48,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4439 Valid, 12779 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 07:40:48,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2022-01-10 07:40:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 3300. [2022-01-10 07:40:49,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 3212 states have (on average 1.6550435865504358) internal successors, (5316), 3216 states have internal predecessors, (5316), 49 states have call successors, (49), 37 states have call predecessors, (49), 37 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 07:40:49,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 5413 transitions. [2022-01-10 07:40:49,086 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 5413 transitions. Word has length 113 [2022-01-10 07:40:49,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:49,087 INFO L470 AbstractCegarLoop]: Abstraction has 3300 states and 5413 transitions. [2022-01-10 07:40:49,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:40:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 5413 transitions. [2022-01-10 07:40:49,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:49,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:49,088 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] [2022-01-10 07:40:49,100 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 07:40:49,300 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 07:40:49,300 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:49,301 INFO L85 PathProgramCache]: Analyzing trace with hash 981074294, now seen corresponding path program 1 times [2022-01-10 07:40:49,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:49,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286912351] [2022-01-10 07:40:49,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:49,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:49,302 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 07:40:49,304 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 07:40:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 07:40:49,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:49,572 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 07:40:49,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:49,572 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:49,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286912351] [2022-01-10 07:40:49,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286912351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:49,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:49,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:49,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140138367] [2022-01-10 07:40:49,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:49,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 07:40:49,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:49,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 07:40:49,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 07:40:49,574 INFO L87 Difference]: Start difference. First operand 3300 states and 5413 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:40:49,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:49,917 INFO L93 Difference]: Finished difference Result 4609 states and 7041 transitions. [2022-01-10 07:40:49,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 07:40:49,918 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 113 [2022-01-10 07:40:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:49,924 INFO L225 Difference]: With dead ends: 4609 [2022-01-10 07:40:49,924 INFO L226 Difference]: Without dead ends: 3444 [2022-01-10 07:40:49,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 07:40:49,928 INFO L933 BasicCegarLoop]: 4304 mSDtfsCounter, 4399 mSDsluCounter, 8254 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4412 SdHoareTripleChecker+Valid, 12558 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:49,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4412 Valid, 12558 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:40:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2022-01-10 07:40:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3366. [2022-01-10 07:40:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3276 states have (on average 1.6376678876678876) internal successors, (5365), 3280 states have internal predecessors, (5365), 49 states have call successors, (49), 39 states have call predecessors, (49), 39 states have return successors, (48), 47 states have call predecessors, (48), 47 states have call successors, (48) [2022-01-10 07:40:50,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 5462 transitions. [2022-01-10 07:40:50,037 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 5462 transitions. Word has length 113 [2022-01-10 07:40:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:50,039 INFO L470 AbstractCegarLoop]: Abstraction has 3366 states and 5462 transitions. [2022-01-10 07:40:50,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 07:40:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 5462 transitions. [2022-01-10 07:40:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-10 07:40:50,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:50,040 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] [2022-01-10 07:40:50,051 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 07:40:50,250 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 07:40:50,251 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:50,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1043113908, now seen corresponding path program 1 times [2022-01-10 07:40:50,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132415407] [2022-01-10 07:40:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:50,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:50,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:50,253 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 07:40:50,255 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 07:40:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:50,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:40:50,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:50,547 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 07:40:50,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:50,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:50,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132415407] [2022-01-10 07:40:50,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132415407] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:50,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:50,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 07:40:50,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910661832] [2022-01-10 07:40:50,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:50,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:40:50,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:50,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:40:50,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:40:50,549 INFO L87 Difference]: Start difference. First operand 3366 states and 5462 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 07:40:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:50,710 INFO L93 Difference]: Finished difference Result 5783 states and 8393 transitions. [2022-01-10 07:40:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:40:50,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 113 [2022-01-10 07:40:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:50,721 