/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_3.cil+token_ring.03.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:22:48,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:22:48,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:22:48,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:22:48,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:22:48,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:22:48,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:22:48,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:22:48,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:22:48,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:22:48,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:22:48,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:22:48,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:22:48,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:22:48,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:22:48,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:22:48,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:22:48,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:22:48,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:22:48,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:22:48,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:22:48,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:22:48,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:22:48,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:22:48,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 08:22:48,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 08:22:48,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 08:22:48,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 08:22:48,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 08:22:48,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 08:22:48,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 08:22:48,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 08:22:48,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 08:22:48,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 08:22:48,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 08:22:48,458 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 08:22:48,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 08:22:48,459 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 08:22:48,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:22:48,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:22:48,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:22:48,464 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 08:22:48,488 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:22:48,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:22:48,489 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:22:48,489 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:22:48,489 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:22:48,489 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:22:48,490 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:22:48,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:22:48,490 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:22:48,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:22:48,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:22:48,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:22:48,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:22:48,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:22:48,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:22:48,491 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:22:48,492 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:22:48,492 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:22:48,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:22:48,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:22:48,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:22:48,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:22:48,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:22:48,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:22:48,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:22:48,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:22:48,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:22:48,494 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:22:48,494 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:22:48,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:22:48,494 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:22:48,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:22:48,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:22:48,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:22:48,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:22:48,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:22:48,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:22:48,707 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:22:48,709 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:22:48,710 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.03.cil-1.c [2022-01-10 08:22:48,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eca98f97/a91dcdb7834c4dff836c4d18d93fd81a/FLAG18dedb4ad [2022-01-10 08:22:49,078 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:22:49,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.03.cil-1.c [2022-01-10 08:22:49,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eca98f97/a91dcdb7834c4dff836c4d18d93fd81a/FLAG18dedb4ad [2022-01-10 08:22:49,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2eca98f97/a91dcdb7834c4dff836c4d18d93fd81a [2022-01-10 08:22:49,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:22:49,480 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:22:49,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:22:49,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:22:49,484 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:22:49,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2a9d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49, skipping insertion in model container [2022-01-10 08:22:49,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:22:49,522 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:22:49,638 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_3.cil+token_ring.03.cil-1.c[911,924] [2022-01-10 08:22:49,670 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_3.cil+token_ring.03.cil-1.c[8416,8429] [2022-01-10 08:22:49,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:22:49,709 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:22:49,716 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_3.cil+token_ring.03.cil-1.c[911,924] [2022-01-10 08:22:49,740 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_3.cil+token_ring.03.cil-1.c[8416,8429] [2022-01-10 08:22:49,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:22:49,775 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:22:49,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49 WrapperNode [2022-01-10 08:22:49,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:22:49,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:22:49,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:22:49,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:22:49,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,818 INFO L137 Inliner]: procedures = 62, calls = 71, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 538 [2022-01-10 08:22:49,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:22:49,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:22:49,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:22:49,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:22:49,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:22:49,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:22:49,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:22:49,863 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:22:49,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (1/1) ... [2022-01-10 08:22:49,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:22:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:22:49,894 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 08:22:49,900 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 08:22:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:22:49,917 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:22:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:22:49,918 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-01-10 08:22:49,918 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-01-10 08:22:49,919 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:22:49,919 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:22:49,919 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:22:49,919 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:22:49,919 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-01-10 08:22:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-01-10 08:22:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:22:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:22:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:22:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:22:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-01-10 08:22:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-01-10 08:22:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:22:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-01-10 08:22:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-01-10 08:22:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-01-10 08:22:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-01-10 08:22:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:22:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:22:49,920 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:22:49,920 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:22:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-01-10 08:22:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-01-10 08:22:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:22:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:22:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:22:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:22:49,921 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-01-10 08:22:49,921 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-01-10 08:22:50,030 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:22:50,032 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:22:50,338 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1bv32 == ~q_free~0); [2022-01-10 08:22:50,338 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1bv32 == ~q_free~0;~c_dr_st~0 := 2bv32;~c_dr_pc~0 := 2bv32;~a_t~0 := do_read_c_~a~0#1; [2022-01-10 08:22:50,370 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:22:50,376 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:22:50,376 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-01-10 08:22:50,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:50 BoogieIcfgContainer [2022-01-10 08:22:50,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:22:50,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:22:50,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:22:50,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:22:50,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:22:49" (1/3) ... [2022-01-10 08:22:50,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401b20d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:22:50, skipping insertion in model container [2022-01-10 08:22:50,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:49" (2/3) ... [2022-01-10 08:22:50,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401b20d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:22:50, skipping insertion in model container [2022-01-10 08:22:50,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:50" (3/3) ... [2022-01-10 08:22:50,384 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.03.cil-1.c [2022-01-10 08:22:50,387 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:22:50,387 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:22:50,421 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:22:50,425 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 08:22:50,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:22:50,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 282 states, 229 states have (on average 1.5807860262008733) internal successors, (362), 237 states have internal predecessors, (362), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-10 08:22:50,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:22:50,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:50,459 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] [2022-01-10 08:22:50,459 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:50,465 INFO L85 PathProgramCache]: Analyzing trace with hash 806435038, now seen corresponding path program 1 times [2022-01-10 08:22:50,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:50,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137980447] [2022-01-10 08:22:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:50,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:50,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:50,487 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 08:22:50,488 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 08:22:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:50,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 08:22:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:50,824 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 08:22:50,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:50,824 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:50,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137980447] [2022-01-10 08:22:50,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137980447] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:50,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:50,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:50,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653029961] [2022-01-10 08:22:50,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:50,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:50,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:50,864 INFO L87 Difference]: Start difference. First operand has 282 states, 229 states have (on average 1.5807860262008733) internal successors, (362), 237 states have internal predecessors, (362), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:51,427 INFO L93 Difference]: Finished difference Result 663 states and 1021 transitions. [2022-01-10 08:22:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:51,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:22:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:51,440 INFO L225 Difference]: With dead ends: 663 [2022-01-10 08:22:51,440 INFO L226 Difference]: Without dead ends: 390 [2022-01-10 08:22:51,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 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 08:22:51,446 INFO L933 BasicCegarLoop]: 407 mSDtfsCounter, 338 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:51,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 1066 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-10 08:22:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 383. [2022-01-10 08:22:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 311 states have (on average 1.4694533762057878) internal successors, (457), 318 states have internal predecessors, (457), 48 states have call successors, (48), 22 states have call predecessors, (48), 22 states have return successors, (49), 45 states have call predecessors, (49), 44 states have call successors, (49) [2022-01-10 08:22:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 554 transitions. [2022-01-10 08:22:51,497 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 554 transitions. Word has length 65 [2022-01-10 08:22:51,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:51,498 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 554 transitions. [2022-01-10 08:22:51,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:51,498 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 554 transitions. [2022-01-10 08:22:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:22:51,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:51,501 