/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/systemc/kundu2.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 06:41:02,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 06:41:02,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 06:41:02,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 06:41:02,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 06:41:02,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 06:41:02,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 06:41:02,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 06:41:03,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 06:41:03,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 06:41:03,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 06:41:03,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 06:41:03,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 06:41:03,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 06:41:03,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 06:41:03,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 06:41:03,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 06:41:03,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 06:41:03,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 06:41:03,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 06:41:03,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 06:41:03,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 06:41:03,022 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 06:41:03,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 06:41:03,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 06:41:03,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 06:41:03,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 06:41:03,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 06:41:03,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 06:41:03,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 06:41:03,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 06:41:03,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 06:41:03,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 06:41:03,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 06:41:03,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 06:41:03,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 06:41:03,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 06:41:03,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 06:41:03,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 06:41:03,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 06:41:03,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 06:41:03,035 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 06:41:03,052 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 06:41:03,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 06:41:03,053 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 06:41:03,053 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 06:41:03,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 06:41:03,054 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 06:41:03,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 06:41:03,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 06:41:03,055 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 06:41:03,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 06:41:03,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 06:41:03,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 06:41:03,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 06:41:03,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 06:41:03,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 06:41:03,056 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 06:41:03,056 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 06:41:03,056 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 06:41:03,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 06:41:03,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 06:41:03,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 06:41:03,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 06:41:03,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 06:41:03,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:41:03,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 06:41:03,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 06:41:03,057 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 06:41:03,057 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 06:41:03,057 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 06:41:03,057 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 06:41:03,058 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 06:41:03,058 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 06:41:03,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 06:41:03,058 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 06:41:03,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 06:41:03,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 06:41:03,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 06:41:03,289 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 06:41:03,290 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 06:41:03,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/kundu2.cil.c [2022-01-10 06:41:03,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337eae46d/cb6d844e49474921808ff82a9bff1b8c/FLAG8391a53c5 [2022-01-10 06:41:03,743 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 06:41:03,743 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu2.cil.c [2022-01-10 06:41:03,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337eae46d/cb6d844e49474921808ff82a9bff1b8c/FLAG8391a53c5 [2022-01-10 06:41:03,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/337eae46d/cb6d844e49474921808ff82a9bff1b8c [2022-01-10 06:41:03,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 06:41:03,770 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 06:41:03,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 06:41:03,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 06:41:03,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 06:41:03,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:41:03" (1/1) ... [2022-01-10 06:41:03,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ebc588e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:03, skipping insertion in model container [2022-01-10 06:41:03,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 06:41:03" (1/1) ... [2022-01-10 06:41:03,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 06:41:03,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 06:41:03,958 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu2.cil.c[636,649] [2022-01-10 06:41:04,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:41:04,049 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 06:41:04,058 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/systemc/kundu2.cil.c[636,649] [2022-01-10 06:41:04,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 06:41:04,104 INFO L208 MainTranslator]: Completed translation [2022-01-10 06:41:04,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04 WrapperNode [2022-01-10 06:41:04,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 06:41:04,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 06:41:04,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 06:41:04,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 06:41:04,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,122 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,163 INFO L137 Inliner]: procedures = 34, calls = 40, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 299 [2022-01-10 06:41:04,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 06:41:04,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 06:41:04,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 06:41:04,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 06:41:04,174 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 06:41:04,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 06:41:04,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 06:41:04,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 06:41:04,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (1/1) ... [2022-01-10 06:41:04,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 06:41:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 06:41:04,279 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 06:41:04,285 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 06:41:04,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 06:41:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure write_data [2022-01-10 06:41:04,314 INFO L138 BoogieDeclarations]: Found implementation of procedure write_data [2022-01-10 06:41:04,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 06:41:04,315 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-01-10 06:41:04,315 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-01-10 06:41:04,315 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-01-10 06:41:04,315 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-01-10 06:41:04,316 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-01-10 06:41:04,317 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-01-10 06:41:04,320 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-01-10 06:41:04,320 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-01-10 06:41:04,321 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-01-10 06:41:04,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-01-10 06:41:04,321 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-01-10 06:41:04,321 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-01-10 06:41:04,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 06:41:04,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 06:41:04,394 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 06:41:04,395 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 06:41:04,713 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 06:41:04,721 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 06:41:04,722 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-10 06:41:04,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:41:04 BoogieIcfgContainer [2022-01-10 06:41:04,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 06:41:04,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 06:41:04,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 06:41:04,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 06:41:04,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 06:41:03" (1/3) ... [2022-01-10 06:41:04,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b782246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:41:04, skipping insertion in model container [2022-01-10 06:41:04,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 06:41:04" (2/3) ... [2022-01-10 06:41:04,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b782246 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 06:41:04, skipping insertion in model container [2022-01-10 06:41:04,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 06:41:04" (3/3) ... [2022-01-10 06:41:04,748 INFO L111 eAbstractionObserver]: Analyzing ICFG kundu2.cil.c [2022-01-10 06:41:04,758 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 06:41:04,758 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 06:41:04,812 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 06:41:04,819 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 06:41:04,819 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 06:41:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 107 states have (on average 1.514018691588785) internal successors, (162), 111 states have internal predecessors, (162), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-01-10 06:41:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:41:04,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:04,857 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] [2022-01-10 06:41:04,858 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:04,863 INFO L85 PathProgramCache]: Analyzing trace with hash 734266899, now seen corresponding path program 1 times [2022-01-10 06:41:04,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:04,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983503971] [2022-01-10 06:41:04,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:04,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:04,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:04,879 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 06:41:04,880 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 06:41:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:04,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:05,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:05,147 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 06:41:05,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:05,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:05,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983503971] [2022-01-10 06:41:05,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983503971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:05,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:05,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:05,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250549114] [2022-01-10 06:41:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:05,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:05,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:05,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:05,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:05,182 INFO L87 Difference]: Start difference. First operand has 134 states, 107 states have (on average 1.514018691588785) internal successors, (162), 111 states have internal predecessors, (162), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:05,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:05,234 INFO L93 Difference]: Finished difference Result 259 states and 388 transitions. [2022-01-10 