INFO L225 Difference]: With dead ends: 5783 [2022-01-10 07:40:50,721 INFO L226 Difference]: Without dead ends: 4553 [2022-01-10 07:40:50,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 07:40:50,726 INFO L933 BasicCegarLoop]: 4330 mSDtfsCounter, 4147 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4147 SdHoareTripleChecker+Valid, 4618 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 07:40:50,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4147 Valid, 4618 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2022-01-10 07:40:50,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 4551. [2022-01-10 07:40:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4551 states, 4379 states have (on average 1.5247773464261247) internal successors, (6677), 4386 states have internal predecessors, (6677), 92 states have call successors, (92), 77 states have call predecessors, (92), 78 states have return successors, (92), 88 states have call predecessors, (92), 90 states have call successors, (92) [2022-01-10 07:40:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4551 states to 4551 states and 6861 transitions. [2022-01-10 07:40:50,990 INFO L78 Accepts]: Start accepts. Automaton has 4551 states and 6861 transitions. Word has length 113 [2022-01-10 07:40:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:50,991 INFO L470 AbstractCegarLoop]: Abstraction has 4551 states and 6861 transitions. [2022-01-10 07:40:50,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 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 07:40:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4551 states and 6861 transitions. [2022-01-10 07:40:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-10 07:40:50,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:50,996 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:51,010 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 07:40:51,205 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 07:40:51,205 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:51,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1362463871, now seen corresponding path program 1 times [2022-01-10 07:40:51,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:51,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54177999] [2022-01-10 07:40:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:51,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:51,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:51,208 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 07:40:51,209 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 07:40:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:40:51,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 07:40:51,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:51,631 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:51,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54177999] [2022-01-10 07:40:51,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54177999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:51,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:51,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:51,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679440743] [2022-01-10 07:40:51,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:51,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:40:51,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:51,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:40:51,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:40:51,632 INFO L87 Difference]: Start difference. First operand 4551 states and 6861 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 07:40:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:52,087 INFO L93 Difference]: Finished difference Result 9262 states and 12483 transitions. [2022-01-10 07:40:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:40:52,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 183 [2022-01-10 07:40:52,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:52,102 INFO L225 Difference]: With dead ends: 9262 [2022-01-10 07:40:52,102 INFO L226 Difference]: Without dead ends: 6848 [2022-01-10 07:40:52,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 181 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 07:40:52,110 INFO L933 BasicCegarLoop]: 4413 mSDtfsCounter, 4350 mSDsluCounter, 4493 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4356 SdHoareTripleChecker+Valid, 8906 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:52,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4356 Valid, 8906 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:40:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6848 states. [2022-01-10 07:40:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6848 to 6844. [2022-01-10 07:40:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6844 states, 6513 states have (on average 1.4148625825272532) internal successors, (9215), 6529 states have internal predecessors, (9215), 173 states have call successors, (173), 145 states have call predecessors, (173), 156 states have return successors, (195), 171 states have call predecessors, (195), 171 states have call successors, (195) [2022-01-10 07:40:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6844 states to 6844 states and 9583 transitions. [2022-01-10 07:40:52,443 INFO L78 Accepts]: Start accepts. Automaton has 6844 states and 9583 transitions. Word has length 183 [2022-01-10 07:40:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:52,444 INFO L470 AbstractCegarLoop]: Abstraction has 6844 states and 9583 transitions. [2022-01-10 07:40:52,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 07:40:52,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6844 states and 9583 transitions. [2022-01-10 07:40:52,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-10 07:40:52,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:52,449 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:52,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-01-10 07:40:52,659 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 07:40:52,659 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:52,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:52,660 INFO L85 PathProgramCache]: Analyzing trace with hash 531810237, now seen corresponding path program 1 times [2022-01-10 07:40:52,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:52,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976775588] [2022-01-10 07:40:52,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:52,660 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:52,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:52,662 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 07:40:52,664 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 07:40:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:52,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:40:52,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 07:40:52,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:52,986 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:52,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976775588] [2022-01-10 07:40:52,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976775588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:52,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:52,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:40:52,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185866170] [2022-01-10 