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] [2022-01-10 08:22:51,515 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 08:22:51,716 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 08:22:51,716 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:51,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1809643618, now seen corresponding path program 1 times [2022-01-10 08:22:51,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:51,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016308601] [2022-01-10 08:22:51,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:51,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:51,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:51,719 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 08:22:51,720 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 08:22:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:51,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:22:51,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:51,889 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 08:22:51,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:51,889 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:51,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016308601] [2022-01-10 08:22:51,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016308601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:51,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:51,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:51,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293701445] [2022-01-10 08:22:51,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:51,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:51,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:51,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:51,892 INFO L87 Difference]: Start difference. First operand 383 states and 554 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:52,272 INFO L93 Difference]: Finished difference Result 839 states and 1214 transitions. [2022-01-10 08:22:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:52,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-01-10 08:22:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:52,277 INFO L225 Difference]: With dead ends: 839 [2022-01-10 08:22:52,277 INFO L226 Difference]: Without dead ends: 628 [2022-01-10 08:22:52,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 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 08:22:52,279 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 325 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:52,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1039 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:22:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-10 08:22:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 620. [2022-01-10 08:22:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 500 states have (on average 1.434) internal successors, (717), 515 states have internal predecessors, (717), 74 states have call successors, (74), 36 states have call predecessors, (74), 44 states have return successors, (95), 73 states have call predecessors, (95), 70 states have call successors, (95) [2022-01-10 08:22:52,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 886 transitions. [2022-01-10 08:22:52,311 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 886 transitions. Word has length 65 [2022-01-10 08:22:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:52,312 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 886 transitions. [2022-01-10 08:22:52,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 886 transitions. [2022-01-10 08:22:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:22:52,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:52,315 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] [2022-01-10 08:22:52,330 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 08:22:52,521 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 08:22:52,521 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash 322724062, now seen corresponding path program 1 times [2022-01-10 08:22:52,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:52,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696745437] [2022-01-10 08:22:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:52,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:52,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:52,525 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 08:22:52,526 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 08:22:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:52,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:52,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:52,670 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 08:22:52,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:52,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:52,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696745437] [2022-01-10 08:22:52,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696745437] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:52,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:52,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:22:52,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370572364] [2022-01-10 08:22:52,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:52,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:52,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:52,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:52,693 INFO L87 Difference]: Start difference. First operand 620 states and 886 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 08:22:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:52,739 INFO L93 Difference]: Finished difference Result 1456 states and 2043 transitions. [2022-01-10 08:22:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 65 [2022-01-10 08:22:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:52,743 INFO L225 Difference]: With dead ends: 1456 [2022-01-10 08:22:52,743 INFO L226 Difference]: Without dead ends: 1022 [2022-01-10 08:22:52,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 63 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 08:22:52,745 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 360 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:52,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 556 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-01-10 08:22:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 1010. [2022-01-10 08:22:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 812 states have (on average 1.4014778325123152) internal successors, (1138), 837 states have internal predecessors, (1138), 114 states have call successors, (114), 64 states have call predecessors, (114), 82 states have return successors, (152), 113 states have call predecessors, (152), 110 states have call successors, (152) [2022-01-10 08:22:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1404 transitions. [2022-01-10 08:22:52,778 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1404 transitions. Word has length 65 [2022-01-10 08:22:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:52,778 INFO L470 AbstractCegarLoop]: Abstraction has 1010 states and 1404 transitions. [2022-01-10 08:22:52,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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 08:22:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1404 transitions. [2022-01-10 08:22:52,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:22:52,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:52,781 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] [2022-01-10 08:22:52,787 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 08:22:52,987 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 08:22:52,988 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:52,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:52,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1389177199, now seen corresponding path program 1 times [2022-01-10 08:22:52,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:52,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382107974] [2022-01-10 08:22:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:52,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:52,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:52,990 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 08:22:52,991 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 08:22:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:53,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:22:53,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:53,144 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 08:22:53,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:53,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:53,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382107974] [2022-01-10 08:22:53,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382107974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:53,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:53,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:22:53,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421518663] [2022-01-10 08:22:53,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:53,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:22:53,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:22:53,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:53,150 INFO L87 Difference]: Start difference. First operand 1010 states and 1404 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:53,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:53,194 INFO L93 Difference]: Finished difference Result 1874 states and 2598 transitions. [2022-01-10 08:22:53,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:53,195 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-01-10 08:22:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:53,200 INFO L225 Difference]: With dead ends: 1874 [2022-01-10 08:22:53,200 INFO L226 Difference]: Without dead ends: 1050 [2022-01-10 08:22:53,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:22:53,207 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 7 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:53,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1968 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-01-10 08:22:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1030. [2022-01-10 08:22:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 828 states have (on average 1.3888888888888888) internal successors, (1150), 853 states have internal predecessors, (1150), 114 states have call successors, (114), 64 states have call predecessors, (114), 86 states have return successors, (156), 117 states have call predecessors, (156), 110 states have call successors, (156) [2022-01-10 08:22:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1420 transitions. [2022-01-10 08:22:53,254 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1420 transitions. Word has length 66 [2022-01-10 08:22:53,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:53,255 INFO L470 AbstractCegarLoop]: Abstraction has 1030 states and 1420 transitions. [2022-01-10 08:22:53,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:53,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1420 transitions. [2022-01-10 08:22:53,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:22:53,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:53,256 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] [2022-01-10 08:22:53,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:53,463 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 08:22:53,463 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:53,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:53,464 INFO L85 PathProgramCache]: Analyzing trace with hash 359817901, now seen corresponding path program 1 times [2022-01-10 08:22:53,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:53,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750361339] [2022-01-10 08:22:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:53,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:53,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:53,466 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 08:22:53,468 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 08:22:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:53,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:53,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:53,625 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 08:22:53,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:53,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:53,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750361339] [2022-01-10 08:22:53,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750361339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:53,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:53,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:22:53,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370191634] [2022-01-10 08:22:53,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:53,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:53,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:53,627 INFO L87 Difference]: Start difference. First operand 1030 states and 1420 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 08:22:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:53,671 INFO L93 Difference]: Finished difference Result 2646 states and 3600 transitions. [2022-01-10 08:22:53,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:53,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 66 [2022-01-10 08:22:53,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:53,678 INFO L225 Difference]: With dead ends: 2646 [2022-01-10 08:22:53,678 INFO L226 Difference]: Without dead ends: 1802 [2022-01-10 08:22:53,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 08:22:53,680 INFO L933 BasicCegarLoop]: 403 mSDtfsCounter, 346 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:53,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 535 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2022-01-10 08:22:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1786. [2022-01-10 08:22:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1424 states have (on average 1.3553370786516854) internal successors, (1930), 1469 states have internal predecessors, (1930), 194 states have call successors, (194), 120 states have call predecessors, (194), 166 states have return successors, (274), 201 states have call predecessors, (274), 190 states have call successors, (274) [2022-01-10 08:22:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2398 transitions. [2022-01-10 08:22:53,760 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2398 transitions. Word has length 66 [2022-01-10 08:22:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:53,761 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 2398 transitions. [2022-01-10 08:22:53,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 08:22:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2398 transitions. [2022-01-10 08:22:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:22:53,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:53,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:53,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:53,969 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 08:22:53,970 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:53,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:53,970 INFO L85 PathProgramCache]: Analyzing trace with hash -422009268, now seen corresponding path program 1 times [2022-01-10 08:22:53,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:53,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940786243] [2022-01-10 08:22:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:53,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:53,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:53,972 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 08:22:53,972 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 08:22:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:22:54,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-10 08:22:54,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:54,158 