06:41:05,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:05,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:41:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:05,246 INFO L225 Difference]: With dead ends: 259 [2022-01-10 06:41:05,246 INFO L226 Difference]: Without dead ends: 127 [2022-01-10 06:41:05,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 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 06:41:05,253 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 177 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 183 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 06:41:05,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 183 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-10 06:41:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-01-10 06:41:05,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 105 states have internal predecessors, (147), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-10 06:41:05,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 180 transitions. [2022-01-10 06:41:05,319 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 180 transitions. Word has length 59 [2022-01-10 06:41:05,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:05,320 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 180 transitions. [2022-01-10 06:41:05,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 180 transitions. [2022-01-10 06:41:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:41:05,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:05,324 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] [2022-01-10 06:41:05,334 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 06:41:05,524 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 06:41:05,525 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:05,526 INFO L85 PathProgramCache]: Analyzing trace with hash -804073131, now seen corresponding path program 1 times [2022-01-10 06:41:05,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:05,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331407005] [2022-01-10 06:41:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:05,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:05,528 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 06:41:05,530 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 06:41:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:05,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:05,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:05,737 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 06:41:05,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:05,737 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:05,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331407005] [2022-01-10 06:41:05,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331407005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:05,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:05,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:05,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177875240] [2022-01-10 06:41:05,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:05,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:05,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:05,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:05,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:05,747 INFO L87 Difference]: Start difference. First operand 127 states and 180 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:05,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:05,797 INFO L93 Difference]: Finished difference Result 356 states and 506 transitions. [2022-01-10 06:41:05,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:05,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:41:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:05,806 INFO L225 Difference]: With dead ends: 356 [2022-01-10 06:41:05,806 INFO L226 Difference]: Without dead ends: 240 [2022-01-10 06:41:05,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 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 06:41:05,809 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 157 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:05,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 376 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:05,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-10 06:41:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 234. [2022-01-10 06:41:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 192 states have (on average 1.4375) internal successors, (276), 196 states have internal predecessors, (276), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 06:41:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 331 transitions. [2022-01-10 06:41:05,852 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 331 transitions. Word has length 59 [2022-01-10 06:41:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:05,852 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 331 transitions. [2022-01-10 06:41:05,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 331 transitions. [2022-01-10 06:41:05,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:41:05,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:05,860 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] [2022-01-10 06:41:05,874 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 06:41:06,068 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 06:41:06,068 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:06,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1094457174, now seen corresponding path program 1 times [2022-01-10 06:41:06,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:06,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215105721] [2022-01-10 06:41:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:06,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:06,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:06,072 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 06:41:06,074 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 06:41:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:06,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:06,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:06,285 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 06:41:06,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:06,286 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:06,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215105721] [2022-01-10 06:41:06,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215105721] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:06,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:06,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:06,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216564568] [2022-01-10 06:41:06,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:06,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:06,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:06,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:06,293 INFO L87 Difference]: Start difference. First operand 234 states and 331 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:06,354 INFO L93 Difference]: Finished difference Result 496 states and 713 transitions. [2022-01-10 06:41:06,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:41:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:41:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:06,362 INFO L225 Difference]: With dead ends: 496 [2022-01-10 06:41:06,362 INFO L226 Difference]: Without dead ends: 273 [2022-01-10 06:41:06,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 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 06:41:06,369 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 106 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 779 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 06:41:06,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 779 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-10 06:41:06,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 237. [2022-01-10 06:41:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 195 states have (on average 1.4256410256410257) internal successors, (278), 199 states have internal predecessors, (278), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 06:41:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 333 transitions. [2022-01-10 06:41:06,399 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 333 transitions. Word has length 59 [2022-01-10 06:41:06,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:06,399 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 333 transitions. [2022-01-10 06:41:06,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 333 transitions. [2022-01-10 06:41:06,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:41:06,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:06,400 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] [2022-01-10 06:41:06,415 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 06:41:06,609 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 06:41:06,610 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash -750909992, now seen corresponding path program 1 times [2022-01-10 06:41:06,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:06,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186136900] [2022-01-10 06:41:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:06,611 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:06,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:06,612 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 06:41:06,615 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 06:41:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:06,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:06,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:06,775 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 06:41:06,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:06,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:06,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186136900] [2022-01-10 06:41:06,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186136900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:06,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:06,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:06,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541666219] [2022-01-10 06:41:06,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:06,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:06,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:06,778 INFO L87 Difference]: Start difference. First operand 237 states and 333 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:06,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:06,825 INFO L93 Difference]: Finished difference Result 513 states and 739 transitions. [2022-01-10 06:41:06,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:41:06,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:41:06,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:06,831 INFO L225 Difference]: With dead ends: 513 [2022-01-10 06:41:06,831 INFO L226 Difference]: Without dead ends: 287 [2022-01-10 06:41:06,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 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 06:41:06,837 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 66 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 735 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 06:41:06,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 735 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:06,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-10 06:41:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 243. [2022-01-10 06:41:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 201 states have (on average 1.4129353233830846) internal successors, (284), 205 states have internal predecessors, (284), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-10 06:41:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 339 transitions. [2022-01-10 06:41:06,855 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 339 transitions. Word has length 59 [2022-01-10 06:41:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:06,856 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 339 transitions. [2022-01-10 06:41:06,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 339 transitions. [2022-01-10 06:41:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 06:41:06,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:06,857 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] [2022-01-10 06:41:06,868 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 06:41:07,065 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 06:41:07,066 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:07,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash -823296550, now seen corresponding path program 1 times [2022-01-10 06:41:07,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:07,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462659177] [2022-01-10 06:41:07,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:07,067 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:07,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:07,068 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 06:41:07,070 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 06:41:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:07,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:07,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:07,228 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 06:41:07,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:07,229 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:07,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462659177] [2022-01-10 06:41:07,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462659177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:07,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:07,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:07,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206393141] [2022-01-10 