07:40:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:52,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:40:52,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:52,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:40:52,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:40:52,989 INFO L87 Difference]: Start difference. First operand 6844 states and 9583 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 07:40:53,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:53,414 INFO L93 Difference]: Finished difference Result 11542 states and 15166 transitions. [2022-01-10 07:40:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:40:53,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 183 [2022-01-10 07:40:53,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:53,429 INFO L225 Difference]: With dead ends: 11542 [2022-01-10 07:40:53,429 INFO L226 Difference]: Without dead ends: 6835 [2022-01-10 07:40:53,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 07:40:53,439 INFO L933 BasicCegarLoop]: 4277 mSDtfsCounter, 312 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 8235 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 07:40:53,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 8235 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6835 states. [2022-01-10 07:40:53,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6835 to 6835. [2022-01-10 07:40:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6835 states, 6507 states have (on average 1.4144767173812818) internal successors, (9204), 6522 states have internal predecessors, (9204), 170 states have call successors, (170), 145 states have call predecessors, (170), 156 states have return successors, (192), 168 states have call predecessors, (192), 168 states have call successors, (192) [2022-01-10 07:40:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6835 states to 6835 states and 9566 transitions. [2022-01-10 07:40:53,881 INFO L78 Accepts]: Start accepts. Automaton has 6835 states and 9566 transitions. Word has length 183 [2022-01-10 07:40:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:53,881 INFO L470 AbstractCegarLoop]: Abstraction has 6835 states and 9566 transitions. [2022-01-10 07:40:53,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 07:40:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6835 states and 9566 transitions. [2022-01-10 07:40:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-10 07:40:53,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:53,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:53,896 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 07:40:54,095 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 07:40:54,095 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash 306855216, now seen corresponding path program 1 times [2022-01-10 07:40:54,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:54,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232713605] [2022-01-10 07:40:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:54,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:54,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:54,098 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 07:40:54,099 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 07:40:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:40:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 07:40:54,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:54,575 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232713605] [2022-01-10 07:40:54,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232713605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:54,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:54,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:54,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811037747] [2022-01-10 07:40:54,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:54,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:40:54,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:54,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:40:54,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:40:54,577 INFO L87 Difference]: Start difference. First operand 6835 states and 9566 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 07:40:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:55,202 INFO L93 Difference]: Finished difference Result 15827 states and 20262 transitions. [2022-01-10 07:40:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:40:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 184 [2022-01-10 07:40:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:55,228 INFO L225 Difference]: With dead ends: 15827 [2022-01-10 07:40:55,228 INFO L226 Difference]: Without dead ends: 11129 [2022-01-10 07:40:55,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 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 07:40:55,240 INFO L933 BasicCegarLoop]: 4396 mSDtfsCounter, 4345 mSDsluCounter, 4470 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4351 SdHoareTripleChecker+Valid, 8866 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:55,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4351 Valid, 8866 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:40:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11129 states. [2022-01-10 07:40:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11129 to 11125. [2022-01-10 07:40:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11125 states, 10498 states have (on average 1.3282530005715374) internal successors, (13944), 10530 states have internal predecessors, (13944), 321 states have call successors, (321), 273 states have call predecessors, (321), 304 states have return successors, (387), 323 states have call predecessors, (387), 319 states have call successors, (387) [2022-01-10 07:40:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11125 states to 11125 states and 14652 transitions. [2022-01-10 07:40:55,848 INFO L78 Accepts]: Start accepts. Automaton has 11125 states and 14652 transitions. Word has length 184 [2022-01-10 07:40:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:55,849 INFO L470 AbstractCegarLoop]: Abstraction has 11125 states and 14652 transitions. [2022-01-10 07:40:55,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 07:40:55,849 INFO L276 IsEmpty]: Start isEmpty. Operand 11125 states and 14652 transitions. [2022-01-10 07:40:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-10 07:40:55,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:55,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:55,868 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 07:40:56,066 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 07:40:56,066 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:56,067 INFO L85 PathProgramCache]: Analyzing trace with hash -523798418, now seen corresponding path program 1 times [2022-01-10 07:40:56,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:56,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223487329] [2022-01-10 07:40:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:56,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:56,068 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 07:40:56,069 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 07:40:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:56,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:40:56,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 07:40:56,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:56,397 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:56,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223487329] [2022-01-10 