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940786243] [2022-01-10 08:22:54,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940786243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:54,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:54,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:22:54,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748482374] [2022-01-10 08:22:54,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:54,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:22:54,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:54,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:22:54,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:54,159 INFO L87 Difference]: Start difference. First operand 1786 states and 2398 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:54,214 INFO L93 Difference]: Finished difference Result 3442 states and 4618 transitions. [2022-01-10 08:22:54,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 83 [2022-01-10 08:22:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:54,221 INFO L225 Difference]: With dead ends: 3442 [2022-01-10 08:22:54,221 INFO L226 Difference]: Without dead ends: 1842 [2022-01-10 08:22:54,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:22:54,225 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 4 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:54,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1959 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:54,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-01-10 08:22:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1826. [2022-01-10 08:22:54,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1456 states have (on average 1.342032967032967) internal successors, (1954), 1501 states have internal predecessors, (1954), 194 states have call successors, (194), 120 states have call predecessors, (194), 174 states have return successors, (282), 209 states have call predecessors, (282), 190 states have call successors, (282) [2022-01-10 08:22:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2430 transitions. [2022-01-10 08:22:54,273 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2430 transitions. Word has length 83 [2022-01-10 08:22:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:54,274 INFO L470 AbstractCegarLoop]: Abstraction has 1826 states and 2430 transitions. [2022-01-10 08:22:54,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2430 transitions. [2022-01-10 08:22:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:22:54,278 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:54,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:54,286 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 08:22:54,484 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 08:22:54,485 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:54,485 INFO L85 PathProgramCache]: Analyzing trace with hash 471477070, now seen corresponding path program 1 times [2022-01-10 08:22:54,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:54,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292126130] [2022-01-10 08:22:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:54,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:54,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:54,487 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 08:22:54,488 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 08:22:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:54,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:54,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 08:22:54,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:54,655 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:54,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292126130] [2022-01-10 08:22:54,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292126130] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:54,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:54,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:54,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684767036] [2022-01-10 08:22:54,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:54,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:22:54,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:54,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:22:54,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:22:54,657 INFO L87 Difference]: Start difference. First operand 1826 states and 2430 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 08:22:54,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:54,888 INFO L93 Difference]: Finished difference Result 5062 states and 6733 transitions. [2022-01-10 08:22:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 83 [2022-01-10 08:22:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:54,901 INFO L225 Difference]: With dead ends: 5062 [2022-01-10 08:22:54,901 INFO L226 Difference]: Without dead ends: 3426 [2022-01-10 08:22:54,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 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 08:22:54,905 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 518 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:54,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 633 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:22:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2022-01-10 08:22:54,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3422. [2022-01-10 08:22:54,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 2696 states have (on average 1.3078635014836795) internal successors, (3526), 2789 states have internal predecessors, (3526), 374 states have call successors, (374), 232 states have call predecessors, (374), 350 states have return successors, (619), 409 states have call predecessors, (619), 370 states have call successors, (619) [2022-01-10 08:22:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 4519 transitions. [2022-01-10 08:22:55,001 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 4519 transitions. Word has length 83 [2022-01-10 08:22:55,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:55,001 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 4519 transitions. [2022-01-10 08:22:55,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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 08:22:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 4519 transitions. [2022-01-10 08:22:55,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:22:55,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:55,005 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] [2022-01-10 08:22:55,017 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 08:22:55,215 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 08:22:55,215 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1802213968, now seen corresponding path program 1 times [2022-01-10 08:22:55,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:55,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145819138] [2022-01-10 08:22:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:55,216 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:55,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:55,217 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 08:22:55,218 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 08:22:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:55,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:55,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:55,384 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 08:22:55,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:55,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:55,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145819138] [2022-01-10 08:22:55,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145819138] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:55,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:55,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:22:55,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489859712] [2022-01-10 08:22:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:55,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:55,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:55,386 INFO L87 Difference]: Start difference. First operand 3422 states and 4519 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 08:22:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:55,427 INFO L93 Difference]: Finished difference Result 3573 states and 4745 transitions. [2022-01-10 08:22:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:55,427 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), 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 80 [2022-01-10 08:22:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:55,439 INFO L225 Difference]: With dead ends: 3573 [2022-01-10 08:22:55,439 INFO L226 Difference]: Without dead ends: 3422 [2022-01-10 08:22:55,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 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 08:22:55,441 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 228 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 552 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 08:22:55,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 552 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2022-01-10 08:22:55,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 3422. [2022-01-10 08:22:55,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 2696 states have (on average 1.307492581602374) internal successors, (3525), 2789 states have internal predecessors, (3525), 374 states have call successors, (374), 232 states have call predecessors, (374), 350 states have return successors, (619), 409 states have call predecessors, (619), 370 states have call successors, (619) [2022-01-10 08:22:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 4518 transitions. [2022-01-10 08:22:55,559 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 4518 transitions. Word has length 80 [2022-01-10 08:22:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:55,559 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 4518 transitions. [2022-01-10 08:22:55,560 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), 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 08:22:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 4518 transitions. [2022-01-10 08:22:55,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:22:55,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:55,563 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] [2022-01-10 08:22:55,573 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 08:22:55,770 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 08:22:55,770 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:55,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:55,770 INFO L85 PathProgramCache]: Analyzing trace with hash -106243822, now seen corresponding path program 1 times [2022-01-10 08:22:55,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:55,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877857084] [2022-01-10 08:22:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:55,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:55,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:55,772 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 08:22:55,773 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 08:22:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:55,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:55,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:55,955 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 08:22:55,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:55,956 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:55,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877857084] [2022-01-10 08:22:55,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877857084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:55,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:55,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:55,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899994169] [2022-01-10 08:22:55,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:55,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:55,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:55,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:55,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:55,957 INFO L87 Difference]: Start difference. First operand 3422 states and 4518 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 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 08:22:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:56,330 INFO L93 Difference]: Finished difference Result 3730 states and 4986 transitions. [2022-01-10 08:22:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 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 80 [2022-01-10 08:22:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:56,344 INFO L225 Difference]: With dead ends: 3730 [2022-01-10 08:22:56,344 INFO L226 Difference]: Without dead ends: 3582 [2022-01-10 08:22:56,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 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 08:22:56,347 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 597 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:56,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 987 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:22:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-01-10 08:22:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3569. [2022-01-10 08:22:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2824 states have (on average 1.3179886685552409) internal successors, (3722), 2918 states have internal predecessors, (3722), 386 states have call successors, (386), 238 states have call predecessors, (386), 357 states have return successors, (632), 421 states have call predecessors, (632), 382 states have call successors, (632) [2022-01-10 08:22:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4740 transitions. [2022-01-10 08:22:56,454 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4740 transitions. Word has length 80 [2022-01-10 08:22:56,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:56,455 INFO L470 AbstractCegarLoop]: Abstraction has 3569 states and 4740 transitions. [2022-01-10 08:22:56,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 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 08:22:56,455 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4740 transitions. [2022-01-10 08:22:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:22:56,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:56,458 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] [2022-01-10 08:22:56,464 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 08:22:56,664 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 08:22:56,665 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:56,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:56,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1347684338, now seen corresponding path program 1 times [2022-01-10 08:22:56,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:56,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587037367] [2022-01-10 08:22:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:56,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:56,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:56,667 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 08:22:56,687 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 08:22:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:56,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:56,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:22:56,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:56,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:56,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587037367] [2022-01-10 08:22:56,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587037367] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:56,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:56,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:56,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721234578] [2022-01-10 08:22:56,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:56,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:56,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:56,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:56,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:56,851 