/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:18:14,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:18:14,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:18:14,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:18:14,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:18:14,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:18:14,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:18:14,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:18:14,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:18:14,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:18:14,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:18:14,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:18:14,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:18:14,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:18:14,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:18:14,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:18:14,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:18:14,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:18:14,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:18:14,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:18:14,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:18:14,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:18:14,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:18:14,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:18:14,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:18:14,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:18:14,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:18:14,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:18:14,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:18:14,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:18:14,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:18:14,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:18:14,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:18:14,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:18:14,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:18:14,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:18:14,924 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 08:18:14,948 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:18:14,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:18:14,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:18:14,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:18:14,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:18:14,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:18:14,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:18:14,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:18:14,950 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:18:14,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:18:14,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:18:14,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:18:14,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:18:14,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:18:14,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:18:14,951 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:18:14,952 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:18:14,952 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:18:14,952 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:18:14,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:18:14,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:18:14,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:18:14,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:18:14,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:18:14,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:18:14,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:18:14,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:18:14,953 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:18:14,953 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:18:14,953 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:18:14,953 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:18:14,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:18:14,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:18:14,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:18:15,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:18:15,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:18:15,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:18:15,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:18:15,173 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:18:15,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2022-01-10 08:18:15,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dacce5cb/90ea63f5a49749d7ba3ec0d25ae42b04/FLAGb6bb5cf78 [2022-01-10 08:18:15,585 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:18:15,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2022-01-10 08:18:15,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dacce5cb/90ea63f5a49749d7ba3ec0d25ae42b04/FLAGb6bb5cf78 [2022-01-10 08:18:16,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dacce5cb/90ea63f5a49749d7ba3ec0d25ae42b04 [2022-01-10 08:18:16,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:18:16,021 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:18:16,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:18:16,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:18:16,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:18:16,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3199af59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16, skipping insertion in model container [2022-01-10 08:18:16,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:18:16,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:18:16,198 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2022-01-10 08:18:16,241 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2022-01-10 08:18:16,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:18:16,292 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:18:16,300 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[913,926] [2022-01-10 08:18:16,309 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_1.cil-2+token_ring.05.cil-2.c[5977,5990] [2022-01-10 08:18:16,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:18:16,362 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:18:16,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16 WrapperNode [2022-01-10 08:18:16,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:18:16,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:18:16,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:18:16,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:18:16,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,442 INFO L137 Inliner]: procedures = 59, calls = 64, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 626 [2022-01-10 08:18:16,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:18:16,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:18:16,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:18:16,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:18:16,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,483 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:18:16,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:18:16,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:18:16,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:18:16,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (1/1) ... [2022-01-10 08:18:16,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:18:16,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:18:16,523 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 08:18:16,536 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 08:18:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:18:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:18:16,547 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:18:16,547 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-01-10 08:18:16,547 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-01-10 08:18:16,549 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:18:16,549 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:18:16,549 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:18:16,550 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:18:16,550 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:18:16,550 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:18:16,550 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:18:16,550 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:18:16,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:18:16,550 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:18:16,550 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:18:16,550 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:18:16,550 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:18:16,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:18:16,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:18:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:18:16,551 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:18:16,551 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-01-10 08:18:16,551 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-01-10 08:18:16,659 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:18:16,660 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:18:17,172 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:18:17,183 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:18:17,183 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2022-01-10 08:18:17,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:18:17 BoogieIcfgContainer [2022-01-10 08:18:17,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:18:17,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:18:17,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:18:17,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:18:17,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:18:16" (1/3) ... [2022-01-10 08:18:17,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d07813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:18:17, skipping insertion in model container [2022-01-10 08:18:17,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:18:16" (2/3) ... [2022-01-10 08:18:17,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d07813 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:18:17, skipping insertion in model container [2022-01-10 08:18:17,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:18:17" (3/3) ... [2022-01-10 08:18:17,193 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.05.cil-2.c [2022-01-10 08:18:17,197 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:18:17,197 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:18:17,240 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:18:17,246 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 08:18:17,246 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:18:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 254 states have internal predecessors, (399), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2022-01-10 08:18:17,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 08:18:17,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:17,281 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] [2022-01-10 08:18:17,281 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash -335189264, now seen corresponding path program 1 times [2022-01-10 08:18:17,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:17,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749080666] [2022-01-10 08:18:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:17,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:17,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:17,300 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 08:18:17,301 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 08:18:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:17,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:17,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:17,496 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 08:18:17,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:17,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749080666] [2022-01-10 08:18:17,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749080666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:17,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:17,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:17,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694742482] [2022-01-10 08:18:17,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:17,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:17,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:17,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:17,523 INFO L87 Difference]: Start difference. First operand has 287 states, 247 states have (on average 1.6153846153846154) internal successors, (399), 254 states have internal predecessors, (399), 27 states have call successors, (27), 10 states have call predecessors, (27), 10 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:18:17,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:17,674 INFO L93 Difference]: Finished difference Result 614 states and 972 transitions. [2022-01-10 08:18:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-01-10 08:18:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:17,693 INFO L225 Difference]: With dead ends: 614 [2022-01-10 08:18:17,693 INFO L226 Difference]: Without dead ends: 335 [2022-01-10 08:18:17,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 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 08:18:17,699 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 403 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:17,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 523 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-10 08:18:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2022-01-10 08:18:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 288 states have (on average 1.4895833333333333) internal successors, (429), 292 states have internal predecessors, (429), 31 states have call successors, (31), 12 states have call predecessors, (31), 10 states have return successors, (31), 27 states have call predecessors, (31), 27 states have call successors, (31) [2022-01-10 08:18:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 491 transitions. [2022-01-10 08:18:17,746 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 491 transitions. Word has length 44 [2022-01-10 08:18:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:17,746 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 491 transitions. [2022-01-10 08:18:17,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:18:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 491 transitions. [2022-01-10 08:18:17,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 08:18:17,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:17,748 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] [2022-01-10 08:18:17,758 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 08:18:17,955 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 08:18:17,955 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:17,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:17,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1892579596, now seen corresponding path program 1 times [2022-01-10 08:18:17,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:17,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819287583] [2022-01-10 08:18:17,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:17,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:17,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:17,959 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 08:18:17,965 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 08:18:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:18,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:18,125 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 08:18:18,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:18,126 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:18,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819287583] [2022-01-10 08:18:18,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819287583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:18,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:18,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:18,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103904227] [2022-01-10 08:18:18,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:18,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:18,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:18,140 INFO L87 Difference]: Start difference. First operand 331 states and 491 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:18:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:18,188 INFO L93 Difference]: Finished difference Result 539 states and 779 transitions. [2022-01-10 08:18:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:18,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-01-10 08:18:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:18,195 INFO L225 Difference]: With dead ends: 539 [2022-01-10 08:18:18,196 INFO L226 Difference]: Without dead ends: 424 [2022-01-10 08:18:18,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 08:18:18,198 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 62 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:18,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 828 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:18,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-10 08:18:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 398. [2022-01-10 08:18:18,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 349 states have (on average 1.4699140401146131) internal successors, (513), 353 states have internal predecessors, (513), 34 states have call successors, (34), 15 states have call predecessors, (34), 13 states have return successors, (35), 30 states have call predecessors, (35), 30 states have call successors, (35) [2022-01-10 08:18:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 582 transitions. [2022-01-10 08:18:18,237 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 582 transitions. Word has length 45 [2022-01-10 08:18:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:18,237 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 582 transitions. [2022-01-10 08:18:18,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:18:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 582 transitions. [2022-01-10 08:18:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 08:18:18,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:18,244 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] [2022-01-10 08:18:18,250 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 08:18:18,451 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 08:18:18,451 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:18,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:18,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1118030239, now seen corresponding path program 1 times [2022-01-10 08:18:18,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:18,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97168075] [2022-01-10 08:18:18,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:18,453 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:18,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:18,454 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 08:18:18,455 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 08:18:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:18,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:18,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:18,583 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 08:18:18,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:18,584 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:18,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97168075] [2022-01-10 08:18:18,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97168075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:18,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:18,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:18,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278456102] [2022-01-10 08:18:18,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:18,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:18,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:18,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:18,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:18,585 INFO L87 Difference]: Start difference. First operand 398 states and 582 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:18:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:18,610 INFO L93 Difference]: Finished difference Result 751 states and 1070 transitions. [2022-01-10 08:18:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-01-10 08:18:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:18,612 INFO L225 Difference]: With dead ends: 751 [2022-01-10 08:18:18,612 INFO L226 Difference]: Without dead ends: 569 [2022-01-10 08:18:18,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 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 08:18:18,614 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 383 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 503 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 08:18:18,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 503 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-10 08:18:18,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 555. [2022-01-10 08:18:18,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 488 states have (on average 1.4241803278688525) internal successors, (695), 494 states have internal predecessors, (695), 45 states have call successors, (45), 22 states have call predecessors, (45), 20 states have return successors, (51), 39 states have call predecessors, (51), 41 states have call successors, (51) [2022-01-10 