07:40:56,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223487329] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:56,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:56,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:40:56,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727862230] [2022-01-10 07:40:56,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:56,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:40:56,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:56,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:40:56,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:40:56,398 INFO L87 Difference]: Start difference. First operand 11125 states and 14652 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 07:40:56,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:56,855 INFO L93 Difference]: Finished difference Result 20105 states and 25307 transitions. [2022-01-10 07:40:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:40:56,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 184 [2022-01-10 07:40:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:56,873 INFO L225 Difference]: With dead ends: 20105 [2022-01-10 07:40:56,874 INFO L226 Difference]: Without dead ends: 11117 [2022-01-10 07:40:56,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 182 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 07:40:56,888 INFO L933 BasicCegarLoop]: 4276 mSDtfsCounter, 310 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 8234 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 07:40:56,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 8234 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:40:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11117 states. [2022-01-10 07:40:57,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11117 to 11117. [2022-01-10 07:40:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11117 states, 10493 states have (on average 1.3280282092823787) internal successors, (13935), 10524 states have internal predecessors, (13935), 318 states have call successors, (318), 273 states have call predecessors, (318), 304 states have return successors, (384), 320 states have call predecessors, (384), 316 states have call successors, (384) [2022-01-10 07:40:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11117 states to 11117 states and 14637 transitions. [2022-01-10 07:40:57,539 INFO L78 Accepts]: Start accepts. Automaton has 11117 states and 14637 transitions. Word has length 184 [2022-01-10 07:40:57,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:40:57,540 INFO L470 AbstractCegarLoop]: Abstraction has 11117 states and 14637 transitions. [2022-01-10 07:40:57,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 07:40:57,540 INFO L276 IsEmpty]: Start isEmpty. Operand 11117 states and 14637 transitions. [2022-01-10 07:40:57,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 07:40:57,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:40:57,546 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:40:57,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 07:40:57,756 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 07:40:57,756 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:40:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:40:57,757 INFO L85 PathProgramCache]: Analyzing trace with hash -16409573, now seen corresponding path program 1 times [2022-01-10 07:40:57,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:40:57,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208267844] [2022-01-10 07:40:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:40:57,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:40:57,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:40:57,759 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 07:40:57,761 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 07:40:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:40:57,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:40:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:40:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 07:40:58,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:40:58,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:40:58,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208267844] [2022-01-10 07:40:58,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208267844] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:40:58,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:40:58,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:40:58,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770423023] [2022-01-10 07:40:58,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:40:58,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:40:58,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:40:58,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:40:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:40:58,189 INFO L87 Difference]: Start difference. First operand 11117 states and 14637 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 07:40:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:40:59,263 INFO L93 Difference]: Finished difference Result 28272 states and 35007 transitions. [2022-01-10 07:40:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:40:59,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 185 [2022-01-10 07:40:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:40:59,294 INFO L225 Difference]: With dead ends: 28272 [2022-01-10 07:40:59,294 INFO L226 Difference]: Without dead ends: 19292 [2022-01-10 07:40:59,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 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 07:40:59,310 INFO L933 BasicCegarLoop]: 4385 mSDtfsCounter, 4338 mSDsluCounter, 4447 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4344 SdHoareTripleChecker+Valid, 8832 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:40:59,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4344 Valid, 8832 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:40:59,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19292 states. [2022-01-10 07:41:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19292 to 19288. [2022-01-10 07:41:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19288 states, 18093 states have (on average 1.2686121704526612) internal successors, (22953), 18161 states have internal predecessors, (22953), 601 states have call successors, (601), 513 states have call predecessors, (601), 592 states have return successors, (763), 615 states have call predecessors, (763), 599 states have call successors, (763) [2022-01-10 07:41:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19288 states to 19288 states and 24317 transitions. [2022-01-10 07:41:00,353 INFO L78 Accepts]: Start accepts. Automaton has 19288 states and 24317 transitions. Word has length 185 [2022-01-10 07:41:00,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:41:00,354 INFO L470 AbstractCegarLoop]: Abstraction has 19288 states and 24317 transitions. [2022-01-10 07:41:00,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 07:41:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 19288 states and 24317 transitions. [2022-01-10 07:41:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 07:41:00,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:41:00,364 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:00,377 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 07:41:00,574 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 