INFO L87 Difference]: Start difference. First operand 3569 states and 4740 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:22:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:57,110 INFO L93 Difference]: Finished difference Result 3864 states and 5190 transitions. [2022-01-10 08:22:57,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:22:57,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 80 [2022-01-10 08:22:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:57,123 INFO L225 Difference]: With dead ends: 3864 [2022-01-10 08:22:57,123 INFO L226 Difference]: Without dead ends: 3569 [2022-01-10 08:22:57,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 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 08:22:57,127 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 491 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:57,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 745 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:22:57,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2022-01-10 08:22:57,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3569. [2022-01-10 08:22:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2824 states have (on average 1.3155099150141643) internal successors, (3715), 2918 states have internal predecessors, (3715), 386 states have call successors, (386), 238 states have call predecessors, (386), 357 states have return successors, (632), 421 states have call predecessors, (632), 382 states have call successors, (632) [2022-01-10 08:22:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4733 transitions. [2022-01-10 08:22:57,262 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4733 transitions. Word has length 80 [2022-01-10 08:22:57,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:57,262 INFO L470 AbstractCegarLoop]: Abstraction has 3569 states and 4733 transitions. [2022-01-10 08:22:57,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:22:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4733 transitions. [2022-01-10 08:22:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:22:57,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:57,266 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] [2022-01-10 08:22:57,275 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 08:22:57,472 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 08:22:57,472 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:57,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:57,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1110636142, now seen corresponding path program 1 times [2022-01-10 08:22:57,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:57,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534625133] [2022-01-10 08:22:57,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:57,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:57,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:57,474 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 08:22:57,476 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 08:22:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:57,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:57,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:57,645 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 08:22:57,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:57,645 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:57,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534625133] [2022-01-10 08:22:57,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534625133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:57,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:57,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:57,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114180897] [2022-01-10 08:22:57,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:57,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:57,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:57,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:57,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:57,646 INFO L87 Difference]: Start difference. First operand 3569 states and 4733 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:22:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:57,911 INFO L93 Difference]: Finished difference Result 3864 states and 5176 transitions. [2022-01-10 08:22:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:22:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 80 [2022-01-10 08:22:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:57,922 INFO L225 Difference]: With dead ends: 3864 [2022-01-10 08:22:57,922 INFO L226 Difference]: Without dead ends: 3569 [2022-01-10 08:22:57,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 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 08:22:57,924 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 485 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:57,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 738 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:22:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2022-01-10 08:22:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3569. [2022-01-10 08:22:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2824 states have (on average 1.3130311614730878) internal successors, (3708), 2918 states have internal predecessors, (3708), 386 states have call successors, (386), 238 states have call predecessors, (386), 357 states have return successors, (632), 421 states have call predecessors, (632), 382 states have call successors, (632) [2022-01-10 08:22:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4726 transitions. [2022-01-10 08:22:58,054 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4726 transitions. Word has length 80 [2022-01-10 08:22:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:58,054 INFO L470 AbstractCegarLoop]: Abstraction has 3569 states and 4726 transitions. [2022-01-10 08:22:58,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:22:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4726 transitions. [2022-01-10 08:22:58,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:22:58,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:58,057 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] [2022-01-10 08:22:58,071 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 08:22:58,264 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 08:22:58,264 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:58,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1102989426, now seen corresponding path program 1 times [2022-01-10 08:22:58,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:58,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1073062237] [2022-01-10 08:22:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:58,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:58,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:58,267 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 08:22:58,268 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 08:22:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:58,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:58,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:58,412 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 08:22:58,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:58,413 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:58,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1073062237] [2022-01-10 08:22:58,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1073062237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:58,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:58,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:58,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938926582] [2022-01-10 08:22:58,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:58,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:58,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:58,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:58,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:58,414 INFO L87 Difference]: Start difference. First operand 3569 states and 4726 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:22:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:58,683 INFO L93 Difference]: Finished difference Result 3864 states and 5162 transitions. [2022-01-10 08:22:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:22:58,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 80 [2022-01-10 08:22:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:58,696 INFO L225 Difference]: With dead ends: 3864 [2022-01-10 08:22:58,696 INFO L226 Difference]: Without dead ends: 3569 [2022-01-10 08:22:58,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 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 08:22:58,699 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 479 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:58,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 731 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:22:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2022-01-10 08:22:58,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3569. [2022-01-10 08:22:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 2824 states have (on average 1.3105524079320112) internal successors, (3701), 2918 states have internal predecessors, (3701), 386 states have call successors, (386), 238 states have call predecessors, (386), 357 states have return successors, (632), 421 states have call predecessors, (632), 382 states have call successors, (632) [2022-01-10 08:22:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4719 transitions. [2022-01-10 08:22:58,831 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4719 transitions. Word has length 80 [2022-01-10 08:22:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:58,832 INFO L470 AbstractCegarLoop]: Abstraction has 3569 states and 4719 transitions. [2022-01-10 08:22:58,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:22:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4719 transitions. [2022-01-10 08:22:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:22:58,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:58,835 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] [2022-01-10 08:22:58,845 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 08:22:59,042 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 08:22:59,042 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:59,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:59,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1520386032, now seen corresponding path program 1 times [2022-01-10 08:22:59,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:59,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042738064] [2022-01-10 08:22:59,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:59,043 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:59,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:59,044 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 08:22:59,045 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 08:22:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:59,229 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 08:22:59,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:59,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:59,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042738064] [2022-01-10 08:22:59,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042738064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:59,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:59,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:59,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403099580] [2022-01-10 08:22:59,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:59,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:59,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:59,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:59,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:59,231 INFO L87 Difference]: Start difference. First operand 3569 states and 4719 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:22:59,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:59,540 INFO L93 Difference]: Finished difference Result 3930 states and 5248 transitions. [2022-01-10 08:22:59,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:59,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 80 [2022-01-10 08:22:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:59,550 INFO L225 Difference]: With dead ends: 3930 [2022-01-10 08:22:59,550 INFO L226 Difference]: Without dead ends: 3635 [2022-01-10 08:22:59,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 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 08:22:59,553 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 509 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:59,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 723 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:22:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2022-01-10 08:22:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 3635. [2022-01-10 08:22:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 2884 states have (on average 1.3092926490984744) internal successors, (3776), 2978 states have internal predecessors, (3776), 388 states have call successors, (388), 242 states have call predecessors, (388), 361 states have return successors, (634), 423 states have call predecessors, (634), 384 states have call successors, (634) [2022-01-10 08:22:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 4798 transitions. [2022-01-10 08:22:59,684 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 4798 transitions. Word has length 80 [2022-01-10 08:22:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:59,684 INFO L470 AbstractCegarLoop]: Abstraction has 3635 states and 4798 transitions. [2022-01-10 08:22:59,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:22:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 4798 transitions. [2022-01-10 08:22:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:22:59,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:59,687 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] [2022-01-10 08:22:59,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-01-10 08:22:59,893 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 08:22:59,894 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:59,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash -975127284, now seen corresponding path program 1 times [2022-01-10 08:22:59,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:59,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984618175] [2022-01-10 08:22:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:59,894 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:59,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:59,895 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 08:22:59,896 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 08:22:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:59,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:59,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:00,046 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 08:23:00,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:00,046 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:00,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984618175] [2022-01-10 08:23:00,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984618175] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:00,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:00,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:00,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962036272] [2022-01-10 08:23:00,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:00,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:00,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:00,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:00,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:00,048 INFO L87 Difference]: Start difference. First operand 3635 states and 4798 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:23:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:00,378 INFO L93 Difference]: Finished difference Result 4062 states and 5406 transitions. [2022-01-10 08:23:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:00,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 80 [2022-01-10 08:23:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:00,400 INFO L225 Difference]: With dead ends: 4062 [2022-01-10 08:23:00,400 INFO L226 Difference]: Without dead ends: 3701 [2022-01-10 08:23:00,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 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 08:23:00,403 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 502 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:00,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 717 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:23:00,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2022-01-10 08:23:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 3701. [2022-01-10 08:23:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3701 states, 2944 states have (on average 1.306725543478261) internal successors, (3847), 3038 states have internal predecessors, (3847), 390 states have call successors, (390), 246 states have call predecessors, (390), 365 states have return successors, (636), 425 states have call predecessors, (636), 386 states have call successors, (636) [2022-01-10 08:23:00,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3701 states to 3701 states and 4873 transitions. [2022-01-10 08:23:00,523 INFO L78 Accepts]: Start accepts. Automaton has 3701 states and 4873 transitions. Word has length 80 [2022-01-10 08:23:00,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:00,523 INFO L470 AbstractCegarLoop]: Abstraction has 3701 states and 4873 transitions. [2022-01-10 08:23:00,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:23:00,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3701 states and 4873 transitions. [2022-01-10 08:23:00,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:23:00,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:00,526 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] [2022-01-10 08:23:00,535 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 08:23:00,733 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 08:23:00,733 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:00,733 INFO L85 PathProgramCache]: Analyzing trace with hash 613843759, now seen corresponding path program 1 times [2022-01-10 08:23:00,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:00,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508493970] [2022-01-10 08:23:00,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:00,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:00,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:00,735 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 08:23:00,735 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 08:23:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:00,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:00,896 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 08:23:00,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:00,896 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:00,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508493970] [2022-01-10 08:23:00,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508493970] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:00,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:00,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:00,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914905167] [2022-01-10 08:23:00,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:00,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:00,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:00,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:00,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:00,898 INFO L87 Difference]: Start difference. First operand 3701 states and 4873 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:23:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:01,212 INFO L93 Difference]: Finished difference Result 4194 states and 5556 transitions. [2022-01-10 08:23:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 80 [2022-01-10 08:23:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:01,220 INFO L225 Difference]: With dead ends: 4194 [2022-01-10 08:23:01,221 INFO L226 Difference]: Without dead ends: 3767 [2022-01-10 08:23:01,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 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 08:23:01,224 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 495 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:01,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 708 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:23:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2022-01-10 08:23:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3767. [2022-01-10 08:23:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3004 states have (on average 1.302929427430093) internal successors, (3914), 3098 states have internal predecessors, (3914), 392 states have call successors, (392), 250 states have call predecessors, (392), 369 states have return successors, (638), 427 states have call predecessors, (638), 388 states have call successors, (638) [2022-01-10 08:23:01,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 4944 transitions. [2022-01-10 08:23:01,354 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 4944 transitions. Word has length 80 [2022-01-10 08:23:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:01,354 INFO L470 AbstractCegarLoop]: Abstraction has 3767 states and 4944 transitions. [2022-01-10 08:23:01,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 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 08:23:01,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 4944 transitions. [2022-01-10 08:23:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:23:01,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:01,357 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] [2022-01-10 08:23:01,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:01,564 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 08:23:01,565 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -167571246, now seen corresponding path program 1 times [2022-01-10 08:23:01,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:01,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102237254] [2022-01-10 08:23:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:01,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:01,566 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 08:23:01,568 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 08:23:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:01,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:01,703 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 08:23:01,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:01,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:01,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102237254] [2022-01-10 08:23:01,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102237254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:01,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:01,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:01,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310726378] [2022-01-10 08:23:01,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:01,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:01,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:01,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:01,704 INFO L87 Difference]: Start difference. First operand 3767 states and 4944 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 08:23:01,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:01,800 INFO L93 Difference]: Finished difference Result 4357 states and 5737 transitions. [2022-01-10 08:23:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:01,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 80 [2022-01-10 08:23:01,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:01,810 INFO L225 Difference]: With dead ends: 4357 [2022-01-10 08:23:01,810 INFO L226 Difference]: Without dead ends: 3865 [2022-01-10 08:23:01,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 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 08:23:01,813 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 128 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1545 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 08:23:01,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1545 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3865 states. [2022-01-10 08:23:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3865 to 3773. [2022-01-10 08:23:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3773 states, 3010 states have (on average 1.3003322259136212) internal successors, (3914), 3104 states have internal predecessors, (3914), 392 states have call successors, (392), 250 states have call predecessors, (392), 369 states have return successors, (638), 427 states have call predecessors, (638), 388 states have call successors, (638) [2022-01-10 08:23:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3773 states to 3773 states and 4944 transitions. [2022-01-10 08:23:01,966 INFO L78 Accepts]: Start accepts. Automaton has 3773 states and 4944 transitions. Word has length 80 [2022-01-10 08:23:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:01,966 INFO L470 AbstractCegarLoop]: Abstraction has 3773 states and 4944 transitions. [2022-01-10 08:23:01,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 08:23:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3773 states and 4944 transitions. [2022-01-10 08:23:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:23:01,969 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:01,969 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] [2022-01-10 08:23:01,978 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 08:23:02,178 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 08:23:02,179 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:02,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash -648651504, now seen corresponding path program 1 times [2022-01-10 08:23:02,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:02,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038313400] [2022-01-10 08:23:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:02,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:02,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:02,181 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 08:23:02,200 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 08:23:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:02,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:02,352 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 08:23:02,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:02,353 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:02,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038313400] [2022-01-10 08:23:02,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038313400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:02,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:02,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:02,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686254971] [2022-01-10 08:23:02,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:02,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:02,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:02,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:02,354 INFO L87 Difference]: Start difference. First operand 3773 states and 4944 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 08:23:02,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:02,445 INFO L93 Difference]: Finished difference Result 4341 states and 5701 transitions. [2022-01-10 08:23:02,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:02,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 80 [2022-01-10 08:23:02,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:02,454 INFO L225 Difference]: With dead ends: 4341 [2022-01-10 08:23:02,454 INFO L226 Difference]: Without dead ends: 3843 [2022-01-10 08:23:02,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 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 08:23:02,456 INFO L933 BasicCegarLoop]: 376 mSDtfsCounter, 89 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1538 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 08:23:02,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1538 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2022-01-10 08:23:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3779. [2022-01-10 08:23:02,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 3016 states have (on average 1.2977453580901857) internal successors, (3914), 3110 states have internal predecessors, (3914), 392 states have call successors, (392), 250 states have call predecessors, (392), 369 states have return successors, (638), 427 states have call predecessors, (638), 388 states have call successors, (638) [2022-01-10 08:23:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 4944 transitions. [2022-01-10 08:23:02,575 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 4944 transitions. Word has length 80 [2022-01-10 08:23:02,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:02,575 INFO L470 AbstractCegarLoop]: Abstraction has 3779 states and 4944 transitions. [2022-01-10 08:23:02,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 08:23:02,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 4944 transitions. [2022-01-10 08:23:02,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:23:02,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:02,578 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] [2022-01-10 08:23:02,585 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 08:23:02,784 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 08:23:02,785 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:02,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:02,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1596927950, now seen corresponding path program 1 times [2022-01-10 08:23:02,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:02,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120699239] [2022-01-10 08:23:02,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:02,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:02,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:02,786 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 08:23:02,787 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 08:23:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:02,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:02,948 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 08:23:02,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:02,948 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:02,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120699239] [2022-01-10 08:23:02,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120699239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:02,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:02,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:02,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172686526] [2022-01-10 08:23:02,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:02,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:02,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:02,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:02,951 INFO L87 Difference]: Start difference. First operand 3779 states and 4944 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 08:23:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:03,047 INFO L93 Difference]: Finished difference Result 4451 states and 5829 transitions. [2022-01-10 08:23:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:03,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 80 [2022-01-10 08:23:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:03,055 INFO L225 Difference]: With dead ends: 4451 [2022-01-10 08:23:03,055 INFO L226 Difference]: Without dead ends: 3947 [2022-01-10 08:23:03,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 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 08:23:03,058 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 50 