06:41:07,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:07,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:07,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:07,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:07,231 INFO L87 Difference]: Start difference. First operand 243 states and 339 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:07,297 INFO L93 Difference]: Finished difference Result 698 states and 974 transitions. [2022-01-10 06:41:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:07,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-01-10 06:41:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:07,300 INFO L225 Difference]: With dead ends: 698 [2022-01-10 06:41:07,300 INFO L226 Difference]: Without dead ends: 466 [2022-01-10 06:41:07,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 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 06:41:07,302 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 139 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:07,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 364 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-10 06:41:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 445. [2022-01-10 06:41:07,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 369 states have (on average 1.3848238482384825) internal successors, (511), 374 states have internal predecessors, (511), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-10 06:41:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 610 transitions. [2022-01-10 06:41:07,324 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 610 transitions. Word has length 59 [2022-01-10 06:41:07,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:07,324 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 610 transitions. [2022-01-10 06:41:07,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 610 transitions. [2022-01-10 06:41:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 06:41:07,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:07,325 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] [2022-01-10 06:41:07,337 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 06:41:07,535 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 06:41:07,535 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 225843183, now seen corresponding path program 1 times [2022-01-10 06:41:07,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:07,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791470486] [2022-01-10 06:41:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:07,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:07,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:07,538 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 06:41:07,539 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 06:41:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:07,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:07,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:07,678 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 06:41:07,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:07,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:07,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791470486] [2022-01-10 06:41:07,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791470486] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:07,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:07,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:07,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640868402] [2022-01-10 06:41:07,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:07,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:07,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:07,680 INFO L87 Difference]: Start difference. First operand 445 states and 610 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:07,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:07,726 INFO L93 Difference]: Finished difference Result 893 states and 1241 transitions. [2022-01-10 06:41:07,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:41:07,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2022-01-10 06:41:07,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:07,729 INFO L225 Difference]: With dead ends: 893 [2022-01-10 06:41:07,729 INFO L226 Difference]: Without dead ends: 459 [2022-01-10 06:41:07,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 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 06:41:07,731 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 10 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:07,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 722 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-10 06:41:07,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 451. [2022-01-10 06:41:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 375 states have (on average 1.3733333333333333) internal successors, (515), 380 states have internal predecessors, (515), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2022-01-10 06:41:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 614 transitions. [2022-01-10 06:41:07,755 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 614 transitions. Word has length 60 [2022-01-10 06:41:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:07,755 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 614 transitions. [2022-01-10 06:41:07,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 06:41:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 614 transitions. [2022-01-10 06:41:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-10 06:41:07,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:07,756 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] [2022-01-10 06:41:07,769 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 06:41:07,965 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 06:41:07,965 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2145896079, now seen corresponding path program 1 times [2022-01-10 06:41:07,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:07,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020908432] [2022-01-10 06:41:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:07,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:07,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:07,968 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 06:41:07,970 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 06:41:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:08,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:08,152 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 06:41:08,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:08,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:08,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020908432] [2022-01-10 06:41:08,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020908432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:08,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:08,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:08,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708181862] [2022-01-10 06:41:08,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:08,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:08,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:08,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:08,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:08,154 INFO L87 Difference]: Start difference. First operand 451 states and 614 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 06:41:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:08,238 INFO L93 Difference]: Finished difference Result 1300 states and 1772 transitions. [2022-01-10 06:41:08,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 06:41:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-01-10 06:41:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:08,243 INFO L225 Difference]: With dead ends: 1300 [2022-01-10 06:41:08,244 INFO L226 Difference]: Without dead ends: 861 [2022-01-10 06:41:08,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 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 06:41:08,246 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 104 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:08,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 723 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-10 06:41:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 845. [2022-01-10 06:41:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 705 states have (on average 1.3659574468085107) internal successors, (963), 718 states have internal predecessors, (963), 91 states have call successors, (91), 49 states have call predecessors, (91), 48 states have return successors, (88), 78 states have call predecessors, (88), 88 states have call successors, (88) [2022-01-10 06:41:08,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1142 transitions. [2022-01-10 06:41:08,289 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1142 transitions. Word has length 60 [2022-01-10 06:41:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:08,289 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1142 transitions. [2022-01-10 06:41:08,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 06:41:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1142 transitions. [2022-01-10 06:41:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-10 06:41:08,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:08,291 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:08,303 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 06:41:08,499 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 06:41:08,500 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:08,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:08,500 INFO L85 PathProgramCache]: Analyzing trace with hash 370475399, now seen corresponding path program 1 times [2022-01-10 06:41:08,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909227133] [2022-01-10 06:41:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:08,501 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:08,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:08,502 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 06:41:08,503 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 06:41:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:08,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:41:08,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:08,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:08,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909227133] [2022-01-10 06:41:08,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909227133] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:41:08,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:41:08,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-01-10 06:41:08,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370795894] [2022-01-10 06:41:08,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:08,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:08,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:08,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:08,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:08,857 INFO L87 Difference]: Start difference. First operand 845 states and 1142 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:41:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:09,082 INFO L93 Difference]: Finished difference Result 2538 states and 3443 transitions. [2022-01-10 06:41:09,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:41:09,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2022-01-10 06:41:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:09,092 INFO L225 Difference]: With dead ends: 2538 [2022-01-10 06:41:09,092 INFO L226 Difference]: Without dead ends: 1705 [2022-01-10 06:41:09,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:41:09,096 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 289 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:09,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 1321 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:09,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-01-10 06:41:09,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1675. [2022-01-10 06:41:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1403 states have (on average 1.3635067712045617) internal successors, (1913), 1426 states have internal predecessors, (1913), 175 states have call successors, (175), 97 states have call predecessors, (175), 96 states have return successors, (172), 152 states have call predecessors, (172), 172 states have call successors, (172) [2022-01-10 06:41:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 2260 transitions. [2022-01-10 06:41:09,207 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 2260 transitions. Word has length 71 [2022-01-10 06:41:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:09,208 INFO L470 AbstractCegarLoop]: Abstraction has 1675 states and 2260 transitions. [2022-01-10 06:41:09,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 5 states have internal predecessors, (57), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:41:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 2260 transitions. [2022-01-10 06:41:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 06:41:09,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:09,213 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] [2022-01-10 06:41:09,226 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 06:41:09,422 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 06:41:09,423 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:09,424 INFO L85 PathProgramCache]: Analyzing trace with hash 789227481, now seen corresponding path program 1 times [2022-01-10 06:41:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:09,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270239681] [2022-01-10 06:41:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:09,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:09,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:09,426 