07:41:00,574 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:41:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:41:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash -847063207, now seen corresponding path program 1 times [2022-01-10 07:41:00,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:41:00,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160593337] [2022-01-10 07:41:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:41:00,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:41:00,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:41:00,576 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 07:41:00,577 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 07:41:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:41:00,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:41:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:41:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 07:41:00,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:41:00,874 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:41:00,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160593337] [2022-01-10 07:41:00,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160593337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:41:00,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:41:00,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:41:00,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907187285] [2022-01-10 07:41:00,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:41:00,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:41:00,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:41:00,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:41:00,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:41:00,876 INFO L87 Difference]: Start difference. First operand 19288 states and 24317 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 07:41:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:41:01,843 INFO L93 Difference]: Finished difference Result 36432 states and 44640 transitions. [2022-01-10 07:41:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:41:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 185 [2022-01-10 07:41:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:41:01,890 INFO L225 Difference]: With dead ends: 36432 [2022-01-10 07:41:01,891 INFO L226 Difference]: Without dead ends: 19281 [2022-01-10 07:41:01,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 183 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 07:41:01,912 INFO L933 BasicCegarLoop]: 4275 mSDtfsCounter, 308 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 8233 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 07:41:01,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 8233 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:41:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19281 states. [2022-01-10 07:41:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19281 to 19281. [2022-01-10 07:41:02,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19281 states, 18089 states have (on average 1.268505721709326) internal successors, (22946), 18156 states have internal predecessors, (22946), 598 states have call successors, (598), 513 states have call predecessors, (598), 592 states have return successors, (760), 612 states have call predecessors, (760), 596 states have call successors, (760) [2022-01-10 07:41:02,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19281 states to 19281 states and 24304 transitions. [2022-01-10 07:41:02,899 INFO L78 Accepts]: Start accepts. Automaton has 19281 states and 24304 transitions. Word has length 185 [2022-01-10 07:41:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:41:02,900 INFO L470 AbstractCegarLoop]: Abstraction has 19281 states and 24304 transitions. [2022-01-10 07:41:02,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 07:41:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 19281 states and 24304 transitions. [2022-01-10 07:41:02,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-10 07:41:02,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:41:02,909 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:02,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 07:41:03,119 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 07:41:03,120 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:41:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:41:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1121517972, now seen corresponding path program 1 times [2022-01-10 07:41:03,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:41:03,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578084240] [2022-01-10 07:41:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:41:03,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:41:03,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:41:03,122 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 07:41:03,123 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 07:41:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:41:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:41:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:41:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 07:41:03,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:41:03,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:41:03,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578084240] [2022-01-10 07:41:03,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578084240] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:41:03,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:41:03,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:41:03,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311248134] [2022-01-10 07:41:03,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:41:03,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:41:03,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:41:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:41:03,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:41:03,529 INFO L87 Difference]: Start difference. First operand 19281 states and 24304 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 07:41:05,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:41:05,592 INFO L93 Difference]: Finished difference Result 56015 states and 67641 transitions. [2022-01-10 07:41:05,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 07:41:05,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 186 [2022-01-10 07:41:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:41:05,674 INFO L225 Difference]: With dead ends: 56015 [2022-01-10 07:41:05,674 INFO L226 Difference]: Without dead ends: 38871 [2022-01-10 07:41:05,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 184 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 07:41:05,703 INFO L933 BasicCegarLoop]: 4387 mSDtfsCounter, 4342 mSDsluCounter, 4429 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4348 SdHoareTripleChecker+Valid, 8816 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 07:41:05,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4348 Valid, 8816 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 07:41:05,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38871 states. [2022-01-10 07:41:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38871 to 38099. [2022-01-10 07:41:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38099 states, 35464 states have (on average 1.2230430859463117) internal successors, (43374), 35804 states have internal