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1515 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 08:23:03,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1515 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3947 states. [2022-01-10 08:23:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3947 to 3803. [2022-01-10 08:23:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3040 states have (on average 1.2953947368421053) internal successors, (3938), 3134 states have internal predecessors, (3938), 392 states have call successors, (392), 250 states have call predecessors, (392), 369 states have return successors, (638), 427 states have call predecessors, (638), 388 states have call successors, (638) [2022-01-10 08:23:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 4968 transitions. [2022-01-10 08:23:03,192 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 4968 transitions. Word has length 80 [2022-01-10 08:23:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:03,193 INFO L470 AbstractCegarLoop]: Abstraction has 3803 states and 4968 transitions. [2022-01-10 08:23:03,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 08:23:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 4968 transitions. [2022-01-10 08:23:03,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:23:03,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:03,195 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] [2022-01-10 08:23:03,211 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 08:23:03,402 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 08:23:03,402 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:03,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:03,403 INFO L85 PathProgramCache]: Analyzing trace with hash 567568652, now seen corresponding path program 1 times [2022-01-10 08:23:03,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:03,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967519108] [2022-01-10 08:23:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:03,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:03,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:03,404 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 08:23:03,407 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 08:23:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:03,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:03,555 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 08:23:03,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:03,555 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:03,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967519108] [2022-01-10 08:23:03,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967519108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:03,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:03,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:23:03,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292165992] [2022-01-10 08:23:03,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:03,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:03,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:03,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:03,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:03,557 INFO L87 Difference]: Start difference. First operand 3803 states and 4968 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 08:23:03,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:03,654 INFO L93 Difference]: Finished difference Result 4345 states and 5673 transitions. [2022-01-10 08:23:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 80 [2022-01-10 08:23:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:03,664 INFO L225 Difference]: With dead ends: 4345 [2022-01-10 08:23:03,664 INFO L226 Difference]: Without dead ends: 3817 [2022-01-10 08:23:03,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 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 08:23:03,667 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 10 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1495 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 08:23:03,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1495 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2022-01-10 08:23:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3809. [2022-01-10 08:23:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3809 states, 3046 states have (on average 1.292843072882469) internal successors, (3938), 3140 states have internal predecessors, (3938), 392 states have call successors, (392), 250 states have call predecessors, (392), 369 states have return successors, (638), 427 states have call predecessors, (638), 388 states have call successors, (638) [2022-01-10 08:23:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 4968 transitions. [2022-01-10 08:23:03,830 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 4968 transitions. Word has length 80 [2022-01-10 08:23:03,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:03,831 INFO L470 AbstractCegarLoop]: Abstraction has 3809 states and 4968 transitions. [2022-01-10 08:23:03,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 08:23:03,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 4968 transitions. [2022-01-10 08:23:03,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:23:03,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:03,834 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] [2022-01-10 08:23:03,843 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 08:23:04,039 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 08:23:04,039 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:04,040 INFO L85 PathProgramCache]: Analyzing trace with hash 842328266, now seen corresponding path program 1 times [2022-01-10 08:23:04,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:04,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902680558] [2022-01-10 08:23:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:04,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:04,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:04,041 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 08:23:04,043 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 08:23:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:04,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:23:04,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:04,218 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 08:23:04,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:04,218 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:04,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902680558] [2022-01-10 08:23:04,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902680558] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:04,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:04,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:04,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404543441] [2022-01-10 08:23:04,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:04,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:04,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:04,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:04,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:04,219 INFO L87 Difference]: Start difference. First operand 3809 states and 4968 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:04,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:04,564 INFO L93 Difference]: Finished difference Result 4408 states and 5730 transitions. [2022-01-10 08:23:04,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:23:04,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 80 [2022-01-10 08:23:04,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:04,572 INFO L225 Difference]: With dead ends: 4408 [2022-01-10 08:23:04,572 INFO L226 Difference]: Without dead ends: 3873 [2022-01-10 08:23:04,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:23:04,575 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 464 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:04,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 715 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:23:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2022-01-10 08:23:04,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3851. [2022-01-10 08:23:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3851 states, 3086 states have (on average 1.2854828256642903) internal successors, (3967), 3180 states have internal predecessors, (3967), 392 states have call successors, (392), 252 states have call predecessors, (392), 371 states have return successors, (638), 427 states have call predecessors, (638), 388 states have call successors, (638) [2022-01-10 08:23:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 4997 transitions. [2022-01-10 08:23:04,747 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 4997 transitions. Word has length 80 [2022-01-10 08:23:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:04,748 INFO L470 AbstractCegarLoop]: Abstraction has 3851 states and 4997 transitions. [2022-01-10 08:23:04,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:23:04,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 4997 transitions. [2022-01-10 08:23:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-10 08:23:04,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:04,752 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] [2022-01-10 08:23:04,770 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 08:23:04,959 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 08:23:04,959 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:04,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:04,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1061182984, now seen corresponding path program 1 times [2022-01-10 08:23:04,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:04,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315972901] [2022-01-10 08:23:04,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:04,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:04,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:04,961 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 08:23:04,962 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 08:23:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:05,134 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 08:23:05,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:05,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:05,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315972901] [2022-01-10 08:23:05,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315972901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:05,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:05,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:23:05,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451613308] [2022-01-10 08:23:05,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:05,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:05,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:05,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:05,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:05,135 INFO L87 Difference]: Start difference. First operand 3851 states and 4997 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 08:23:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:05,253 INFO L93 Difference]: Finished difference Result 4966 states and 6358 transitions. [2022-01-10 08:23:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 80 [2022-01-10 08:23:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:05,260 INFO L225 Difference]: With dead ends: 4966 [2022-01-10 08:23:05,261 INFO L226 Difference]: Without dead ends: 4390 [2022-01-10 08:23:05,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 78 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 08:23:05,263 INFO L933 BasicCegarLoop]: 416 mSDtfsCounter, 275 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 605 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 08:23:05,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 605 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2022-01-10 08:23:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 4388. [2022-01-10 08:23:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 3565 states have (on average 1.2715287517531557) internal successors, (4533), 3662 states have internal predecessors, (4533), 423 states have call successors, (423), 278 states have call predecessors, (423), 398 states have return successors, (670), 456 states have call predecessors, (670), 419 states have call successors, (670) [2022-01-10 08:23:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 5626 transitions. [2022-01-10 08:23:05,436 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 5626 transitions. Word has length 80 [2022-01-10 08:23:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:05,436 INFO L470 AbstractCegarLoop]: Abstraction has 4388 states and 5626 transitions. [2022-01-10 08:23:05,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 08:23:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 5626 transitions. [2022-01-10 08:23:05,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 08:23:05,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:05,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:05,449 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 08:23:05,646 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 08:23:05,646 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:05,646 INFO L85 PathProgramCache]: Analyzing trace with hash -516223134, now seen corresponding path program 1 times [2022-01-10 08:23:05,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:05,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999274488] [2022-01-10 08:23:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:05,647 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:05,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:05,648 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 08:23:05,650 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 08:23:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:05,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:05,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:05,805 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 08:23:05,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:05,806 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:05,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999274488] [2022-01-10 08:23:05,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999274488] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:05,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:05,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:05,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378494080] [2022-01-10 08:23:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:05,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:05,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:05,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:05,807 INFO L87 Difference]: Start difference. First operand 4388 states and 5626 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 08:23:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:06,006 INFO L93 Difference]: Finished difference Result 10648 states and 13847 transitions. [2022-01-10 08:23:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:06,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 85 [2022-01-10 08:23:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:06,018 INFO L225 Difference]: With dead ends: 10648 [2022-01-10 08:23:06,019 INFO L226 Difference]: Without dead ends: 5956 [2022-01-10 08:23:06,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 83 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 08:23:06,027 INFO L933 BasicCegarLoop]: 491 mSDtfsCounter, 116 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 856 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 08:23:06,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 856 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:06,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5956 states. [2022-01-10 08:23:06,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5956 to 5956. [2022-01-10 08:23:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5956 states, 4789 states have (on average 1.2714554186677802) internal successors, (6089), 4926 states have internal