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 06:41:09,428 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 06:41:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:09,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:09,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:09,621 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 06:41:09,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:09,622 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:09,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270239681] [2022-01-10 06:41:09,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270239681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:09,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:09,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:41:09,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413281990] [2022-01-10 06:41:09,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:09,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:41:09,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:41:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:41:09,624 INFO L87 Difference]: Start difference. First operand 1675 states and 2260 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:09,863 INFO L93 Difference]: Finished difference Result 5038 states and 6834 transitions. [2022-01-10 06:41:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:41:09,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-01-10 06:41:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:09,881 INFO L225 Difference]: With dead ends: 5038 [2022-01-10 06:41:09,881 INFO L226 Difference]: Without dead ends: 3375 [2022-01-10 06:41:09,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 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 06:41:09,888 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 175 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:09,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 545 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:09,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2022-01-10 06:41:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 3308. [2022-01-10 06:41:10,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 2793 states have (on average 1.3333333333333333) internal successors, (3724), 2837 states have internal predecessors, (3724), 314 states have call successors, (314), 185 states have call predecessors, (314), 200 states have return successors, (400), 287 states have call predecessors, (400), 311 states have call successors, (400) [2022-01-10 06:41:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 4438 transitions. [2022-01-10 06:41:10,080 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 4438 transitions. Word has length 74 [2022-01-10 06:41:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:10,080 INFO L470 AbstractCegarLoop]: Abstraction has 3308 states and 4438 transitions. [2022-01-10 06:41:10,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:10,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 4438 transitions. [2022-01-10 06:41:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-10 06:41:10,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:10,082 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] [2022-01-10 06:41:10,091 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 06:41:10,290 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 06:41:10,291 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash 57260055, now seen corresponding path program 1 times [2022-01-10 06:41:10,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:10,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505486143] [2022-01-10 06:41:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:10,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:10,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:10,293 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 06:41:10,296 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 06:41:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:10,445 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 06:41:10,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:10,445 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:10,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505486143] [2022-01-10 06:41:10,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505486143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:10,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:10,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:10,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675415041] [2022-01-10 06:41:10,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:10,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:10,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:10,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:10,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:10,447 INFO L87 Difference]: Start difference. First operand 3308 states and 4438 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:10,566 INFO L93 Difference]: Finished difference Result 6600 states and 8850 transitions. [2022-01-10 06:41:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2022-01-10 06:41:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:10,585 INFO L225 Difference]: With dead ends: 6600 [2022-01-10 06:41:10,585 INFO L226 Difference]: Without dead ends: 3303 [2022-01-10 06:41:10,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 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 06:41:10,596 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 171 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 178 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 06:41:10,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 178 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2022-01-10 06:41:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 3303. [2022-01-10 06:41:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 2791 states have (on average 1.3328556073092082) internal successors, (3720), 2834 states have internal predecessors, (3720), 311 states have call successors, (311), 185 states have call predecessors, (311), 200 states have return successors, (396), 284 states have call predecessors, (396), 308 states have call successors, (396) [2022-01-10 06:41:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 4427 transitions. [2022-01-10 06:41:10,772 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 4427 transitions. Word has length 74 [2022-01-10 06:41:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:10,773 INFO L470 AbstractCegarLoop]: Abstraction has 3303 states and 4427 transitions. [2022-01-10 06:41:10,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:10,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 4427 transitions. [2022-01-10 06:41:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-10 06:41:10,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:10,774 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] [2022-01-10 06:41:10,790 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 06:41:10,983 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 06:41:10,984 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:10,984 INFO L85 PathProgramCache]: Analyzing trace with hash -728024876, now seen corresponding path program 1 times [2022-01-10 06:41:10,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:10,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734008336] [2022-01-10 06:41:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:10,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:10,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:10,986 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 06:41:10,988 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 06:41:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:41:11,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:11,194 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 06:41:11,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:11,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:11,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734008336] [2022-01-10 06:41:11,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734008336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:11,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:11,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 06:41:11,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749143281] [2022-01-10 06:41:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:11,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:11,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:11,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:11,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 06:41:11,197 INFO L87 Difference]: Start difference. First operand 3303 states and 4427 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:41:11,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:11,559 INFO L93 Difference]: Finished difference Result 7856 states and 10816 transitions. [2022-01-10 06:41:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:41:11,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 75 [2022-01-10 06:41:11,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:11,585 INFO L225 Difference]: With dead ends: 7856 [2022-01-10 06:41:11,585 INFO L226 Difference]: Without dead ends: 4565 [2022-01-10 06:41:11,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 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 06:41:11,598 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 392 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1434 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:11,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 1434 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 06:41:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4565 states. [2022-01-10 06:41:11,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4565 to 3299. [2022-01-10 06:41:11,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3299 states, 2787 states have (on average 1.3304628632938644) internal successors, (3708), 2830 states have internal predecessors, (3708), 311 states have call successors, (311), 185 states have call predecessors, (311), 200 states have return successors, (396), 284 states have call predecessors, (396), 308 states have call successors, (396) [2022-01-10 06:41:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3299 states to 3299 states and 4415 transitions. [2022-01-10 06:41:11,789 INFO L78 Accepts]: Start accepts. Automaton has 3299 states and 4415 transitions. Word has length 75 [2022-01-10 06:41:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:11,790 INFO L470 AbstractCegarLoop]: Abstraction has 3299 states and 4415 transitions. [2022-01-10 06:41:11,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-10 06:41:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3299 states and 4415 transitions. [2022-01-10 06:41:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-10 06:41:11,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:11,792 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:11,807 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 06:41:12,000 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 06:41:12,001 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:12,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:12,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1139883952, now seen corresponding path program 1 times [2022-01-10 06:41:12,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:12,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823234027] [2022-01-10 06:41:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:12,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:12,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:12,003 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 06:41:12,004 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 06:41:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 06:41:12,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:12,187 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:12,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823234027] [2022-01-10 06:41:12,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823234027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:12,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:12,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:41:12,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866138987] [2022-01-10 06:41:12,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:12,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:41:12,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:41:12,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:41:12,189 INFO L87 Difference]: Start difference. First operand 3299 states and 4415 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:41:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:12,589 INFO L93 Difference]: Finished difference Result 10015 states and 13533 transitions. [2022-01-10 06:41:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:41:12,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 79 [2022-01-10 06:41:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:12,620 INFO L225 Difference]: With dead ends: 10015 [2022-01-10 06:41:12,621 INFO L226 Difference]: Without dead ends: 6728 [2022-01-10 06:41:12,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 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 06:41:12,632 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 206 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:12,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 435 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:12,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6728 states. [2022-01-10 06:41:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6728 to 6723. [2022-01-10 06:41:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6723 states, 5715 states have (on average 1.3060367454068242) internal successors, (7464), 5806 