08:18:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 791 transitions. [2022-01-10 08:18:18,633 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 791 transitions. Word has length 45 [2022-01-10 08:18:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:18,634 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 791 transitions. [2022-01-10 08:18:18,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-10 08:18:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 791 transitions. [2022-01-10 08:18:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-10 08:18:18,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:18,635 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:18:18,648 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 08:18:18,841 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 08:18:18,841 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1874322656, now seen corresponding path program 1 times [2022-01-10 08:18:18,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:18,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573087847] [2022-01-10 08:18:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:18,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:18,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:18,843 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 08:18:18,845 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 08:18:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:18,997 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:18:18,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:18,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:18,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573087847] [2022-01-10 08:18:18,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573087847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:18,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:18,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:18,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113389636] [2022-01-10 08:18:18,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:18,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:18,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:18,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:18,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:18,999 INFO L87 Difference]: Start difference. First operand 555 states and 791 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:18:19,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:19,029 INFO L93 Difference]: Finished difference Result 1067 states and 1488 transitions. [2022-01-10 08:18:19,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:19,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-01-10 08:18:19,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:19,032 INFO L225 Difference]: With dead ends: 1067 [2022-01-10 08:18:19,032 INFO L226 Difference]: Without dead ends: 728 [2022-01-10 08:18:19,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 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 08:18:19,034 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 50 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:19,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 874 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-01-10 08:18:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 728. [2022-01-10 08:18:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 639 states have (on average 1.3708920187793427) internal successors, (876), 645 states have internal predecessors, (876), 59 states have call successors, (59), 30 states have call predecessors, (59), 28 states have return successors, (73), 53 states have call predecessors, (73), 55 states have call successors, (73) [2022-01-10 08:18:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1008 transitions. [2022-01-10 08:18:19,056 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1008 transitions. Word has length 62 [2022-01-10 08:18:19,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:19,056 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 1008 transitions. [2022-01-10 08:18:19,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:18:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1008 transitions. [2022-01-10 08:18:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 08:18:19,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:19,058 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:18:19,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-01-10 08:18:19,275 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 08:18:19,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:19,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:19,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1000568822, now seen corresponding path program 1 times [2022-01-10 08:18:19,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:19,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139857887] [2022-01-10 08:18:19,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:19,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:19,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:19,278 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 08:18:19,279 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 08:18:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:19,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 08:18:19,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:19,497 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:19,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139857887] [2022-01-10 08:18:19,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139857887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:19,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:19,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:19,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838746801] [2022-01-10 08:18:19,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:19,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:19,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:19,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:19,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:19,499 INFO L87 Difference]: Start difference. First operand 728 states and 1008 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:18:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:19,530 INFO L93 Difference]: Finished difference Result 1275 states and 1729 transitions. [2022-01-10 08:18:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:19,531 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-01-10 08:18:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:19,534 INFO L225 Difference]: With dead ends: 1275 [2022-01-10 08:18:19,534 INFO L226 Difference]: Without dead ends: 855 [2022-01-10 08:18:19,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 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 08:18:19,535 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 370 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 498 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 08:18:19,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 498 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:19,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-01-10 08:18:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2022-01-10 08:18:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 752 states have (on average 1.3404255319148937) internal successors, (1008), 758 states have internal predecessors, (1008), 67 states have call successors, (67), 36 states have call predecessors, (67), 34 states have return successors, (85), 61 states have call predecessors, (85), 63 states have call successors, (85) [2022-01-10 08:18:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1160 transitions. [2022-01-10 08:18:19,560 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1160 transitions. Word has length 67 [2022-01-10 08:18:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:19,560 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1160 transitions. [2022-01-10 08:18:19,560 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, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:18:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1160 transitions. [2022-01-10 08:18:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:18:19,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:19,562 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:18:19,570 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-01-10 08:18:19,768 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 08:18:19,769 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:19,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2083316816, now seen corresponding path program 1 times [2022-01-10 08:18:19,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:19,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138600217] [2022-01-10 08:18:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:19,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:19,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:19,771 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 08:18:19,771 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 08:18:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:19,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:19,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 08:18:19,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:19,960 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138600217] [2022-01-10 08:18:19,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138600217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:19,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:19,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:19,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181594017] [2022-01-10 08:18:19,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:19,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:19,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:19,961 INFO L87 Difference]: Start difference. First operand 855 states and 1160 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:18:20,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:20,021 INFO L93 Difference]: Finished difference Result 1492 states and 2005 transitions. [2022-01-10 08:18:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-01-10 08:18:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:20,029 INFO L225 Difference]: With dead ends: 1492 [2022-01-10 08:18:20,029 INFO L226 Difference]: Without dead ends: 998 [2022-01-10 08:18:20,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 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 08:18:20,049 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 50 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1667 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 08:18:20,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1667 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-01-10 08:18:20,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 896. [2022-01-10 08:18:20,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 791 states have (on average 1.3236409608091024) internal successors, (1047), 799 states have internal predecessors, (1047), 67 states have call successors, (67), 36 states have call predecessors, (67), 36 states have return successors, (87), 61 states have call predecessors, (87), 63 states have call successors, (87) [2022-01-10 08:18:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1201 transitions. [2022-01-10 08:18:20,082 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1201 transitions. Word has length 68 [2022-01-10 08:18:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:20,082 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 1201 transitions. [2022-01-10 08:18:20,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:18:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1201 transitions. [2022-01-10 08:18:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:18:20,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:20,084 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:18:20,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 08:18:20,304 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 08:18:20,304 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:20,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1182291182, now seen corresponding path program 1 times [2022-01-10 08:18:20,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:20,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130959984] [2022-01-10 08:18:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:20,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:20,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:20,307 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 08:18:20,308 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 08:18:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:20,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:20,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 08:18:20,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:20,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:20,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130959984] [2022-01-10 08:18:20,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130959984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:20,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:20,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:20,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057282733] [2022-01-10 08:18:20,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:20,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:20,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:20,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:20,500 INFO L87 Difference]: Start difference. First operand 896 states and 1201 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:18:20,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:20,538 INFO L93 Difference]: Finished difference Result 1389 states and 1847 transitions. [2022-01-10 08:18:20,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:20,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-01-10 08:18:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:20,541 INFO L225 Difference]: With dead ends: 1389 [2022-01-10 08:18:20,541 INFO L226 Difference]: Without dead ends: 807 [2022-01-10 08:18:20,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 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 08:18:20,543 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 10 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1639 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 08:18:20,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1639 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-01-10 08:18:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 787. [2022-01-10 08:18:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 696 states have (on average 1.3247126436781609) internal successors, (922), 706 states have internal predecessors, (922), 57 states have call successors, (57), 30 states have call predecessors, (57), 32 states have return successors, (73), 51 states have call predecessors, (73), 53 states have call successors, (73) [2022-01-10 08:18:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1052 transitions. [2022-01-10 08:18:20,564 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1052 transitions. Word has length 68 [2022-01-10 08:18:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:20,564 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 1052 transitions. [2022-01-10 08:18:20,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-10 08:18:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1052 transitions. [2022-01-10 08:18:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-10 08:18:20,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:20,565 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:18:20,574 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 08:18:20,775 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 08:18:20,775 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1062909138, now seen corresponding path program 1 times [2022-01-10 08:18:20,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:20,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339198944] [2022-01-10 08:18:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:20,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:20,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:20,777 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 08:18:20,779 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 08:18:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:20,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:20,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:18:20,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:18:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:18:21,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:21,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339198944] [2022-01-10 08:18:21,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339198944] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 08:18:21,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 08:18:21,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-01-10 08:18:21,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134341953] [2022-01-10 08:18:21,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:21,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:21,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:21,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:21,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:21,066 INFO L87 Difference]: Start difference. First operand 787 states and 1052 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:18:21,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:21,163 INFO L93 Difference]: Finished difference Result 842 states and 1119 transitions. [2022-01-10 08:18:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:21,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-01-10 08:18:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:21,167 INFO L225 Difference]: With dead ends: 842 [2022-01-10 08:18:21,167 INFO L226 Difference]: Without dead ends: 839 [2022-01-10 08:18:21,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 133 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 08:18:21,167 INFO L933 BasicCegarLoop]: 436 mSDtfsCounter, 732 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:21,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 503 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:18:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-01-10 08:18:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 786. [2022-01-10 08:18:21,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 696 states have (on average 1.3218390804597702) internal successors, (920), 705 states have internal predecessors, (920), 56 states have call successors, (56), 30 states have call predecessors, (56), 32 states have return successors, (73), 51 states have call predecessors, (73), 53 states have call successors, (73) [2022-01-10 08:18:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1049 transitions. [2022-01-10 08:18:21,188 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1049 transitions. Word has length 68 [2022-01-10 08:18:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:21,188 INFO L470 AbstractCegarLoop]: Abstraction has 786 states and 1049 transitions. [2022-01-10 08:18:21,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-10 08:18:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1049 transitions. [2022-01-10 08:18:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 08:18:21,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:21,190 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-10 08:18:21,198 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 08:18:21,396 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 08:18:21,397 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1408647803, now seen corresponding path program 1 times [2022-01-10 08:18:21,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:21,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761505522] [2022-01-10 08:18:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:21,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:21,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:21,399 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 08:18:21,401 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 08:18:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:18:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:18:21,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:18:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:18:21,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:21,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761505522] [2022-01-10 08:18:21,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761505522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:18:21,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 08:18:21,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2022-01-10 08:18:21,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977828881] [2022-01-10 08:18:21,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 08:18:21,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 08:18:21,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 08:18:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:18:21,844 INFO L87 Difference]: Start difference. First operand 786 states and 1049 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 08:18:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:22,015 INFO L93 Difference]: Finished difference Result 1609 states and 2091 transitions. [2022-01-10 08:18:22,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:18:22,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 69 [2022-01-10 08:18:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:22,021 INFO L225 Difference]: With dead ends: 1609 [2022-01-10 08:18:22,021 INFO L226 Difference]: Without dead ends: 1606 [2022-01-10 08:18:22,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:18:22,022 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 649 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:22,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 1553 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:18:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-01-10 08:18:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1135. [2022-01-10 08:18:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1009 states have (on average 1.3002973240832507) internal successors, (1312), 1024 states have internal predecessors, (1312), 75 states have call successors, (75), 43 states have call predecessors, (75), 49 states have return successors, (104), 68 states have call predecessors, (104), 72 states have call successors, (104) [2022-01-10 08:18:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1491 transitions. [2022-01-10 08:18:22,087 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1491 transitions. Word has length 69 [2022-01-10 08:18:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:22,088 INFO L470 AbstractCegarLoop]: Abstraction has 1135 states and 1491 transitions. [2022-01-10 08:18:22,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-10 08:18:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1491 transitions. [2022-01-10 08:18:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-10 08:18:22,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:22,090 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-01-10 08:18:22,109 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 08:18:22,298 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 08:18:22,298 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:22,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:22,299 INFO L85 PathProgramCache]: Analyzing trace with hash -618861047, now seen corresponding path program 2 times [2022-01-10 08:18:22,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:22,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93573733] [2022-01-10 08:18:22,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:18:22,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:22,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:22,300 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 08:18:22,321 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 08:18:22,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:18:22,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:18:22,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:22,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:18:22,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:22,461 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:22,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93573733] [2022-01-10 08:18:22,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93573733] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:22,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:22,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:22,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739651837] [2022-01-10 08:18:22,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:22,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:22,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:22,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:22,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:22,462 INFO L87 Difference]: Start difference. First operand 1135 states and 1491 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 08:18:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:22,507 INFO L93 Difference]: Finished difference Result 1776 states and 2308 transitions. [2022-01-10 08:18:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:22,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-01-10 08:18:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:22,510 INFO L225 Difference]: With dead ends: 1776 [2022-01-10 08:18:22,510 INFO L226 Difference]: Without dead ends: 1025 [2022-01-10 08:18:22,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 86 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 08:18:22,512 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 373 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:22,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 517 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-01-10 08:18:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 1013. [2022-01-10 08:18:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 900 states have (on average 1.3) internal successors, (1170), 915 states have internal predecessors, (1170), 68 states have call successors, (68), 38 states have call predecessors, (68), 43 states have return successors, (93), 60 states have call predecessors, (93), 65 states have call successors, (93) [2022-01-10 08:18:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1331 transitions. [2022-01-10 08:18:22,550 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1331 transitions. Word has length 88 [2022-01-10 08:18:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:22,550 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1331 transitions. [2022-01-10 08:18:22,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-10 08:18:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1331 transitions. [2022-01-10 08:18:22,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:22,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:22,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:22,573 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 08:18:22,759 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 08:18:22,759 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:22,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash -118977572, now seen corresponding path program 1 times [2022-01-10 08:18:22,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:22,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340149121] [2022-01-10 08:18:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:22,760 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:22,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:22,761 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 08:18:22,763 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 08:18:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:22,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:22,971 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 08:18:22,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:22,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340149121] [2022-01-10 08:18:22,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340149121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:22,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:22,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:22,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121908703] [2022-01-10 08:18:22,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:22,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:22,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:22,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:22,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:22,973 INFO L87 Difference]: Start difference. First operand 1013 states and 1331 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:23,208 INFO L93 Difference]: Finished difference Result 1209 states and 1634 transitions. [2022-01-10 08:18:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:23,211 INFO L225 Difference]: With dead ends: 1209 [2022-01-10 08:18:23,211 INFO L226 Difference]: Without dead ends: 1013 [2022-01-10 08:18:23,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:23,212 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 524 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:23,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 828 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:23,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-10 08:18:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2022-01-10 08:18:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 900 states have (on average 1.2966666666666666) internal successors, (1167), 915 states have internal predecessors, (1167), 68 states have call successors, (68), 38 states have call predecessors, (68), 43 states have return successors, (93), 60 states have call predecessors, (93), 65 states have call successors, (93) [2022-01-10 08:18:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1328 transitions. [2022-01-10 08:18:23,244 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1328 transitions. Word has length 102 [2022-01-10 08:18:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:23,244 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1328 transitions. [2022-01-10 08:18:23,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1328 transitions. [2022-01-10 08:18:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:23,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:23,246 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:23,265 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 08:18:23,453 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 08:18:23,453 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1835862176, now seen corresponding path program 1 times [2022-01-10 08:18:23,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:23,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770812494] [2022-01-10 08:18:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:23,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:23,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:23,455 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 08:18:23,457 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 08:18:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:23,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:23,731 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 08:18:23,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:23,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:23,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770812494] [2022-01-10 08:18:23,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770812494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:23,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:23,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:23,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016259481] [2022-01-10 08:18:23,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:23,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:23,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:23,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:23,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:23,733 INFO L87 Difference]: Start difference. First operand 1013 states and 1328 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:23,962 INFO L93 Difference]: Finished difference Result 1209 states and 1628 transitions. [2022-01-10 08:18:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:23,965 INFO L225 Difference]: With dead ends: 1209 [2022-01-10 08:18:23,965 INFO L226 Difference]: Without dead ends: 1013 [2022-01-10 08:18:23,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:23,966 INFO L933 BasicCegarLoop]: 378 mSDtfsCounter, 518 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:23,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 821 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:23,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-10 08:18:23,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2022-01-10 08:18:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 900 states have (on average 1.2933333333333332) internal successors, (1164), 915 states have internal predecessors, (1164), 68 states have call successors, (68), 38 states have call predecessors, (68), 43 states have return successors, (93), 60 states have call predecessors, (93), 65 states have call successors, (93) [2022-01-10 08:18:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1325 transitions. [2022-01-10 08:18:23,996 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1325 transitions. Word has length 102 [2022-01-10 08:18:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:23,996 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1325 transitions. [2022-01-10 08:18:23,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1325 transitions. [2022-01-10 08:18:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:23,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:23,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:24,007 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 08:18:24,205 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 08:18:24,205 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:24,206 INFO L85 PathProgramCache]: Analyzing trace with hash 602606428, now seen corresponding path program 1 times [2022-01-10 08:18:24,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:24,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413010459] [2022-01-10 08:18:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:24,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:24,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:24,207 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 08:18:24,209 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 08:18:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:24,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:24,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:24,404 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 08:18:24,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:24,405 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:24,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413010459] [2022-01-10 08:18:24,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413010459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:24,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:24,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:24,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087163460] [2022-01-10 08:18:24,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:24,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:24,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:24,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:24,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:24,406 INFO L87 Difference]: Start difference. First operand 1013 states and 1325 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:24,658 INFO L93 Difference]: Finished difference Result 1209 states and 1622 transitions. [2022-01-10 08:18:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:24,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:24,662 INFO L225 Difference]: With dead ends: 1209 [2022-01-10 08:18:24,662 INFO L226 Difference]: Without dead ends: 1013 [2022-01-10 08:18:24,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:24,664 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 512 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:24,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 814 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-10 08:18:24,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2022-01-10 08:18:24,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 900 states have (on average 1.29) internal successors, (1161), 915 states have internal predecessors, (1161), 68 states have call successors, (68), 38 states have call predecessors, (68), 43 states have return successors, (93), 60 states have call predecessors, (93), 65 states have call successors, (93) [2022-01-10 08:18:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1322 transitions. [2022-01-10 08:18:24,698 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1322 transitions. Word has length 102 [2022-01-10 08:18:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:24,698 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1322 transitions. [2022-01-10 08:18:24,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1322 transitions. [2022-01-10 08:18:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:24,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:24,700 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:24,720 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 08:18:24,922 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 08:18:24,923 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:24,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:24,923 INFO L85 PathProgramCache]: Analyzing trace with hash -981301280, now seen corresponding path program 1 times [2022-01-10 08:18:24,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:24,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1502312038] [2022-01-10 08:18:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:24,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:24,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:24,924 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 08:18:24,925 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 08:18:24,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:25,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:25,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:25,184 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 08:18:25,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:25,185 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:25,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1502312038] [2022-01-10 08:18:25,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1502312038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:25,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:25,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:25,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194958446] [2022-01-10 08:18:25,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:25,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:25,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:25,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:25,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:25,186 INFO L87 Difference]: Start difference. First operand 1013 states and 1322 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:25,512 INFO L93 Difference]: Finished difference Result 1209 states and 1616 transitions. [2022-01-10 08:18:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:25,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:25,515 INFO L225 Difference]: With dead ends: 1209 [2022-01-10 08:18:25,515 INFO L226 Difference]: Without dead ends: 1013 [2022-01-10 08:18:25,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:25,517 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 506 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:25,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 807 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:18:25,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-10 08:18:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2022-01-10 08:18:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 900 states have (on average 1.2866666666666666) internal successors, (1158), 915 states have internal predecessors, (1158), 68 states have call successors, (68), 38 states have call predecessors, (68), 43 states have return successors, (93), 60 states have call predecessors, (93), 65 states have call successors, (93) [2022-01-10 08:18:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1319 transitions. [2022-01-10 08:18:25,603 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1319 transitions. Word has length 102 [2022-01-10 08:18:25,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:25,603 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1319 transitions. [2022-01-10 08:18:25,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1319 transitions. [2022-01-10 08:18:25,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:25,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:25,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:25,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:25,820 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 08:18:25,820 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:25,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash 75983580, now seen corresponding path program 1 times [2022-01-10 08:18:25,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:25,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449899800] [2022-01-10 08:18:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:25,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:25,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:25,822 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 08:18:25,836 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 08:18:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:26,071 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 08:18:26,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:26,072 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:26,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449899800] [2022-01-10 08:18:26,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449899800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:26,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:26,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:26,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445071671] [2022-01-10 08:18:26,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:26,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:26,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:26,073 INFO L87 Difference]: Start difference. First operand 1013 states and 1319 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:26,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:26,317 INFO L93 Difference]: Finished difference Result 1209 states and 1610 transitions. [2022-01-10 08:18:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:18:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:26,320 INFO L225 Difference]: With dead ends: 1209 [2022-01-10 08:18:26,320 INFO L226 Difference]: Without