predecessors, (6089), 587 states have call successors, (587), 390 states have call predecessors, (587), 578 states have return successors, (1002), 648 states have call predecessors, (1002), 583 states have call successors, (1002) [2022-01-10 08:23:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 7678 transitions. [2022-01-10 08:23:06,264 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 7678 transitions. Word has length 85 [2022-01-10 08:23:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:06,264 INFO L470 AbstractCegarLoop]: Abstraction has 5956 states and 7678 transitions. [2022-01-10 08:23:06,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (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 08:23:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 7678 transitions. [2022-01-10 08:23:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-10 08:23:06,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:06,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:06,281 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 08:23:06,479 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 08:23:06,480 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:06,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:06,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1229089599, now seen corresponding path program 1 times [2022-01-10 08:23:06,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:06,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986811839] [2022-01-10 08:23:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:06,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:06,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:06,481 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 08:23:06,482 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 08:23:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:06,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:06,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-10 08:23:06,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:06,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:06,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986811839] [2022-01-10 08:23:06,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986811839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:06,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:06,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:23:06,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191207182] [2022-01-10 08:23:06,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:06,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:06,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:06,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:06,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:06,723 INFO L87 Difference]: Start difference. First operand 5956 states and 7678 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (9), 2 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 08:23:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:06,921 INFO L93 Difference]: Finished difference Result 7991 states and 10137 transitions. [2022-01-10 08:23:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:06,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (9), 2 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 129 [2022-01-10 08:23:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:06,935 INFO L225 Difference]: With dead ends: 7991 [2022-01-10 08:23:06,935 INFO L226 Difference]: Without dead ends: 6878 [2022-01-10 08:23:06,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 08:23:06,939 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 278 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 603 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 08:23:06,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 603 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6878 states. [2022-01-10 08:23:07,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6878 to 6866. [2022-01-10 08:23:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6866 states, 5599 states have (on average 1.2589748169315949) internal successors, (7049), 5740 states have internal predecessors, (7049), 641 states have call successors, (641), 434 states have call predecessors, (641), 624 states have return successors, (1058), 700 states have call predecessors, (1058), 637 states have call successors, (1058) [2022-01-10 08:23:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6866 states to 6866 states and 8748 transitions. [2022-01-10 08:23:07,221 INFO L78 Accepts]: Start accepts. Automaton has 6866 states and 8748 transitions. Word has length 129 [2022-01-10 08:23:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:07,221 INFO L470 AbstractCegarLoop]: Abstraction has 6866 states and 8748 transitions. [2022-01-10 08:23:07,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 2 states have call successors, (9), 2 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 08:23:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 6866 states and 8748 transitions. [2022-01-10 08:23:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-10 08:23:07,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:07,230 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:07,239 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 08:23:07,439 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 08:23:07,440 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash -118996002, now seen corresponding path program 1 times [2022-01-10 08:23:07,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:07,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393100315] [2022-01-10 08:23:07,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:07,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:07,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:07,454 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 08:23:07,471 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 08:23:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:23:07,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:07,723 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:23:07,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:07,723 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:07,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393100315] [2022-01-10 08:23:07,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393100315] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:07,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:07,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:07,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395213488] [2022-01-10 08:23:07,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:07,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:23:07,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:23:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:23:07,724 INFO L87 Difference]: Start difference. First operand 6866 states and 8748 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 08:23:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:08,181 INFO L93 Difference]: Finished difference Result 10786 states and 13420 transitions. [2022-01-10 08:23:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:08,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 129 [2022-01-10 08:23:08,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:08,199 INFO L225 Difference]: With dead ends: 10786 [2022-01-10 08:23:08,200 INFO L226 Difference]: Without dead ends: 8764 [2022-01-10 08:23:08,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 127 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 08:23:08,206 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 434 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:08,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 842 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:23:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2022-01-10 08:23:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 8760. [2022-01-10 08:23:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8760 states, 7282 states have (on average 1.2393573194177423) internal successors, (9025), 7436 states have internal predecessors, (9025), 752 states have call successors, (752), 522 states have call predecessors, (752), 724 states have return successors, (1205), 811 states have call predecessors, (1205), 748 states have call successors, (1205) [2022-01-10 08:23:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8760 states to 8760 states and 10982 transitions. [2022-01-10 08:23:08,552 INFO L78 Accepts]: Start accepts. Automaton has 8760 states and 10982 transitions. Word has length 129 [2022-01-10 08:23:08,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:08,552 INFO L470 AbstractCegarLoop]: Abstraction has 8760 states and 10982 transitions. [2022-01-10 08:23:08,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 08:23:08,552 INFO L276 IsEmpty]: Start isEmpty. Operand 8760 states and 10982 transitions. [2022-01-10 08:23:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-10 08:23:08,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:08,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:08,573 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 08:23:08,769 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 08:23:08,769 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1211631204, now seen corresponding path program 1 times [2022-01-10 08:23:08,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:08,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266762076] [2022-01-10 08:23:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:08,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:08,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:08,771 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 08:23:08,772 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 08:23:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:08,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:08,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:23:08,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:08,977 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:08,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266762076] [2022-01-10 08:23:08,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266762076] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:08,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:08,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:08,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9435562] [2022-01-10 08:23:08,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:08,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:08,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:08,979 INFO L87 Difference]: Start difference. First operand 8760 states and 10982 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 08:23:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:09,218 INFO L93 Difference]: Finished difference Result 11768 states and 14531 transitions. [2022-01-10 08:23:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 129 [2022-01-10 08:23:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:09,232 INFO L225 Difference]: With dead ends: 11768 [2022-01-10 08:23:09,232 INFO L226 Difference]: Without dead ends: 7852 [2022-01-10 08:23:09,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 08:23:09,238 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 207 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 528 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 08:23:09,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 528 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2022-01-10 08:23:09,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 7852. [2022-01-10 08:23:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7852 states, 6477 states have (on average 1.246255982708044) internal successors, (8072), 6626 states have internal predecessors, (8072), 695 states have call successors, (695), 478 states have call predecessors, (695), 678 states have return successors, (1134), 756 states have call predecessors, (1134), 691 states have call successors, (1134) [2022-01-10 08:23:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7852 states to 7852 states and 9901 transitions. [2022-01-10 08:23:09,512 INFO L78 Accepts]: Start accepts. Automaton has 7852 states and 9901 transitions. Word has length 129 [2022-01-10 08:23:09,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:09,512 INFO L470 AbstractCegarLoop]: Abstraction has 7852 states and 9901 transitions. [2022-01-10 08:23:09,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 08:23:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 7852 states and 9901 transitions. [2022-01-10 08:23:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-10 08:23:09,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:09,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:09,533 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 08:23:09,730 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 08:23:09,731 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1318832992, now seen corresponding path program 1 times [2022-01-10 08:23:09,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:09,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [493984140] [2022-01-10 08:23:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:09,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:09,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:09,732 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 08:23:09,733 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 08:23:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:23:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:23:09,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:09,983 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:09,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [493984140] [2022-01-10 08:23:09,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [493984140] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:09,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:09,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:09,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460294523] [2022-01-10 08:23:09,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:09,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:23:09,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:23:09,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:23:09,985 INFO L87 Difference]: Start difference. First operand 7852 states and 9901 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 08:23:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:10,467 INFO L93 Difference]: Finished difference Result 13378 states and 16435 transitions. [2022-01-10 08:23:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:10,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 130 [2022-01-10 08:23:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:10,489 INFO L225 Difference]: With dead ends: 13378 [2022-01-10 08:23:10,489 INFO L226 Difference]: Without dead ends: 10370 [2022-01-10 08:23:10,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 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 08:23:10,497 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 435 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:10,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 678 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:23:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10370 states. [2022-01-10 08:23:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10370 to 10366. [2022-01-10 08:23:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 8707 states have (on average 1.2275180888939934) internal successors, (10688), 8876 states have internal predecessors, (10688), 841 states have call successors, (841), 594 states have call predecessors, (841), 816 states have return successors, (1326), 904 states have call predecessors, (1326), 837 states have call successors, (1326) [2022-01-10 08:23:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 12855 transitions. [2022-01-10 08:23:11,014 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 12855 transitions. Word has length 130 [2022-01-10 08:23:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:11,014 INFO L470 AbstractCegarLoop]: Abstraction has 10366 states and 12855 transitions. [2022-01-10 