states have internal predecessors, (7464), 591 states have call successors, (591), 361 states have call predecessors, (591), 416 states have return successors, (868), 556 states have call predecessors, (868), 588 states have call successors, (868) [2022-01-10 06:41:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 8923 transitions. [2022-01-10 06:41:13,006 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 8923 transitions. Word has length 79 [2022-01-10 06:41:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:13,006 INFO L470 AbstractCegarLoop]: Abstraction has 6723 states and 8923 transitions. [2022-01-10 06:41:13,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-01-10 06:41:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 8923 transitions. [2022-01-10 06:41:13,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-10 06:41:13,010 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:13,010 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:13,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-01-10 06:41:13,218 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 06:41:13,218 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:13,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:13,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1412022136, now seen corresponding path program 1 times [2022-01-10 06:41:13,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:13,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726218400] [2022-01-10 06:41:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:13,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:13,220 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 06:41:13,221 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 06:41:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:13,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:13,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:13,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:13,395 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:13,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726218400] [2022-01-10 06:41:13,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726218400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:13,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:13,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:13,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99854584] [2022-01-10 06:41:13,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:13,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:13,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:13,397 INFO L87 Difference]: Start difference. First operand 6723 states and 8923 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:13,853 INFO L93 Difference]: Finished difference Result 18483 states and 24676 transitions. [2022-01-10 06:41:13,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:13,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2022-01-10 06:41:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:13,926 INFO L225 Difference]: With dead ends: 18483 [2022-01-10 06:41:13,927 INFO L226 Difference]: Without dead ends: 11772 [2022-01-10 06:41:13,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 79 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 06:41:13,951 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 127 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:13,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 478 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11772 states. [2022-01-10 06:41:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11772 to 11769. [2022-01-10 06:41:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11769 states, 9945 states have (on average 1.2929110105580695) internal successors, (12858), 10105 states have internal predecessors, (12858), 1070 states have call successors, (1070), 654 states have call predecessors, (1070), 753 states have return successors, (1712), 1011 states have call predecessors, (1712), 1067 states have call successors, (1712) [2022-01-10 06:41:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11769 states to 11769 states and 15640 transitions. [2022-01-10 06:41:14,550 INFO L78 Accepts]: Start accepts. Automaton has 11769 states and 15640 transitions. Word has length 81 [2022-01-10 06:41:14,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:14,550 INFO L470 AbstractCegarLoop]: Abstraction has 11769 states and 15640 transitions. [2022-01-10 06:41:14,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-10 06:41:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 11769 states and 15640 transitions. [2022-01-10 06:41:14,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-10 06:41:14,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:14,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:14,567 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 06:41:14,765 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 06:41:14,765 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:14,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1579582129, now seen corresponding path program 1 times [2022-01-10 06:41:14,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:14,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [971060428] [2022-01-10 06:41:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:14,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:14,767 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 06:41:14,768 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 06:41:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:41:14,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:14,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:15,167 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:15,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [971060428] [2022-01-10 06:41:15,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [971060428] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:41:15,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:41:15,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-01-10 06:41:15,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129004919] [2022-01-10 06:41:15,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:15,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 06:41:15,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:15,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 06:41:15,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:41:15,168 INFO L87 Difference]: Start difference. First operand 11769 states and 15640 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:16,460 INFO L93 Difference]: Finished difference Result 32398 states and 43276 transitions. [2022-01-10 06:41:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 06:41:16,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 84 [2022-01-10 06:41:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:16,551 INFO L225 Difference]: With dead ends: 32398 [2022-01-10 06:41:16,551 INFO L226 Difference]: Without dead ends: 22504 [2022-01-10 06:41:16,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-01-10 06:41:16,587 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 759 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:16,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [759 Valid, 803 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:41:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22504 states. [2022-01-10 06:41:17,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22504 to 19949. [2022-01-10 06:41:17,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19949 states, 16947 states have (on average 1.3048917212485986) internal successors, (22114), 17175 states have internal predecessors, (22114), 1758 states have call successors, (1758), 1074 states have call predecessors, (1758), 1243 states have return successors, (2890), 1701 states have call predecessors, (2890), 1755 states have call successors, (2890) [2022-01-10 06:41:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19949 states to 19949 states and 26762 transitions. [2022-01-10 06:41:17,750 INFO L78 Accepts]: Start accepts. Automaton has 19949 states and 26762 transitions. Word has length 84 [2022-01-10 06:41:17,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:17,750 INFO L470 AbstractCegarLoop]: Abstraction has 19949 states and 26762 transitions. [2022-01-10 06:41:17,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:17,751 INFO L276 IsEmpty]: Start isEmpty. Operand 19949 states and 26762 transitions. [2022-01-10 06:41:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-10 06:41:17,755 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:17,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:41:17,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-01-10 06:41:17,964 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 06:41:17,964 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:17,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1643055201, now seen corresponding path program 1 times [2022-01-10 06:41:17,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:17,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789723096] [2022-01-10 06:41:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:17,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:17,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:17,967 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 06:41:17,968 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 06:41:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 06:41:18,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:18,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:18,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789723096] [2022-01-10 06:41:18,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789723096] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 06:41:18,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 06:41:18,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2022-01-10 06:41:18,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154006247] [2022-01-10 06:41:18,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:18,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:18,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:18,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:18,352 INFO L87 Difference]: Start difference. First operand 19949 states and 26762 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:20,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:20,304 INFO L93 Difference]: Finished difference Result 56907 states and 79383 transitions. [2022-01-10 06:41:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-10 06:41:20,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-01-10 06:41:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:20,473 INFO L225 Difference]: With dead ends: 56907 [2022-01-10 06:41:20,473 INFO L226 Difference]: Without dead ends: 39566 [2022-01-10 06:41:20,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-10 06:41:20,526 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 610 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:20,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 2582 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 06:41:20,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39566 states. [2022-01-10 06:41:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39566 to 26709. [2022-01-10 06:41:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26709 states, 22755 states have (on average 1.3132058888156448) internal successors, (29882), 23043 states have internal predecessors, (29882), 2314 states have call successors, (2314), 1414 states have call predecessors, (2314), 1639 states have return successors, (3866), 2253 states have call predecessors, (3866), 2311 states have call successors, (3866) [2022-01-10 06:41:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26709 states to 26709 states and 36062 transitions. [2022-01-10 06:41:22,134 INFO L78 Accepts]: Start accepts. Automaton has 26709 states and 36062 transitions. Word has length 87 [2022-01-10 06:41:22,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:22,135 INFO L470 AbstractCegarLoop]: Abstraction has 26709 states and 36062 transitions. [2022-01-10 06:41:22,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:22,135 INFO L276 IsEmpty]: Start isEmpty. Operand 26709 states and 36062 transitions. [2022-01-10 06:41:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-10 06:41:22,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:22,141 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 06:41:22,151 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 06:41:22,350 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 06:41:22,351 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:22,351 INFO L85 PathProgramCache]: Analyzing trace with hash 179710777, now seen corresponding path program 1 times [2022-01-10 06:41:22,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:22,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337020394] [2022-01-10 06:41:22,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:22,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:22,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:22,353 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 06:41:22,355 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 06:41:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:22,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:22,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 06:41:22,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:22,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:22,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337020394] [2022-01-10 06:41:22,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337020394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:22,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:22,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:22,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379770196] [2022-01-10 