dead ends: 1013 [2022-01-10 08:18:26,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:26,321 INFO L933 BasicCegarLoop]: 369 mSDtfsCounter, 500 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:26,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 800 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:26,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-01-10 08:18:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2022-01-10 08:18:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 900 states have (on average 1.2833333333333334) internal successors, (1155), 915 states have internal predecessors, (1155), 68 states have call successors, (68), 38 states have call predecessors, (68), 43 states have return successors, (93), 60 states have call predecessors, (93), 65 states have call successors, (93) [2022-01-10 08:18:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1316 transitions. [2022-01-10 08:18:26,356 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1316 transitions. Word has length 102 [2022-01-10 08:18:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:26,356 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1316 transitions. [2022-01-10 08:18:26,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1316 transitions. [2022-01-10 08:18:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:26,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:26,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:26,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-01-10 08:18:26,564 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 08:18:26,564 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:26,565 INFO L85 PathProgramCache]: Analyzing trace with hash 941373536, now seen corresponding path program 1 times [2022-01-10 08:18:26,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:26,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657415616] [2022-01-10 08:18:26,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:26,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:26,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:26,566 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 08:18:26,568 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 08:18:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:26,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:26,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:26,778 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 08:18:26,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:26,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:26,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657415616] [2022-01-10 08:18:26,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657415616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:26,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:26,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:26,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225077383] [2022-01-10 08:18:26,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:26,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:26,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:26,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:26,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:26,779 INFO L87 Difference]: Start difference. First operand 1013 states and 1316 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:27,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:27,055 INFO L93 Difference]: Finished difference Result 1256 states and 1677 transitions. [2022-01-10 08:18:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:27,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:27,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:27,059 INFO L225 Difference]: With dead ends: 1256 [2022-01-10 08:18:27,059 INFO L226 Difference]: Without dead ends: 1060 [2022-01-10 08:18:27,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:27,060 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 550 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:27,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 792 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-01-10 08:18:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2022-01-10 08:18:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 944 states have (on average 1.284957627118644) internal successors, (1213), 959 states have internal predecessors, (1213), 69 states have call successors, (69), 40 states have call predecessors, (69), 45 states have return successors, (94), 61 states have call predecessors, (94), 66 states have call successors, (94) [2022-01-10 08:18:27,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1376 transitions. [2022-01-10 08:18:27,139 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1376 transitions. Word has length 102 [2022-01-10 08:18:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:27,139 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1376 transitions. [2022-01-10 08:18:27,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1376 transitions. [2022-01-10 08:18:27,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:27,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:27,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:27,155 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 08:18:27,347 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 08:18:27,348 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash 767667131, now seen corresponding path program 1 times [2022-01-10 08:18:27,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:27,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910983127] [2022-01-10 08:18:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:27,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:27,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:27,364 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 08:18:27,366 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 08:18:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:27,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:27,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:27,567 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 08:18:27,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:27,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910983127] [2022-01-10 08:18:27,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1910983127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:27,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:27,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:27,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688680931] [2022-01-10 08:18:27,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:27,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:27,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:27,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:27,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:27,568 INFO L87 Difference]: Start difference. First operand 1060 states and 1376 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:27,860 INFO L93 Difference]: Finished difference Result 1350 states and 1797 transitions. [2022-01-10 08:18:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:27,860 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:27,863 INFO L225 Difference]: With dead ends: 1350 [2022-01-10 08:18:27,863 INFO L226 Difference]: Without dead ends: 1107 [2022-01-10 08:18:27,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:27,865 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 543 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:27,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 786 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2022-01-10 08:18:27,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 1107. [2022-01-10 08:18:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 988 states have (on average 1.284412955465587) internal successors, (1269), 1003 states have internal predecessors, (1269), 70 states have call successors, (70), 42 states have call predecessors, (70), 47 states have return successors, (95), 62 states have call predecessors, (95), 67 states have call successors, (95) [2022-01-10 08:18:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1434 transitions. [2022-01-10 08:18:27,907 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1434 transitions. Word has length 102 [2022-01-10 08:18:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:27,907 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1434 transitions. [2022-01-10 08:18:27,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1434 transitions. [2022-01-10 08:18:27,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:27,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:27,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:27,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:28,115 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 08:18:28,116 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:28,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1148455487, now seen corresponding path program 1 times [2022-01-10 08:18:28,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:28,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729334421] [2022-01-10 08:18:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:28,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:28,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:28,118 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 08:18:28,119 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 08:18:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:28,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:28,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:28,345 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 08:18:28,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:28,345 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:28,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729334421] [2022-01-10 08:18:28,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729334421] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:28,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:28,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:28,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247249593] [2022-01-10 08:18:28,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:28,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:28,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:28,346 INFO L87 Difference]: Start difference. First operand 1107 states and 1434 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:28,719 INFO L93 Difference]: Finished difference Result 1444 states and 1913 transitions. [2022-01-10 08:18:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:28,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:28,723 INFO L225 Difference]: With dead ends: 1444 [2022-01-10 08:18:28,723 INFO L226 Difference]: Without dead ends: 1154 [2022-01-10 08:18:28,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:28,724 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 536 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:28,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 777 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:18:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-01-10 08:18:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1154. [2022-01-10 08:18:28,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1032 states have (on average 1.2819767441860466) internal successors, (1323), 1047 states have internal predecessors, (1323), 71 states have call successors, (71), 44 states have call predecessors, (71), 49 states have return successors, (96), 63 states have call predecessors, (96), 68 states have call successors, (96) [2022-01-10 08:18:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1490 transitions. [2022-01-10 08:18:28,787 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1490 transitions. Word has length 102 [2022-01-10 08:18:28,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:28,787 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1490 transitions. [2022-01-10 08:18:28,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:28,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1490 transitions. [2022-01-10 08:18:28,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:28,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:28,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:28,812 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 08:18:28,996 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 08:18:28,996 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:28,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash -629917245, now seen corresponding path program 1 times [2022-01-10 08:18:28,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:28,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126690798] [2022-01-10 08:18:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:28,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:28,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:28,999 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 08:18:29,031 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 08:18:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:29,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:29,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:29,212 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 08:18:29,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:29,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:29,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126690798] [2022-01-10 08:18:29,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126690798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:29,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:29,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:29,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63936355] [2022-01-10 08:18:29,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:29,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:29,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:29,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:29,213 INFO L87 Difference]: Start difference. First operand 1154 states and 1490 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:29,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:29,491 INFO L93 Difference]: Finished difference Result 1538 states and 2025 transitions. [2022-01-10 08:18:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:29,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:29,495 INFO L225 Difference]: With dead ends: 1538 [2022-01-10 08:18:29,495 INFO L226 Difference]: Without dead ends: 1201 [2022-01-10 08:18:29,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:29,496 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 529 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 770 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:29,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 770 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-01-10 08:18:29,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1201. [2022-01-10 08:18:29,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1076 states have (on average 1.2778810408921932) internal successors, (1375), 1091 states have internal predecessors, (1375), 72 states have call successors, (72), 46 states have call predecessors, (72), 51 states have return successors, (97), 64 states have call predecessors, (97), 69 states have call successors, (97) [2022-01-10 08:18:29,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1544 transitions. [2022-01-10 08:18:29,543 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1544 transitions. Word has length 102 [2022-01-10 08:18:29,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:29,543 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 1544 transitions. [2022-01-10 08:18:29,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:29,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1544 transitions. [2022-01-10 08:18:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:29,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:29,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:29,557 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 08:18:29,752 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 08:18:29,753 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:29,754 INFO L85 PathProgramCache]: Analyzing trace with hash 498563102, now seen corresponding path program 1 times [2022-01-10 08:18:29,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:29,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942021886] [2022-01-10 08:18:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:29,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:29,755 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 08:18:29,769 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 08:18:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:29,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:29,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:29,959 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 08:18:29,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:29,960 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:29,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942021886] [2022-01-10 08:18:29,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942021886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:29,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:29,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:29,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003371039] [2022-01-10 08:18:29,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:29,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:29,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:29,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:29,961 INFO L87 Difference]: Start difference. First operand 1201 states and 1544 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:30,256 INFO L93 Difference]: Finished difference Result 1632 states and 2133 transitions. [2022-01-10 08:18:30,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:30,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:30,260 INFO L225 Difference]: With dead ends: 1632 [2022-01-10 08:18:30,260 INFO L226 Difference]: Without dead ends: 1248 [2022-01-10 08:18:30,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:18:30,261 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 522 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:30,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 763 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-01-10 08:18:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2022-01-10 08:18:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1120 states have (on average 1.2723214285714286) internal successors, (1425), 1135 states have internal predecessors, (1425), 73 states have call successors, (73), 48 states have call predecessors, (73), 53 states have return successors, (98), 65 states have call predecessors, (98), 70 states have call successors, (98) [2022-01-10 08:18:30,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1596 transitions. [2022-01-10 08:18:30,310 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1596 transitions. Word has length 102 [2022-01-10 08:18:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:30,310 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1596 transitions. [2022-01-10 08:18:30,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1596 transitions. [2022-01-10 08:18:30,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:30,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:30,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:30,331 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 08:18:30,518 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 08:18:30,519 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:30,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1239606719, now seen corresponding path program 1 times [2022-01-10 08:18:30,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:30,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732474756] [2022-01-10 08:18:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:30,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:30,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:30,520 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 08:18:30,522 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 08:18:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:30,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:30,747 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 08:18:30,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:30,748 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:30,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732474756] [2022-01-10 08:18:30,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732474756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:30,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:30,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:30,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828850109] [2022-01-10 08:18:30,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:30,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:30,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:30,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:30,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:30,750 INFO L87 Difference]: Start difference. First operand 1248 states and 1596 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:30,815 INFO L93 Difference]: Finished difference Result 1755 states and 2273 transitions. [2022-01-10 08:18:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:30,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:30,819 INFO L225 Difference]: With dead ends: 1755 [2022-01-10 08:18:30,819 INFO L226 Difference]: Without dead ends: 1325 [2022-01-10 08:18:30,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 08:18:30,820 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 206 