predecessors, (43374), 1129 states have call successors, (1129), 961 states have call predecessors, (1129), 1504 states have return successors, (1868), 1335 states have call predecessors, (1868), 1127 states have call successors, (1868) [2022-01-10 07:41:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38099 states to 38099 states and 46371 transitions. [2022-01-10 07:41:08,076 INFO L78 Accepts]: Start accepts. Automaton has 38099 states and 46371 transitions. Word has length 186 [2022-01-10 07:41:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:41:08,076 INFO L470 AbstractCegarLoop]: Abstraction has 38099 states and 46371 transitions. [2022-01-10 07:41:08,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 07:41:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 38099 states and 46371 transitions. [2022-01-10 07:41:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-10 07:41:08,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:41:08,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:08,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-01-10 07:41:08,290 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 07:41:08,291 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:41:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:41:08,291 INFO L85 PathProgramCache]: Analyzing trace with hash 290864338, now seen corresponding path program 1 times [2022-01-10 07:41:08,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:41:08,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099858121] [2022-01-10 07:41:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:41:08,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:41:08,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:41:08,293 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 07:41:08,294 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 07:41:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:41:08,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 07:41:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:41:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-01-10 07:41:08,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:41:08,637 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:41:08,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099858121] [2022-01-10 07:41:08,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099858121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:41:08,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:41:08,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 07:41:08,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834915069] [2022-01-10 07:41:08,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:41:08,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 07:41:08,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:41:08,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 07:41:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 07:41:08,638 INFO L87 Difference]: Start difference. First operand 38099 states and 46371 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 07:41:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 07:41:10,783 INFO L93 Difference]: Finished difference Result 74056 states and 88752 transitions. [2022-01-10 07:41:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 07:41:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 186 [2022-01-10 07:41:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 07:41:10,851 INFO L225 Difference]: With dead ends: 74056 [2022-01-10 07:41:10,851 INFO L226 Difference]: Without dead ends: 38093 [2022-01-10 07:41:10,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 184 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 07:41:10,892 INFO L933 BasicCegarLoop]: 4274 mSDtfsCounter, 306 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 8232 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 07:41:10,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 8232 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 07:41:10,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38093 states. [2022-01-10 07:41:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38093 to 38093. [2022-01-10 07:41:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38093 states, 35461 states have (on average 1.223005555398889) internal successors, (43369), 35800 states have internal predecessors, (43369), 1126 states have call successors, (1126), 961 states have call predecessors, (1126), 1504 states have return successors, (1864), 1332 states have call predecessors, (1864), 1124 states have call successors, (1864) [2022-01-10 07:41:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38093 states to 38093 states and 46359 transitions. [2022-01-10 07:41:13,321 INFO L78 Accepts]: Start accepts. Automaton has 38093 states and 46359 transitions. Word has length 186 [2022-01-10 07:41:13,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 07:41:13,322 INFO L470 AbstractCegarLoop]: Abstraction has 38093 states and 46359 transitions. [2022-01-10 07:41:13,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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 07:41:13,322 INFO L276 IsEmpty]: Start isEmpty. Operand 38093 states and 46359 transitions. [2022-01-10 07:41:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-10 07:41:13,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 07:41:13,335 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:41:13,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 07:41:13,535 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 07:41:13,535 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 07:41:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 07:41:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1150579639, now seen corresponding path program 1 times [2022-01-10 07:41:13,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 07:41:13,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378119638] [2022-01-10 07:41:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 07:41:13,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 07:41:13,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 07:41:13,537 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 07:41:13,538 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 07:41:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 07:41:13,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 07:41:13,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 07:41:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-01-10 07:41:13,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 07:41:13,937 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 07:41:13,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378119638] [2022-01-10 07:41:13,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378119638] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 07:41:13,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 07:41:13,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 07:41:13,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91358331] [2022-01-10 07:41:13,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 07:41:13,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 07:41:13,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 07:41:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 07:41:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 07:41:13,938 INFO L87 Difference]: Start difference. First operand 38093 states and 46359 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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)