06:41:22,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:22,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:22,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:22,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:22,553 INFO L87 Difference]: Start difference. First operand 26709 states and 36062 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:23,857 INFO L93 Difference]: Finished difference Result 53625 states and 72337 transitions. [2022-01-10 06:41:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:23,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2022-01-10 06:41:23,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:23,975 INFO L225 Difference]: With dead ends: 53625 [2022-01-10 06:41:23,975 INFO L226 Difference]: Without dead ends: 26932 [2022-01-10 06:41:24,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 92 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 06:41:24,044 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 124 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 463 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 06:41:24,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 463 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26932 states. [2022-01-10 06:41:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26932 to 26798. [2022-01-10 06:41:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26798 states, 22843 states have (on average 1.3019305695399028) internal successors, (29740), 23109 states have internal predecessors, (29740), 2292 states have call successors, (2292), 1437 states have call predecessors, (2292), 1662 states have return successors, (3454), 2253 states have call predecessors, (3454), 2289 states have call successors, (3454) [2022-01-10 06:41:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26798 states to 26798 states and 35486 transitions. [2022-01-10 06:41:25,461 INFO L78 Accepts]: Start accepts. Automaton has 26798 states and 35486 transitions. Word has length 94 [2022-01-10 06:41:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:25,462 INFO L470 AbstractCegarLoop]: Abstraction has 26798 states and 35486 transitions. [2022-01-10 06:41:25,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 06:41:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 26798 states and 35486 transitions. [2022-01-10 06:41:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-10 06:41:25,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:25,468 INFO L514 BasicCegarLoop]: trace histogram [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 06:41:25,482 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 06:41:25,677 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 06:41:25,677 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:25,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1094142346, now seen corresponding path program 1 times [2022-01-10 06:41:25,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:25,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566070129] [2022-01-10 06:41:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:25,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:25,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:25,680 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 06:41:25,683 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 06:41:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:25,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 06:41:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:41:25,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-10 06:41:26,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:26,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566070129] [2022-01-10 06:41:26,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566070129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:26,093 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:26,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-01-10 06:41:26,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258098496] [2022-01-10 06:41:26,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:26,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:26,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:26,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:26,095 INFO L87 Difference]: Start difference. First operand 26798 states and 35486 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:41:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:27,315 INFO L93 Difference]: Finished difference Result 51136 states and 67844 transitions. [2022-01-10 06:41:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:41:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 96 [2022-01-10 06:41:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:27,413 INFO L225 Difference]: With dead ends: 51136 [2022-01-10 06:41:27,414 INFO L226 Difference]: Without dead ends: 26958 [2022-01-10 06:41:27,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:41:27,462 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 226 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:27,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1263 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26958 states. [2022-01-10 06:41:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26958 to 24884. [2022-01-10 06:41:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24884 states, 21217 states have (on average 1.3016449073855871) internal successors, (27617), 21447 states have internal predecessors, (27617), 2130 states have call successors, (2130), 1329 states have call predecessors, (2130), 1536 states have return successors, (3214), 2109 states have call predecessors, (3214), 2127 states have call successors, (3214) [2022-01-10 06:41:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24884 states to 24884 states and 32961 transitions. [2022-01-10 06:41:28,778 INFO L78 Accepts]: Start accepts. Automaton has 24884 states and 32961 transitions. Word has length 96 [2022-01-10 06:41:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:28,778 INFO L470 AbstractCegarLoop]: Abstraction has 24884 states and 32961 transitions. [2022-01-10 06:41:28,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-01-10 06:41:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 24884 states and 32961 transitions. [2022-01-10 06:41:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:41:28,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:28,784 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 06:41:28,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-01-10 06:41:28,992 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 06:41:28,993 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:28,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2018622111, now seen corresponding path program 1 times [2022-01-10 06:41:28,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:28,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786460613] [2022-01-10 06:41:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:28,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:28,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:28,994 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 06:41:28,995 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 06:41:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:29,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:29,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:29,194 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:29,194 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:29,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786460613] [2022-01-10 06:41:29,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786460613] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:29,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:29,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 06:41:29,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076894929] [2022-01-10 06:41:29,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:29,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 06:41:29,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 06:41:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 06:41:29,195 INFO L87 Difference]: Start difference. First operand 24884 states and 32961 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:41:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:30,199 INFO L93 Difference]: Finished difference Result 50091 states and 66155 transitions. [2022-01-10 06:41:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:41:30,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 97 [2022-01-10 06:41:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:30,283 INFO L225 Difference]: With dead ends: 50091 [2022-01-10 06:41:30,283 INFO L226 Difference]: Without dead ends: 25223 [2022-01-10 06:41:30,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 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 06:41:30,338 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 153 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:30,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 416 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25223 states. [2022-01-10 06:41:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25223 to 25220. [2022-01-10 06:41:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25220 states, 21385 states have (on average 1.2924012158054712) internal successors, (27638), 21783 states have internal predecessors, (27638), 2130 states have call successors, (2130), 1329 states have call predecessors, (2130), 1704 states have return successors, (3214), 2109 states have call predecessors, (3214), 2127 states have call successors, (3214) [2022-01-10 06:41:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25220 states to 25220 states and 32982 transitions. [2022-01-10 06:41:31,783 INFO L78 Accepts]: Start accepts. Automaton has 25220 states and 32982 transitions. Word has length 97 [2022-01-10 06:41:31,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:31,784 INFO L470 AbstractCegarLoop]: Abstraction has 25220 states and 32982 transitions. [2022-01-10 06:41:31,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-01-10 06:41:31,784 INFO L276 IsEmpty]: Start isEmpty. Operand 25220 states and 32982 transitions. [2022-01-10 06:41:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-10 06:41:31,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:31,790 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 06:41:31,803 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 06:41:31,998 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 06:41:31,998 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:31,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1281651487, now seen corresponding path program 1 times [2022-01-10 06:41:31,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:31,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112057285] [2022-01-10 06:41:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:31,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:31,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:32,000 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 06:41:32,002 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 06:41:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:32,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:32,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-10 06:41:32,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:32,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:32,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112057285] [2022-01-10 06:41:32,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112057285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:32,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:32,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:32,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558693646] [2022-01-10 06:41:32,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:32,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:32,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:32,176 INFO L87 Difference]: Start difference. First operand 25220 states and 32982 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:41:33,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:33,048 INFO L93 Difference]: Finished difference Result 27054 states and 35237 transitions. [2022-01-10 06:41:33,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:33,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 97 [2022-01-10 06:41:33,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:33,121 INFO L225 Difference]: With dead ends: 27054 [2022-01-10 06:41:33,122 INFO L226 Difference]: Without dead ends: 25216 [2022-01-10 06:41:33,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 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 06:41:33,141 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 169 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 177 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 06:41:33,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 177 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25216 states. [2022-01-10 06:41:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25216 to 24701. [2022-01-10 06:41:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24701 states, 20953 states have (on average 1.2927981673268745) internal successors, (27088), 21344 states have internal predecessors, (27088), 2079 states have call successors, (2079), 1299 states have call predecessors, (2079), 1668 states have return successors, (3151), 2058 states have call predecessors, (3151), 2076 states have call successors, (3151) [2022-01-10 06:41:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24701 states to 24701 states and 32318 transitions. [2022-01-10 06:41:34,249 INFO L78 Accepts]: Start accepts. Automaton has 24701 states and 32318 transitions. Word has length 97 [2022-01-10 06:41:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:34,249 INFO L470 AbstractCegarLoop]: Abstraction has 24701 states and 32318 transitions. [2022-01-10 