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 1587 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 08:18:30,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 1587 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:30,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-01-10 08:18:30,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1251. [2022-01-10 08:18:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1123 states have (on average 1.2671415850400711) internal successors, (1423), 1138 states have internal predecessors, (1423), 73 states have call successors, (73), 48 states have call predecessors, (73), 53 states have return successors, (98), 65 states have call predecessors, (98), 70 states have call successors, (98) [2022-01-10 08:18:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1594 transitions. [2022-01-10 08:18:30,878 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1594 transitions. Word has length 102 [2022-01-10 08:18:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:30,878 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 1594 transitions. [2022-01-10 08:18:30,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1594 transitions. [2022-01-10 08:18:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:30,880 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:30,881 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:30,895 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 08:18:31,087 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 08:18:31,087 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:31,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:31,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1971574145, now seen corresponding path program 1 times [2022-01-10 08:18:31,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:31,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301747735] [2022-01-10 08:18:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:31,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:31,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:31,089 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 08:18:31,090 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 08:18:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:31,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:31,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:31,301 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 08:18:31,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:31,302 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:31,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301747735] [2022-01-10 08:18:31,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301747735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:31,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:31,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:31,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861774580] [2022-01-10 08:18:31,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:31,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:31,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:31,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:31,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:31,310 INFO L87 Difference]: Start difference. First operand 1251 states and 1594 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:31,415 INFO L93 Difference]: Finished difference Result 1747 states and 2251 transitions. [2022-01-10 08:18:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:31,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:31,420 INFO L225 Difference]: With dead ends: 1747 [2022-01-10 08:18:31,420 INFO L226 Difference]: Without dead ends: 1314 [2022-01-10 08:18:31,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 08:18:31,434 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 167 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1572 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 08:18:31,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 1572 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2022-01-10 08:18:31,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 1254. [2022-01-10 08:18:31,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1126 states have (on average 1.2619893428063944) internal successors, (1421), 1141 states have internal predecessors, (1421), 73 states have call successors, (73), 48 states have call predecessors, (73), 53 states have return successors, (98), 65 states have call predecessors, (98), 70 states have call successors, (98) [2022-01-10 08:18:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1592 transitions. [2022-01-10 08:18:31,563 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1592 transitions. Word has length 102 [2022-01-10 08:18:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:31,563 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1592 transitions. [2022-01-10 08:18:31,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1592 transitions. [2022-01-10 08:18:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:31,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:31,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:31,588 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 08:18:31,786 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 08:18:31,787 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:31,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1769750211, now seen corresponding path program 1 times [2022-01-10 08:18:31,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:31,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473986379] [2022-01-10 08:18:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:31,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:31,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:31,788 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 08:18:31,793 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 08:18:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:31,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:31,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:32,021 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 08:18:32,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:32,021 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473986379] [2022-01-10 08:18:32,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473986379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:32,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:32,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:18:32,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456556366] [2022-01-10 08:18:32,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:32,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:32,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:32,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:32,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:32,022 INFO L87 Difference]: Start difference. First operand 1254 states and 1592 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:32,091 INFO L93 Difference]: Finished difference Result 2068 states and 2644 transitions. [2022-01-10 08:18:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:32,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:32,110 INFO L225 Difference]: With dead ends: 2068 [2022-01-10 08:18:32,110 INFO L226 Difference]: Without dead ends: 1632 [2022-01-10 08:18:32,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 100 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 08:18:32,115 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 323 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 685 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 08:18:32,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 685 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2022-01-10 08:18:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1626. [2022-01-10 08:18:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1466 states have (on average 1.2653478854024556) internal successors, (1855), 1481 states have internal predecessors, (1855), 91 states have call successors, (91), 62 states have call predecessors, (91), 67 states have return successors, (116), 83 states have call predecessors, (116), 88 states have call successors, (116) [2022-01-10 08:18:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 2062 transitions. [2022-01-10 08:18:32,281 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 2062 transitions. Word has length 102 [2022-01-10 08:18:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:32,281 INFO L470 AbstractCegarLoop]: Abstraction has 1626 states and 2062 transitions. [2022-01-10 08:18:32,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 2062 transitions. [2022-01-10 08:18:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:32,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:32,287 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:32,308 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 08:18:32,493 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 08:18:32,494 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:32,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:32,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1383569692, now seen corresponding path program 1 times [2022-01-10 08:18:32,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:32,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157246451] [2022-01-10 08:18:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:32,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:32,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:32,495 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 08:18:32,504 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 08:18:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:32,729 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 08:18:32,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:32,729 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157246451] [2022-01-10 08:18:32,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157246451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:32,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:32,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:32,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56644424] [2022-01-10 08:18:32,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:32,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:32,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:32,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:32,730 INFO L87 Difference]: Start difference. First operand 1626 states and 2062 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:32,816 INFO L93 Difference]: Finished difference Result 2728 states and 3499 transitions. [2022-01-10 08:18:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:32,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:32,822 INFO L225 Difference]: With dead ends: 2728 [2022-01-10 08:18:32,822 INFO L226 Difference]: Without dead ends: 1920 [2022-01-10 08:18:32,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 08:18:32,824 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 129 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 1585 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 08:18:32,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 1585 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2022-01-10 08:18:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1644. [2022-01-10 08:18:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1484 states have (on average 1.2587601078167117) internal successors, (1868), 1499 states have internal predecessors, (1868), 91 states have call successors, (91), 62 states have call predecessors, (91), 67 states have return successors, (116), 83 states have call predecessors, (116), 88 states have call successors, (116) [2022-01-10 08:18:32,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2075 transitions. [2022-01-10 08:18:32,901 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2075 transitions. Word has length 102 [2022-01-10 08:18:32,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:32,902 INFO L470 AbstractCegarLoop]: Abstraction has 1644 states and 2075 transitions. [2022-01-10 08:18:32,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:32,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2075 transitions. [2022-01-10 08:18:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:32,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:32,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:32,923 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 08:18:33,110 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 08:18:33,110 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:33,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:33,111 INFO L85 PathProgramCache]: Analyzing trace with hash -2035378598, now seen corresponding path program 1 times [2022-01-10 08:18:33,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:33,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846384451] [2022-01-10 08:18:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:33,111 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:33,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:33,112 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 08:18:33,113 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 08:18:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:33,320 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 08:18:33,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:33,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:33,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846384451] [2022-01-10 08:18:33,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846384451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:33,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:33,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:33,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644789832] [2022-01-10 08:18:33,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:33,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:33,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:33,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:33,322 INFO L87 Difference]: Start difference. First operand 1644 states and 2075 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:33,428 INFO L93 Difference]: Finished difference Result 2505 states and 3187 transitions. [2022-01-10 08:18:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:33,439 INFO L225 Difference]: With dead ends: 2505 [2022-01-10 08:18:33,439 INFO L226 Difference]: Without dead ends: 1679 [2022-01-10 08:18:33,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 08:18:33,443 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 88 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1537 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 08:18:33,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1537 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-01-10 08:18:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1647. [2022-01-10 08:18:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1487 states have (on average 1.2515131136516475) internal successors, (1861), 1502 states have internal predecessors, (1861), 91 states have call successors, (91), 62 states have call predecessors, (91), 67 states have return successors, (116), 83 states have call predecessors, (116), 88 states have call successors, (116) [2022-01-10 08:18:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2068 transitions. [2022-01-10 08:18:33,514 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2068 transitions. Word has length 102 [2022-01-10 08:18:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:33,514 INFO L470 AbstractCegarLoop]: Abstraction has 1647 states and 2068 transitions. [2022-01-10 08:18:33,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2068 transitions. [2022-01-10 08:18:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:33,516 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:33,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:33,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:33,724 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 08:18:33,724 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash -96216552, now seen corresponding path program 1 times [2022-01-10 08:18:33,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:33,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550694827] [2022-01-10 08:18:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:33,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:33,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:33,726 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 08:18:33,728 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 08:18:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:33,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:33,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:33,924 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 08:18:33,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:33,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:33,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550694827] [2022-01-10 08:18:33,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550694827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:33,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:33,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:33,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359772679] [2022-01-10 08:18:33,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:33,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:33,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:33,926 INFO L87 Difference]: Start difference. First operand 1647 states and 2068 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:34,010 INFO L93 Difference]: Finished difference Result 2518 states and 3181 transitions. [2022-01-10 08:18:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:34,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:34,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:34,016 INFO L225 Difference]: With dead ends: 2518 [2022-01-10 08:18:34,016 INFO L226 Difference]: Without dead ends: 1689 [2022-01-10 08:18:34,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 08:18:34,018 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 49 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1522 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 08:18:34,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1522 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-01-10 08:18:34,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1653. [2022-01-10 08:18:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1493 states have (on average 1.2444742129939719) internal successors, (1858), 1508 states have internal predecessors, (1858), 91 states have call successors, (91), 62 states have call predecessors, (91), 67 states have return successors, (116), 83 states have call predecessors, (116), 88 states have call successors, (116) [2022-01-10 08:18:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2065 transitions. [2022-01-10 08:18:34,128 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2065 transitions. Word has length 102 [2022-01-10 08:18:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:34,128 INFO L470 AbstractCegarLoop]: Abstraction has 1653 states and 2065 transitions. [2022-01-10 08:18:34,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2065 transitions. [2022-01-10 08:18:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:34,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:34,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:34,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-01-10 08:18:34,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:34,336 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:34,337 INFO L85 PathProgramCache]: Analyzing trace with hash 151929942, now seen corresponding path program 1 times [2022-01-10 08:18:34,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:34,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841049389] [2022-01-10 08:18:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:34,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:34,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:34,352 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:34,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-01-10 08:18:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:34,595 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 08:18:34,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:34,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:34,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841049389] [2022-01-10 08:18:34,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841049389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:34,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:34,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:18:34,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434205726] [2022-01-10 08:18:34,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:34,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:18:34,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:34,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:18:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:18:34,596 INFO L87 Difference]: Start difference. First operand 1653 states and 2065 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:34,682 INFO L93 Difference]: Finished difference Result 2502 states and 3139 transitions. [2022-01-10 08:18:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:18:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2022-01-10 08:18:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:34,686 INFO L225 Difference]: With dead ends: 2502 [2022-01-10 08:18:34,686 INFO L226 Difference]: Without dead ends: 1667 [2022-01-10 08:18:34,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 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 08:18:34,688 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 10 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1507 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 08:18:34,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1507 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-01-10 08:18:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1659. [2022-01-10 08:18:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1499 states have (on average 1.237491661107405) internal successors, (1855), 1514 states have internal predecessors, (1855), 91 states have call successors, (91), 62 states have call predecessors, (91), 67 states have return successors, (116), 83 states have call predecessors, (116), 88 states have call successors, (116) [2022-01-10 08:18:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 2062 transitions. [2022-01-10 08:18:34,756 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 2062 transitions. Word has length 102 [2022-01-10 08:18:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:34,756 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 2062 transitions. [2022-01-10 08:18:34,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 2062 transitions. [2022-01-10 08:18:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-10 08:18:34,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:34,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:18:34,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:34,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:34,965 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:34,965 INFO L85 PathProgramCache]: Analyzing trace with hash -242436844, now seen corresponding path program 1 times [2022-01-10 08:18:34,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:34,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448090405] [2022-01-10 08:18:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:34,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:34,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:34,966 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:34,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-01-10 08:18:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:35,198 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 08:18:35,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:35,198 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:35,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448090405] [2022-01-10 08:18:35,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448090405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:35,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:35,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:18:35,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925665625] [2022-01-10 08:18:35,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:35,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:35,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:35,199 INFO L87 Difference]: Start difference. First operand 1659 states and 2062 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:18:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:35,328 INFO L93 Difference]: Finished difference Result 3303 states and 4089 transitions. [2022-01-10 08:18:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 102 [2022-01-10 08:18:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:35,333 INFO L225 Difference]: With dead ends: 3303 [2022-01-10 08:18:35,333 INFO L226 Difference]: Without dead ends: 2462 [2022-01-10 08:18:35,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 100 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 08:18:35,334 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 259 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 651 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 08:18:35,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 651 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-01-10 08:18:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2460. [2022-01-10 08:18:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2232 states have (on average 1.2258064516129032) internal successors, (2736), 2249 states have internal predecessors, (2736), 129 states have call successors, (129), 92 states have call predecessors, (129), 97 states have return successors, (154), 119 states have call predecessors, (154), 126 states have call successors, (154) [2022-01-10 08:18:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3019 transitions. [2022-01-10 08:18:35,441 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3019 transitions. Word has length 102 [2022-01-10 08:18:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:35,441 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 3019 transitions. [2022-01-10 08:18:35,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:18:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3019 transitions. [2022-01-10 08:18:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-10 08:18:35,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:35,443 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, 1, 1, 1, 1, 1, 1, 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 08:18:35,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:35,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:35,650 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:35,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:35,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1066506129, now seen corresponding path program 1 times [2022-01-10 08:18:35,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:35,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125469328] [2022-01-10 08:18:35,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:35,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:35,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:35,652 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:35,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-01-10 08:18:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:35,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:18:35,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 08:18:35,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:35,797 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:35,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125469328] [2022-01-10 08:18:35,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125469328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:35,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:35,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:35,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432308720] [2022-01-10 08:18:35,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:35,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:35,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:35,799 INFO L87 Difference]: Start difference. First operand 2460 states and 3019 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:36,015 INFO L93 Difference]: Finished difference Result 3290 states and 4066 transitions. [2022-01-10 08:18:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 103 [2022-01-10 08:18:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:36,026 INFO L225 Difference]: With dead ends: 3290 [2022-01-10 08:18:36,026 INFO L226 Difference]: Without dead ends: 2493 [2022-01-10 08:18:36,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 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 08:18:36,032 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 452 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:36,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 634 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:18:36,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-01-10 08:18:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2460. [2022-01-10 08:18:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2232 states have (on average 1.2190860215053763) internal successors, (2721), 2249 states have internal predecessors, (2721), 129 states have call successors, (129), 92 states have call predecessors, (129), 97 states have return successors, (153), 119 states have call predecessors, (153), 126 states have call successors, (153) [2022-01-10 08:18:36,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 3003 transitions. [2022-01-10 08:18:36,173 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 3003 transitions. Word has length 103 [2022-01-10 08:18:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:36,173 INFO L470 AbstractCegarLoop]: Abstraction has 2460 states and 3003 transitions. [2022-01-10 08:18:36,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:18:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 3003 transitions. [2022-01-10 08:18:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-10 08:18:36,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:36,175 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] [2022-01-10 08:18:36,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:36,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:36,382 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1561305376, now seen corresponding path program 1 times [2022-01-10 08:18:36,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:36,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288165926] [2022-01-10 08:18:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:36,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:36,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:36,384 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:36,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-01-10 08:18:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:36,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 08:18:36,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:36,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:36,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288165926] [2022-01-10 08:18:36,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288165926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:36,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:36,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:36,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394641017] [2022-01-10 08:18:36,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:36,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:36,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:36,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:36,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:36,561 INFO L87 Difference]: Start difference. First operand 2460 states and 3003 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 08:18:36,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:36,656 INFO L93 Difference]: Finished difference Result 2784 states and 3395 transitions. [2022-01-10 08:18:36,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:36,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 104 [2022-01-10 08:18:36,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:36,660 INFO L225 Difference]: With dead ends: 2784 [2022-01-10 08:18:36,660 INFO L226 Difference]: Without dead ends: 1657 [2022-01-10 08:18:36,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 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 08:18:36,661 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 55 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 783 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 08:18:36,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 783 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2022-01-10 08:18:36,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1657. [2022-01-10 08:18:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1514 states have (on average 1.2199471598414795) internal successors, (1847), 1518 states have internal predecessors, (1847), 82 states have call successors, (82), 61 states have call predecessors, (82), 60 states have return successors, (80), 78 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-10 08:18:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2009 transitions. [2022-01-10 08:18:36,771 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2009 transitions. Word has length 104 [2022-01-10 08:18:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:36,771 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 2009 transitions. [2022-01-10 08:18:36,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-10 08:18:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2009 transitions. [2022-01-10 08:18:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 08:18:36,778 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:36,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:36,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:36,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:36,985 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:36,985 INFO L85 PathProgramCache]: Analyzing trace with hash 147474731, now seen corresponding path program 1 times [2022-01-10 08:18:36,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:36,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677793480] [2022-01-10 08:18:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:36,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:36,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:36,987 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:36,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-01-10 08:18:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:37,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:18:37,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:18:37,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:37,351 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:37,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677793480] [2022-01-10 08:18:37,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677793480] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:37,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:37,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:37,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990859863] [2022-01-10 08:18:37,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:37,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:37,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:37,352 INFO L87 Difference]: Start difference. First operand 1657 states and 2009 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:37,668 INFO L93 Difference]: Finished difference Result 5015 states and 6068 transitions. [2022-01-10 08:18:37,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:37,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 165 [2022-01-10 08:18:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:37,674 INFO L225 Difference]: With dead ends: 5015 [2022-01-10 08:18:37,674 INFO L226 Difference]: Without dead ends: 3374 [2022-01-10 08:18:37,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 163 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 08:18:37,677 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 350 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:37,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 829 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2022-01-10 08:18:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3370. [2022-01-10 08:18:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3092 states have (on average 1.2089262613195342) internal successors, (3738), 3103 states have internal predecessors, (3738), 153 states have call successors, (153), 117 states have call predecessors, (153), 124 states have return successors, (171), 151 states have call predecessors, (171), 151 states have call successors, (171) [2022-01-10 08:18:37,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 4062 transitions. [2022-01-10 08:18:37,884 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 4062 transitions. Word has length 165 [2022-01-10 08:18:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:37,885 INFO L470 AbstractCegarLoop]: Abstraction has 3370 states and 4062 transitions. [2022-01-10 08:18:37,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 4062 transitions. [2022-01-10 08:18:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-10 08:18:37,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:37,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:37,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:38,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:38,097 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:38,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1128429545, now seen corresponding path program 1 times [2022-01-10 08:18:38,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:38,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243365561] [2022-01-10 08:18:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:38,097 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:38,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:38,098 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:38,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-01-10 08:18:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:38,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:18:38,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:38,410 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:38,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243365561] [2022-01-10 08:18:38,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243365561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:38,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:38,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:38,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163681012] [2022-01-10 08:18:38,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:38,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:38,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:38,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:38,411 INFO L87 Difference]: Start difference. First operand 3370 states and 4062 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (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 08:18:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:38,574 INFO L93 Difference]: Finished difference Result 6716 states and 8083 transitions. [2022-01-10 08:18:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:38,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (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 165 [2022-01-10 08:18:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:38,582 INFO L225 Difference]: With dead ends: 6716 [2022-01-10 08:18:38,582 INFO L226 Difference]: Without dead ends: 3362 [2022-01-10 08:18:38,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 08:18:38,588 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 281 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 290 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 08:18:38,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 290 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2022-01-10 08:18:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 3362. [2022-01-10 08:18:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3362 states, 3087 states have (on average 1.2076449627470036) internal successors, (3728), 3097 states have internal predecessors, (3728), 150 states have call successors, (150), 117 states have call predecessors, (150), 124 states have return successors, (168), 148 states have call predecessors, (168), 148 states have call successors, (168) [2022-01-10 08:18:38,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3362 states to 3362 states and 4046 transitions. [2022-01-10 08:18:38,798 INFO L78 Accepts]: Start accepts. Automaton has 3362 states and 4046 transitions. Word has length 165 [2022-01-10 08:18:38,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:38,798 INFO L470 AbstractCegarLoop]: Abstraction has 3362 states and 4046 transitions. [2022-01-10 08:18:38,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 2 states have call successors, (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 08:18:38,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3362 states and 4046 transitions. [2022-01-10 08:18:38,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 08:18:38,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:38,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:38,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:39,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:39,009 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:39,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:39,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1845125326, now seen corresponding path program 1 times [2022-01-10 08:18:39,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:39,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152949458] [2022-01-10 08:18:39,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:39,010 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:39,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:39,011 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:39,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-01-10 08:18:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:18:39,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:18:39,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:39,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:39,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152949458] [2022-01-10 08:18:39,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152949458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:39,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:39,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:39,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321996808] [2022-01-10 08:18:39,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:39,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:39,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:39,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:39,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:39,357 INFO L87 Difference]: Start difference. First operand 3362 states and 4046 