06:41:34,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:41:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 24701 states and 32318 transitions. [2022-01-10 06:41:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-10 06:41:34,254 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:34,254 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2022-01-10 06:41:34,263 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 06:41:34,463 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 06:41:34,463 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:34,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:34,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1766914234, now seen corresponding path program 1 times [2022-01-10 06:41:34,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944960156] [2022-01-10 06:41:34,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:34,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:34,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:34,465 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 06:41:34,468 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 06:41:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:34,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:34,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:34,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:34,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:34,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944960156] [2022-01-10 06:41:34,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944960156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:34,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:34,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:34,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086067950] [2022-01-10 06:41:34,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:34,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:34,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:34,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:34,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:34,640 INFO L87 Difference]: Start difference. First operand 24701 states and 32318 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:41:35,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:35,585 INFO L93 Difference]: Finished difference Result 51837 states and 67596 transitions. [2022-01-10 06:41:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:35,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 98 [2022-01-10 06:41:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:35,662 INFO L225 Difference]: With dead ends: 51837 [2022-01-10 06:41:35,662 INFO L226 Difference]: Without dead ends: 27148 [2022-01-10 06:41:35,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 96 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 06:41:35,705 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 128 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:35,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 463 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27148 states. [2022-01-10 06:41:36,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27148 to 27143. [2022-01-10 06:41:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27143 states, 23283 states have (on average 1.2834686251771679) internal successors, (29883), 23720 states have internal predecessors, (29883), 2079 states have call successors, (2079), 1365 states have call predecessors, (2079), 1780 states have return successors, (2974), 2058 states have call predecessors, (2974), 2076 states have call successors, (2974) [2022-01-10 06:41:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27143 states to 27143 states and 34936 transitions. [2022-01-10 06:41:37,055 INFO L78 Accepts]: Start accepts. Automaton has 27143 states and 34936 transitions. Word has length 98 [2022-01-10 06:41:37,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:37,056 INFO L470 AbstractCegarLoop]: Abstraction has 27143 states and 34936 transitions. [2022-01-10 06:41:37,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 06:41:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 27143 states and 34936 transitions. [2022-01-10 06:41:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-10 06:41:37,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:37,065 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 06:41:37,075 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 06:41:37,273 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 06:41:37,273 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:37,274 INFO L85 PathProgramCache]: Analyzing trace with hash 761644165, now seen corresponding path program 1 times [2022-01-10 06:41:37,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:37,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429342299] [2022-01-10 06:41:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:37,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:37,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:37,275 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 06:41:37,276 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 06:41:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:37,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:37,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 06:41:37,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:37,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:37,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429342299] [2022-01-10 06:41:37,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429342299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:37,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:37,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:37,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218608360] [2022-01-10 06:41:37,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:37,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:37,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:37,507 INFO L87 Difference]: Start difference. First operand 27143 states and 34936 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:41:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:39,174 INFO L93 Difference]: Finished difference Result 71124 states and 91826 transitions. [2022-01-10 06:41:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:39,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 119 [2022-01-10 06:41:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:39,272 INFO L225 Difference]: With dead ends: 71124 [2022-01-10 06:41:39,272 INFO L226 Difference]: Without dead ends: 44746 [2022-01-10 06:41:39,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 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 06:41:39,311 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 106 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:39,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 372 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44746 states. [2022-01-10 06:41:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44746 to 42909. [2022-01-10 06:41:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42909 states, 36689 states have (on average 1.288860421379705) internal successors, (47287), 37405 states have internal predecessors, (47287), 3352 states have call successors, (3352), 2188 states have call predecessors, (3352), 2867 states have return successors, (4757), 3316 states have call predecessors, (4757), 3349 states have call successors, (4757) [2022-01-10 06:41:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42909 states to 42909 states and 55396 transitions. [2022-01-10 06:41:41,188 INFO L78 Accepts]: Start accepts. Automaton has 42909 states and 55396 transitions. Word has length 119 [2022-01-10 06:41:41,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:41,188 INFO L470 AbstractCegarLoop]: Abstraction has 42909 states and 55396 transitions. [2022-01-10 06:41:41,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:41:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 42909 states and 55396 transitions. [2022-01-10 06:41:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 06:41:41,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:41,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 06:41:41,209 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 06:41:41,409 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 06:41:41,409 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:41,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:41,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1444020970, now seen corresponding path program 1 times [2022-01-10 06:41:41,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:41,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610640008] [2022-01-10 06:41:41,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:41,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:41,411 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 06:41:41,412 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 06:41:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:41:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 06:41:41,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:41,659 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610640008] [2022-01-10 06:41:41,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610640008] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:41,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:41,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 06:41:41,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613056226] [2022-01-10 06:41:41,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:41,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:41,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:41,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:41,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:41,660 INFO L87 Difference]: Start difference. First operand 42909 states and 55396 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:41:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:44,065 INFO L93 Difference]: Finished difference Result 99189 states and 127432 transitions. [2022-01-10 06:41:44,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:44,067 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 136 [2022-01-10 06:41:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:44,244 INFO L225 Difference]: With dead ends: 99189 [2022-01-10 06:41:44,244 INFO L226 Difference]: Without dead ends: 63280 [2022-01-10 06:41:44,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 134 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 06:41:44,313 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 80 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:44,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 357 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63280 states. [2022-01-10 06:41:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63280 to 63275. [2022-01-10 06:41:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63275 states, 53812 states have (on average 1.274436928566119) internal successors, (68580), 54787 states have internal predecessors, (68580), 5076 states have call successors, (5076), 3464 states have call predecessors, (5076), 4386 states have return successors, (6754), 5024 states have call predecessors, (6754), 5073 states have call successors, (6754) [2022-01-10 06:41:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63275 states to 63275 states and 80410 transitions. [2022-01-10 06:41:47,215 INFO L78 Accepts]: Start accepts. Automaton has 63275 states and 80410 transitions. Word has length 136 [2022-01-10 06:41:47,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:47,215 INFO L470 AbstractCegarLoop]: Abstraction has 63275 states and 80410 transitions. [2022-01-10 06:41:47,215 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, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-01-10 06:41:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 63275 states and 80410 transitions. [2022-01-10 06:41:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-10 06:41:47,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:47,225 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-01-10 06:41:47,233 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 06:41:47,433 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 06:41:47,433 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:47,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:47,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1815710136, now seen corresponding path program 1 times [2022-01-10 06:41:47,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:47,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179161978] [2022-01-10 06:41:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:47,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:47,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:47,435 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 06:41:47,436 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 06:41:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 06:41:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 06:41:47,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:47,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:47,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179161978] [2022-01-10 06:41:47,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179161978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:47,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:47,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 06:41:47,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265804456] [2022-01-10 06:41:47,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:47,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:47,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:47,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:47,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:47,671 INFO L87 Difference]: Start difference. First operand 63275 states and 80410 transitions. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:41:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:49,581 INFO L93 Difference]: Finished difference Result 105279 states and 134571 transitions. [2022-01-10 06:41:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 06:41:49,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 144 [2022-01-10 06:41:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:49,684 INFO L225 Difference]: With dead ends: 105279 [2022-01-10 06:41:49,684 INFO L226 Difference]: Without dead ends: 42016 [2022-01-10 06:41:49,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 06:41:49,775 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 60 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:49,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 824 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42016 states. [2022-01-10 06:41:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42016 to 40481. [2022-01-10 06:41:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40481 states, 35491 states have (on average 1.2848609506635484) internal successors, (45601), 35881 states have internal predecessors, (45601), 2610 states have call successors, (2610), 1696 states have call predecessors, (2610), 2379 states have return successors, (3623), 2903 states have call predecessors, (3623), 2607 states have call successors, (3623) [2022-01-10 06:41:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40481 states to 40481 states and 51834 transitions. [2022-01-10 06:41:51,493 INFO L78 Accepts]: Start accepts. Automaton has 40481 states and 51834 transitions. Word has length 144 [2022-01-10 06:41:51,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:51,493 INFO L470 AbstractCegarLoop]: Abstraction has 40481 states and 51834 transitions. [2022-01-10 06:41:51,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 5 states have internal predecessors, (107), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 06:41:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 40481 states and 51834 transitions. [2022-01-10 06:41:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 06:41:51,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:51,503 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 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 06:41:51,511 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 06:41:51,711 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 06:41:51,711 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:51,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1479938528, now seen corresponding path program 1 times [2022-01-10 06:41:51,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:51,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487253567] [2022-01-10 06:41:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:51,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:51,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:51,713 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 06:41:51,715 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 06:41:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:51,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 06:41:51,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:41:52,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:41:52,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:52,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487253567] [2022-01-10 06:41:52,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487253567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:41:52,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:41:52,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:41:52,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445665868] [2022-01-10 06:41:52,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:41:52,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:41:52,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:41:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:41:52,127 INFO L87 Difference]: Start difference. First operand 40481 states and 51834 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:41:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:53,695 INFO L93 Difference]: Finished difference Result 80484 states and 103126 transitions. [2022-01-10 06:41:53,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:41:53,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 156 [2022-01-10 06:41:53,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:53,783 INFO L225 Difference]: With dead ends: 80484 [2022-01-10 06:41:53,784 INFO L226 Difference]: Without dead ends: 40324 [2022-01-10 06:41:53,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 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 06:41:53,840 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 44 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:53,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 330 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:41:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40324 states. [2022-01-10 06:41:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40324 to 40302. [2022-01-10 06:41:55,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40302 states, 35336 states have (on average 1.2854029884537017) internal successors, (45421), 35726 states have internal predecessors, (45421), 2598 states have call successors, (2598), 1684 states have call predecessors, (2598), 2367 states have return successors, (3611), 2891 states have call predecessors, (3611), 2595 states have call successors, (3611) [2022-01-10 06:41:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40302 states to 40302 states and 51630 transitions. [2022-01-10 06:41:55,528 INFO L78 Accepts]: Start accepts. Automaton has 40302 states and 51630 transitions. Word has length 156 [2022-01-10 06:41:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:41:55,529 INFO L470 AbstractCegarLoop]: Abstraction has 40302 states and 51630 transitions. [2022-01-10 06:41:55,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-01-10 06:41:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 40302 states and 51630 transitions. [2022-01-10 06:41:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 06:41:55,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:41:55,538 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 3, 3, 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 06:41:55,549 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 06:41:55,747 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 06:41:55,747 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:41:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:41:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1916583821, now seen corresponding path program 1 times [2022-01-10 06:41:55,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:41:55,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960119582] [2022-01-10 06:41:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:41:55,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:41:55,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:41:55,749 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 06:41:55,750 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 06:41:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:41:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 06:41:55,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:41:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 92 proven. 11 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-01-10 06:41:56,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 06:41:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-10 06:41:56,627 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:41:56,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960119582] [2022-01-10 06:41:56,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960119582] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 06:41:56,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 06:41:56,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 06:41:56,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736882751] [2022-01-10 06:41:56,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 06:41:56,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 06:41:56,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:41:56,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 06:41:56,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:56,629 INFO L87 Difference]: Start difference. First operand 40302 states and 51630 transitions. Second operand has 6 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-01-10 06:41:58,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:41:58,516 INFO L93 Difference]: Finished difference Result 83390 states and 107205 transitions. [2022-01-10 06:41:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 06:41:58,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) Word has length 170 [2022-01-10 06:41:58,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:41:58,630 INFO L225 Difference]: With dead ends: 83390 [2022-01-10 06:41:58,630 INFO L226 Difference]: Without dead ends: 43377 [2022-01-10 06:41:58,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-10 06:41:58,670 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 594 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 06:41:58,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 676 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 06:41:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43377 states. [2022-01-10 06:42:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43377 to 42531. [2022-01-10 06:42:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42531 states, 37194 states have (on average 1.2802602570307038) internal successors, (47618), 37640 states have internal predecessors, (47618), 2775 states have call successors, (2775), 1797 states have call predecessors, (2775), 2561 states have return successors, (3888), 3093 states have call predecessors, (3888), 2772 states have call successors, (3888) [2022-01-10 06:42:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42531 states to 42531 states and 54281 transitions. [2022-01-10 06:42:00,536 INFO L78 Accepts]: Start accepts. Automaton has 42531 states and 54281 transitions. Word has length 170 [2022-01-10 06:42:00,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 06:42:00,536 INFO L470 AbstractCegarLoop]: Abstraction has 42531 states and 54281 transitions. [2022-01-10 06:42:00,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 5 states have call successors, (27), 4 states have call predecessors, (27), 4 states have return successors, (26), 5 states have call predecessors, (26), 5 states have call successors, (26) [2022-01-10 06:42:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand 42531 states and 54281 transitions. [2022-01-10 06:42:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-10 06:42:00,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 06:42:00,541 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 06:42:00,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-01-10 06:42:00,743 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 06:42:00,743 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 06:42:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 06:42:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash -996804165, now seen corresponding path program 1 times [2022-01-10 06:42:00,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 06:42:00,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319466222] [2022-01-10 06:42:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 06:42:00,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 06:42:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 06:42:00,745 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 06:42:00,746 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 06:42:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 06:42:00,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 06:42:00,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 06:42:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-01-10 06:42:01,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 06:42:01,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 06:42:01,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319466222] [2022-01-10 06:42:01,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319466222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 06:42:01,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 06:42:01,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 06:42:01,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132714104] [2022-01-10 06:42:01,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 06:42:01,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 06:42:01,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 06:42:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 06:42:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 06:42:01,053 INFO L87 Difference]: Start difference. First operand 42531 states and 54281 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-01-10 06:42:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 06:42:02,805 INFO L93 Difference]: Finished difference Result 79590 states and 102640 transitions. [2022-01-10 06:42:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 06:42:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 176 [2022-01-10 06:42:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 06:42:02,883 INFO L225 Difference]: With dead ends: 79590 [2022-01-10 06:42:02,883 INFO L226 Difference]: Without dead ends: 41133 [2022-01-10 06:42:02,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 174 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 06:42:02,925 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 109 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 06:42:02,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 435 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 06:42:02,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41133 states.