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:39,880 INFO L93 Difference]: Finished difference Result 10489 states and 12595 transitions. [2022-01-10 08:18:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:39,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 166 [2022-01-10 08:18:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:39,907 INFO L225 Difference]: With dead ends: 10489 [2022-01-10 08:18:39,907 INFO L226 Difference]: Without dead ends: 7143 [2022-01-10 08:18:39,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 164 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 08:18:39,911 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 355 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:39,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 805 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7143 states. [2022-01-10 08:18:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7143 to 7015. [2022-01-10 08:18:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7015 states, 6443 states have (on average 1.1992860468725748) internal successors, (7727), 6484 states have internal predecessors, (7727), 289 states have call successors, (289), 225 states have call predecessors, (289), 282 states have return successors, (387), 307 states have call predecessors, (387), 287 states have call successors, (387) [2022-01-10 08:18:40,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7015 states to 7015 states and 8403 transitions. [2022-01-10 08:18:40,306 INFO L78 Accepts]: Start accepts. Automaton has 7015 states and 8403 transitions. Word has length 166 [2022-01-10 08:18:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:40,307 INFO L470 AbstractCegarLoop]: Abstraction has 7015 states and 8403 transitions. [2022-01-10 08:18:40,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 7015 states and 8403 transitions. [2022-01-10 08:18:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 08:18:40,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:40,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:40,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:40,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:40,519 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:40,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:40,519 INFO L85 PathProgramCache]: Analyzing trace with hash -864170512, now seen corresponding path program 1 times [2022-01-10 08:18:40,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:40,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687832213] [2022-01-10 08:18:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:40,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:40,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:40,536 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:40,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-01-10 08:18:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:40,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:40,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:18:40,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:40,834 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:40,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687832213] [2022-01-10 08:18:40,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687832213] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:40,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:40,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:40,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858640229] [2022-01-10 08:18:40,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:40,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:40,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:40,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:40,836 INFO L87 Difference]: Start difference. First operand 7015 states and 8403 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 08:18:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:41,339 INFO L93 Difference]: Finished difference Result 12507 states and 14984 transitions. [2022-01-10 08:18:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:41,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 166 [2022-01-10 08:18:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:41,349 INFO L225 Difference]: With dead ends: 12507 [2022-01-10 08:18:41,350 INFO L226 Difference]: Without dead ends: 5508 [2022-01-10 08:18:41,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 164 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 08:18:41,358 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 279 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 289 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 08:18:41,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 289 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:41,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2022-01-10 08:18:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 5508. [2022-01-10 08:18:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5508 states, 5065 states have (on average 1.20177690029615) internal successors, (6087), 5101 states have internal predecessors, (6087), 218 states have call successors, (218), 171 states have call predecessors, (218), 224 states have return successors, (300), 236 states have call predecessors, (300), 216 states have call successors, (300) [2022-01-10 08:18:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5508 states to 5508 states and 6605 transitions. [2022-01-10 08:18:41,670 INFO L78 Accepts]: Start accepts. Automaton has 5508 states and 6605 transitions. Word has length 166 [2022-01-10 08:18:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:41,670 INFO L470 AbstractCegarLoop]: Abstraction has 5508 states and 6605 transitions. [2022-01-10 08:18:41,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 08:18:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 5508 states and 6605 transitions. [2022-01-10 08:18:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:18:41,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:41,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:41,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-01-10 08:18:41,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:41,880 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:41,881 INFO L85 PathProgramCache]: Analyzing trace with hash -916983537, now seen corresponding path program 1 times [2022-01-10 08:18:41,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:41,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238284882] [2022-01-10 08:18:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:41,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:41,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:41,900 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:41,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-01-10 08:18:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:18:41,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:18:42,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:42,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:42,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238284882] [2022-01-10 08:18:42,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238284882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:42,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:42,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:42,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041910693] [2022-01-10 08:18:42,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:42,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:42,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:42,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:42,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:42,232 INFO L87 Difference]: Start difference. First operand 5508 states and 6605 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:42,982 INFO L93 Difference]: Finished difference Result 15732 states and 18870 transitions. [2022-01-10 08:18:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 167 [2022-01-10 08:18:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:42,999 INFO L225 Difference]: With dead ends: 15732 [2022-01-10 08:18:43,000 INFO L226 Difference]: Without dead ends: 10240 [2022-01-10 08:18:43,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 165 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 08:18:43,006 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 332 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:43,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 821 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:43,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10240 states. [2022-01-10 08:18:43,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10240 to 10236. [2022-01-10 08:18:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10236 states, 9402 states have (on average 1.1993192937672836) internal successors, (11276), 9473 states have internal predecessors, (11276), 409 states have call successors, (409), 317 states have call predecessors, (409), 424 states have return successors, (581), 447 states have call predecessors, (581), 407 states have call successors, (581) [2022-01-10 08:18:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10236 states to 10236 states and 12266 transitions. [2022-01-10 08:18:43,691 INFO L78 Accepts]: Start accepts. Automaton has 10236 states and 12266 transitions. Word has length 167 [2022-01-10 08:18:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:43,692 INFO L470 AbstractCegarLoop]: Abstraction has 10236 states and 12266 transitions. [2022-01-10 08:18:43,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 10236 states and 12266 transitions. [2022-01-10 08:18:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-10 08:18:43,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:43,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:43,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-01-10 08:18:43,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:43,905 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash 63971277, now seen corresponding path program 1 times [2022-01-10 08:18:43,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:43,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914048062] [2022-01-10 08:18:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:43,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:43,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:43,907 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:43,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-01-10 08:18:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:43,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:43,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:18:44,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:44,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:44,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914048062] [2022-01-10 08:18:44,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [914048062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:44,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:44,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:44,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847369298] [2022-01-10 08:18:44,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:44,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:44,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:44,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:44,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:44,166 INFO L87 Difference]: Start difference. First operand 10236 states and 12266 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 08:18:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:44,863 INFO L93 Difference]: Finished difference Result 20450 states and 24497 transitions. [2022-01-10 08:18:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:44,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 167 [2022-01-10 08:18:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:44,881 INFO L225 Difference]: With dead ends: 20450 [2022-01-10 08:18:44,881 INFO L226 Difference]: Without dead ends: 10230 [2022-01-10 08:18:44,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 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 08:18:44,896 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 277 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 288 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 08:18:44,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 288 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10230 states. [2022-01-10 08:18:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10230 to 10230. [2022-01-10 08:18:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10230 states, 9399 states have (on average 1.199063730184062) internal successors, (11270), 9469 states have internal predecessors, (11270), 406 states have call successors, (406), 317 states have call predecessors, (406), 424 states have return successors, (578), 444 states have call predecessors, (578), 404 states have call successors, (578) [2022-01-10 08:18:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10230 states to 10230 states and 12254 transitions. [2022-01-10 08:18:45,517 INFO L78 Accepts]: Start accepts. Automaton has 10230 states and 12254 transitions. Word has length 167 [2022-01-10 08:18:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:45,517 INFO L470 AbstractCegarLoop]: Abstraction has 10230 states and 12254 transitions. [2022-01-10 08:18:45,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 08:18:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 10230 states and 12254 transitions. [2022-01-10 08:18:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 08:18:45,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:45,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:45,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-01-10 08:18:45,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:45,730 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:45,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1198654286, now seen corresponding path program 1 times [2022-01-10 08:18:45,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:45,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1171460645] [2022-01-10 08:18:45,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:45,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:45,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:45,732 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:45,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-01-10 08:18:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:45,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:18:45,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:18:46,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:46,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:46,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1171460645] [2022-01-10 08:18:46,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1171460645] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:46,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:46,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:46,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606652194] [2022-01-10 08:18:46,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:46,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:46,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:46,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:46,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:46,141 INFO L87 Difference]: Start difference. First operand 10230 states and 12254 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:47,445 INFO L93 Difference]: Finished difference Result 29169 states and 34941 transitions. [2022-01-10 08:18:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:47,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 168 [2022-01-10 08:18:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:47,482 INFO L225 Difference]: With dead ends: 29169 [2022-01-10 08:18:47,482 INFO L226 Difference]: Without dead ends: 18955 [2022-01-10 08:18:47,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 166 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 08:18:47,498 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 329 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:47,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 780 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18955 states. [2022-01-10 08:18:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18955 to 18951. [2022-01-10 08:18:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18951 states, 17373 states have (on average 1.1963967075346802) internal successors, (20785), 17520 states have internal predecessors, (20785), 761 states have call successors, (761), 585 states have call predecessors, (761), 816 states have return successors, (1129), 847 states have call predecessors, (1129), 759 states have call successors, (1129) [2022-01-10 08:18:48,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18951 states to 18951 states and 22675 transitions. [2022-01-10 08:18:48,729 INFO L78 Accepts]: Start accepts. Automaton has 18951 states and 22675 transitions. Word has length 168 [2022-01-10 08:18:48,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:48,729 INFO L470 AbstractCegarLoop]: Abstraction has 18951 states and 22675 transitions. [2022-01-10 08:18:48,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:48,729 INFO L276 IsEmpty]: Start isEmpty. Operand 18951 states and 22675 transitions. [2022-01-10 08:18:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-10 08:18:48,743 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:48,743 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:48,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:48,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:48,950 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:48,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:48,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2115358196, now seen corresponding path program 1 times [2022-01-10 08:18:48,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:48,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062540732] [2022-01-10 08:18:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:48,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:48,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:48,952 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:48,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-01-10 08:18:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:49,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:49,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:18:49,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:49,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:49,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062540732] [2022-01-10 08:18:49,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062540732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:49,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:49,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:49,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163319078] [2022-01-10 08:18:49,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:49,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:49,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:49,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:49,227 INFO L87 Difference]: Start difference. First operand 18951 states and 22675 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 08:18:50,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:50,446 INFO L93 Difference]: Finished difference Result 37881 states and 45318 transitions. [2022-01-10 08:18:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:18:50,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 168 [2022-01-10 08:18:50,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:50,479 INFO L225 Difference]: With dead ends: 37881 [2022-01-10 08:18:50,479 INFO L226 Difference]: Without dead ends: 18946 [2022-01-10 08:18:50,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 166 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 08:18:50,497 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 275 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 287 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 08:18:50,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 287 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:18:50,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18946 states. [2022-01-10 08:18:51,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18946 to 18946. [2022-01-10 08:18:51,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18946 states, 17371 states have (on average 1.1963041851361464) internal successors, (20781), 17517 states have internal predecessors, (20781), 758 states have call successors, (758), 585 states have call predecessors, (758), 816 states have return successors, (1126), 844 states have call predecessors, (1126), 756 states have call successors, (1126) [2022-01-10 08:18:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18946 states to 18946 states and 22665 transitions. [2022-01-10 08:18:51,725 INFO L78 Accepts]: Start accepts. Automaton has 18946 states and 22665 transitions. Word has length 168 [2022-01-10 08:18:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:51,725 INFO L470 AbstractCegarLoop]: Abstraction has 18946 states and 22665 transitions. [2022-01-10 08:18:51,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 08:18:51,725 INFO L276 IsEmpty]: Start isEmpty. Operand 18946 states and 22665 transitions. [2022-01-10 08:18:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 08:18:51,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:51,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:51,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:51,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:51,946 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:51,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1083379955, now seen corresponding path program 1 times [2022-01-10 08:18:51,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:51,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1598823162] [2022-01-10 08:18:51,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:51,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:51,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:51,948 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:51,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-01-10 08:18:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:52,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:18:52,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:18:52,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:52,260 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:52,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1598823162] [2022-01-10 08:18:52,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1598823162] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:52,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:52,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:18:52,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769553014] [2022-01-10 08:18:52,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:52,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:18:52,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:52,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:18:52,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:18:52,261 INFO L87 Difference]: Start difference. First operand 18946 states and 22665 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:18:54,785 INFO L93 Difference]: Finished difference Result 53722 states and 64330 transitions. [2022-01-10 08:18:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:18:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 169 [2022-01-10 08:18:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:18:54,856 INFO L225 Difference]: With dead ends: 53722 [2022-01-10 08:18:54,856 INFO L226 Difference]: Without dead ends: 34792 [2022-01-10 08:18:54,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 167 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 08:18:54,885 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 323 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:18:54,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 743 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:18:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34792 states. [2022-01-10 08:18:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34792 to 34788. [2022-01-10 08:18:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34788 states, 31802 states have (on average 1.1954594050688636) internal successors, (38018), 32109 states have internal predecessors, (38018), 1417 states have call successors, (1417), 1073 states have call predecessors, (1417), 1568 states have return successors, (2193), 1607 states have call predecessors, (2193), 1415 states have call successors, (2193) [2022-01-10 08:18:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34788 states to 34788 states and 41628 transitions. [2022-01-10 08:18:57,070 INFO L78 Accepts]: Start accepts. Automaton has 34788 states and 41628 transitions. Word has length 169 [2022-01-10 08:18:57,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:18:57,071 INFO L470 AbstractCegarLoop]: Abstraction has 34788 states and 41628 transitions. [2022-01-10 08:18:57,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 4 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:18:57,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34788 states and 41628 transitions. [2022-01-10 08:18:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 08:18:57,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:18:57,095 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:18:57,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-01-10 08:18:57,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:18:57,303 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:18:57,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:18:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2064334769, now seen corresponding path program 1 times [2022-01-10 08:18:57,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:18:57,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459829492] [2022-01-10 08:18:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:18:57,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:18:57,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:18:57,309 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:18:57,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-01-10 08:18:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:18:57,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:18:57,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:18:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:18:57,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:18:57,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:18:57,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459829492] [2022-01-10 08:18:57,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459829492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:18:57,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:18:57,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:18:57,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289830353] [2022-01-10 08:18:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:18:57,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:18:57,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:18:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:18:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:18:57,572 INFO L87 Difference]: Start difference. First operand 34788 states and 41628 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 08:19:00,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:00,483 INFO L93 Difference]: Finished difference Result 69556 states and 83227 transitions. [2022-01-10 08:19:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:00,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 169 [2022-01-10 08:19:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:00,590 INFO L225 Difference]: With dead ends: 69556 [2022-01-10 08:19:00,590 INFO L226 Difference]: Without dead ends: 34784 [2022-01-10 08:19:00,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 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 08:19:00,639 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 273 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 286 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 08:19:00,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 286 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34784 states. [2022-01-10 08:19:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34784 to 34784. [2022-01-10 08:19:02,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34784 states, 31801 states have (on average 1.195434105845728) internal successors, (38016), 32107 states have internal predecessors, (38016), 1414 states have call successors, (1414), 1073 states have call predecessors, (1414), 1568 states have return successors, (2190), 1604 states have call predecessors, (2190), 1412 states have call successors, (2190) [2022-01-10 08:19:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34784 states to 34784 states and 41620 transitions. [2022-01-10 08:19:03,018 INFO L78 Accepts]: Start accepts. Automaton has 34784 states and 41620 transitions. Word has length 169 [2022-01-10 08:19:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:03,019 INFO L470 AbstractCegarLoop]: Abstraction has 34784 states and 41620 transitions. [2022-01-10 08:19:03,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 08:19:03,019 INFO L276 IsEmpty]: Start isEmpty. Operand 34784 states and 41620 transitions. [2022-01-10 08:19:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-10 08:19:03,036 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:03,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:03,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:03,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:03,244 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:03,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1625149290, now seen corresponding path program 1 times [2022-01-10 08:19:03,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [406317372] [2022-01-10 08:19:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:03,244 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:03,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:03,245 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:03,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-01-10 08:19:03,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:03,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:19:03,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:03,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:03,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [406317372] [2022-01-10 08:19:03,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [406317372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:03,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:03,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:03,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787441475] [2022-01-10 08:19:03,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:03,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:03,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:03,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:03,573 INFO L87 Difference]: Start difference. First operand 34784 states and 41620 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:19:07,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:07,384 INFO L93 Difference]: Finished difference Result 95685 states and 114859 transitions. [2022-01-10 08:19:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:07,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 170 [2022-01-10 08:19:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:07,484 INFO L225 Difference]: With dead ends: 95685 [2022-01-10 08:19:07,484 INFO L226 Difference]: Without dead ends: 47950 [2022-01-10 08:19:07,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 168 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 08:19:07,544 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 227 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:07,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 801 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47950 states. [2022-01-10 08:19:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47950 to 47950. [2022-01-10 08:19:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47950 states, 43767 states have (on average 1.193684739644024) internal successors, (52244), 44153 states have internal predecessors, (52244), 2022 states have call successors, (2022), 1513 states have call predecessors, (2022), 2160 states have return successors, (3155), 2284 states have call predecessors, (3155), 2020 states have call successors, (3155) [2022-01-10 08:19:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47950 states to 47950 states and 57421 transitions. [2022-01-10 08:19:10,685 INFO L78 Accepts]: Start accepts. Automaton has 47950 states and 57421 transitions. Word has length 170 [2022-01-10 08:19:10,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:10,686 INFO L470 AbstractCegarLoop]: Abstraction has 47950 states and 57421 transitions. [2022-01-10 08:19:10,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:19:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 47950 states and 57421 transitions. [2022-01-10 08:19:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-10 08:19:10,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:10,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:19:10,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:10,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:10,935 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1863194060, now seen corresponding path program 1 times [2022-01-10 08:19:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:10,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918966551] [2022-01-10 08:19:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:10,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:10,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:10,937 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:10,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-01-10 08:19:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:11,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:11,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:19:11,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:11,334 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:11,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918966551] [2022-01-10 08:19:11,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918966551] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:11,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:11,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:19:11,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719151184] [2022-01-10 08:19:11,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:11,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:11,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:11,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:11,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:11,335 INFO L87 Difference]: Start difference. First operand 47950 states and 57421 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 08:19:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:15,057 INFO L93 Difference]: Finished difference Result 109291 states and 131295 transitions. [2022-01-10 08:19:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:19:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 219 [2022-01-10 08:19:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:15,200 INFO L225 Difference]: With dead ends: 109291 [2022-01-10 08:19:15,201 INFO L226 Difference]: Without dead ends: 61356 [2022-01-10 08:19:15,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 217 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 08:19:15,271 INFO L933 BasicCegarLoop]: 297 mSDtfsCounter, 133 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 555 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 08:19:15,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 555 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:19:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61356 states. [2022-01-10 08:19:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61356 to 61212. [2022-01-10 08:19:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61212 states, 55829 states have (on average 1.1876265023554067) internal successors, (66304), 56295 states have internal predecessors, (66304), 2630 states have call successors, (2630), 1953 states have call predecessors, (2630), 2752 states have return successors, (4053), 2964 states have call predecessors, (4053), 2628 states have call successors, (4053) [2022-01-10 08:19:19,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61212 states to 61212 states and 72987 transitions. [2022-01-10 08:19:19,273 INFO L78 Accepts]: Start accepts. Automaton has 61212 states and 72987 transitions. Word has length 219 [2022-01-10 08:19:19,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:19,273 INFO L470 AbstractCegarLoop]: Abstraction has 61212 states and 72987 transitions. [2022-01-10 08:19:19,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 2 states have internal predecessors, (161), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-01-10 08:19:19,274 INFO L276 IsEmpty]: Start isEmpty. Operand 61212 states and 72987 transitions. [2022-01-10 08:19:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-10 08:19:19,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:19,339 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:19:19,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:19,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:19,546 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1022981586, now seen corresponding path program 1 times [2022-01-10 08:19:19,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:19,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731241196] [2022-01-10 08:19:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:19,548 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:19,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:19,548 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:19,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-01-10 08:19:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:19,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:19:19,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-01-10 08:19:19,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:19,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:19,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731241196] [2022-01-10 08:19:19,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731241196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:19,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:19,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:19:19,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625073665] [2022-01-10 08:19:19,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:19,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:19:19,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:19,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:19:19,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:19:19,919 INFO L87 Difference]: Start difference. First operand 61212 states and 72987 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 08:19:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:19:24,322 INFO L93 Difference]: Finished difference Result 123369 states and 147282 transitions. [2022-01-10 08:19:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:19:24,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 243 [2022-01-10 08:19:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:19:24,515 INFO L225 Difference]: With dead ends: 123369 [2022-01-10 08:19:24,515 INFO L226 Difference]: Without dead ends: 62173 [2022-01-10 08:19:24,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 241 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 08:19:24,619 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 346 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:19:24,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 657 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:19:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62173 states. [2022-01-10 08:19:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62173 to 62173. [2022-01-10 08:19:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62173 states, 56726 states have (on average 1.181680358213165) internal successors, (67032), 57224 states have internal predecessors, (67032), 2630 states have call successors, (2630), 1953 states have call predecessors, (2630), 2816 states have return successors, (3762), 2996 states have call predecessors, (3762), 2628 states have call successors, (3762) [2022-01-10 08:19:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62173 states to 62173 states and 73424 transitions. [2022-01-10 08:19:28,878 INFO L78 Accepts]: Start accepts. Automaton has 62173 states and 73424 transitions. Word has length 243 [2022-01-10 08:19:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:19:28,878 INFO L470 AbstractCegarLoop]: Abstraction has 62173 states and 73424 transitions. [2022-01-10 08:19:28,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 08:19:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 62173 states and 73424 transitions. [2022-01-10 08:19:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-10 08:19:28,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:19:28,938 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-01-10 08:19:28,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-01-10 08:19:29,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 08:19:29,140 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:19:29,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:19:29,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1276889408, now seen corresponding path program 1 times [2022-01-10 08:19:29,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:19:29,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522007504] [2022-01-10 08:19:29,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:19:29,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:19:29,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:19:29,141 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 08:19:29,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-01-10 08:19:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:19:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:19:29,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:19:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:19:29,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:19:29,595 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:19:29,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522007504] [2022-01-10 08:19:29,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522007504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:19:29,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:19:29,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:19:29,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647472019] [2022-01-10 08:19:29,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:19:29,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:19:29,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:19:29,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:19:29,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:19:29,597 INFO L87 Difference]: Start difference. First operand 62173 states and 73424 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)