08:23:11,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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 08:23:11,015 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 12855 transitions. [2022-01-10 08:23:11,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 08:23:11,025 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:11,025 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:11,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:11,232 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 08:23:11,232 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:11,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:11,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1666321442, now seen corresponding path program 1 times [2022-01-10 08:23:11,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:11,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237776947] [2022-01-10 08:23:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:11,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:11,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:11,234 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 08:23:11,235 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 08:23:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:11,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:23:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:23:11,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:11,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:11,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237776947] [2022-01-10 08:23:11,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237776947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:11,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:11,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:11,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618326355] [2022-01-10 08:23:11,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:11,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:23:11,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:11,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:23:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:23:11,492 INFO L87 Difference]: Start difference. First operand 10366 states and 12855 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 08:23:12,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:12,132 INFO L93 Difference]: Finished difference Result 20438 states and 24744 transitions. [2022-01-10 08:23:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 131 [2022-01-10 08:23:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:12,160 INFO L225 Difference]: With dead ends: 20438 [2022-01-10 08:23:12,160 INFO L226 Difference]: Without dead ends: 14916 [2022-01-10 08:23:12,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 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 08:23:12,174 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 423 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:12,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 779 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:23:12,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14916 states. [2022-01-10 08:23:12,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14916 to 14912. [2022-01-10 08:23:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14912 states, 12714 states have (on average 1.2097687588485135) internal successors, (15381), 12932 states have internal predecessors, (15381), 1112 states have call successors, (1112), 802 states have call predecessors, (1112), 1084 states have return successors, (1705), 1187 states have call predecessors, (1705), 1108 states have call successors, (1705) [2022-01-10 08:23:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14912 states to 14912 states and 18198 transitions. [2022-01-10 08:23:12,758 INFO L78 Accepts]: Start accepts. Automaton has 14912 states and 18198 transitions. Word has length 131 [2022-01-10 08:23:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:12,758 INFO L470 AbstractCegarLoop]: Abstraction has 14912 states and 18198 transitions. [2022-01-10 08:23:12,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 08:23:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 14912 states and 18198 transitions. [2022-01-10 08:23:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-10 08:23:12,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:12,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:12,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-01-10 08:23:12,968 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 08:23:12,968 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:12,969 INFO L85 PathProgramCache]: Analyzing trace with hash 573686240, now seen corresponding path program 1 times [2022-01-10 08:23:12,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:12,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [364591448] [2022-01-10 08:23:12,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:12,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:12,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:12,970 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 08:23:12,971 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 08:23:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-01-10 08:23:13,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:13,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:13,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [364591448] [2022-01-10 08:23:13,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [364591448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:13,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:13,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:13,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153128247] [2022-01-10 08:23:13,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:13,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:13,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:13,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:13,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:13,173 INFO L87 Difference]: Start difference. First operand 14912 states and 18198 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 08:23:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:13,692 INFO L93 Difference]: Finished difference Result 24976 states and 30037 transitions. [2022-01-10 08:23:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:13,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 131 [2022-01-10 08:23:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:13,719 INFO L225 Difference]: With dead ends: 24976 [2022-01-10 08:23:13,719 INFO L226 Difference]: Without dead ends: 14908 [2022-01-10 08:23:13,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 08:23:13,733 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 204 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 527 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 08:23:13,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 527 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:13,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14908 states. [2022-01-10 08:23:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14908 to 14908. [2022-01-10 08:23:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14908 states, 12713 states have (on average 1.2097065995437741) internal successors, (15379), 12930 states have internal predecessors, (15379), 1109 states have call successors, (1109), 802 states have call predecessors, (1109), 1084 states have return successors, (1702), 1184 states have call predecessors, (1702), 1105 states have call successors, (1702) [2022-01-10 08:23:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14908 states to 14908 states and 18190 transitions. [2022-01-10 08:23:14,411 INFO L78 Accepts]: Start accepts. Automaton has 14908 states and 18190 transitions. Word has length 131 [2022-01-10 08:23:14,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:14,411 INFO L470 AbstractCegarLoop]: Abstraction has 14908 states and 18190 transitions. [2022-01-10 08:23:14,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 08:23:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 14908 states and 18190 transitions. [2022-01-10 08:23:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-10 08:23:14,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:14,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:14,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-01-10 08:23:14,621 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 08:23:14,621 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:14,621 INFO L85 PathProgramCache]: Analyzing trace with hash -626132196, now seen corresponding path program 1 times [2022-01-10 08:23:14,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:14,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637652790] [2022-01-10 08:23:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:14,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:14,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:14,624 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 08:23:14,676 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 08:23:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:14,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:14,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:23:14,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:14,868 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:14,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637652790] [2022-01-10 08:23:14,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637652790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:14,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:14,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:14,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174614731] [2022-01-10 08:23:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:14,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:14,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:14,869 INFO L87 Difference]: Start difference. First operand 14908 states and 18190 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 08:23:15,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:15,714 INFO L93 Difference]: Finished difference Result 32655 states and 39171 transitions. [2022-01-10 08:23:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:15,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 132 [2022-01-10 08:23:15,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:15,752 INFO L225 Difference]: With dead ends: 32655 [2022-01-10 08:23:15,753 INFO L226 Difference]: Without dead ends: 18792 [2022-01-10 08:23:15,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 130 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 08:23:15,774 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 160 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 900 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 08:23:15,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 900 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18792 states. [2022-01-10 08:23:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18792 to 18792. [2022-01-10 08:23:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18792 states, 16137 states have (on average 1.1982400694057136) internal successors, (19336), 16376 states have internal predecessors, (19336), 1353 states have call successors, (1353), 986 states have call predecessors, (1353), 1300 states have return successors, (2044), 1438 states have call predecessors, (2044), 1349 states have call successors, (2044) [2022-01-10 08:23:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18792 states to 18792 states and 22733 transitions. [2022-01-10 08:23:16,594 INFO L78 Accepts]: Start accepts. Automaton has 18792 states and 22733 transitions. Word has length 132 [2022-01-10 08:23:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:16,594 INFO L470 AbstractCegarLoop]: Abstraction has 18792 states and 22733 transitions. [2022-01-10 08:23:16,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 08:23:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 18792 states and 22733 transitions. [2022-01-10 08:23:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 08:23:16,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:16,606 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 08:23:16,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-01-10 08:23:16,806 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 08:23:16,806 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:16,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1098665832, now seen corresponding path program 1 times [2022-01-10 08:23:16,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:16,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265599640] [2022-01-10 08:23:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:16,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:16,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:16,808 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 08:23:16,810 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 08:23:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:23:16,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 08:23:17,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:17,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265599640] [2022-01-10 08:23:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265599640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:17,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:17,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:23:17,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017493071] [2022-01-10 08:23:17,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:17,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:23:17,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:23:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:23:17,062 INFO L87 Difference]: Start difference. First operand 18792 states and 22733 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 08:23:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:17,805 INFO L93 Difference]: Finished difference Result 23638 states and 29177 transitions. [2022-01-10 08:23:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:23:17,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 155 [2022-01-10 08:23:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:17,902 INFO L225 Difference]: With dead ends: 23638 [2022-01-10 08:23:17,902 INFO L226 Difference]: Without dead ends: 18858 [2022-01-10 08:23:17,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:23:17,909 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 37 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:17,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1841 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:17,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18858 states. [2022-01-10 08:23:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18858 to 18312. [2022-01-10 08:23:18,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18312 states, 15825 states have (on average 1.1936808846761453) internal successors, (18890), 16003 states have internal predecessors, (18890), 1257 states have call successors, (1257), 935 states have call predecessors, (1257), 1228 states have return successors, (1901), 1382 states have call predecessors, (1901), 1253 states have call successors, (1901) [2022-01-10 08:23:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18312 states to 18312 states and 22048 transitions. [2022-01-10 08:23:18,568 INFO L78 Accepts]: Start accepts. Automaton has 18312 states and 22048 transitions. Word has length 155 [2022-01-10 08:23:18,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:18,569 INFO L470 AbstractCegarLoop]: Abstraction has 18312 states and 22048 transitions. [2022-01-10 08:23:18,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 5 states have internal predecessors, (110), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-01-10 08:23:18,569 INFO L276 IsEmpty]: Start isEmpty. Operand 18312 states and 22048 transitions. [2022-01-10 08:23:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 08:23:18,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:18,579 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 08:23:18,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-01-10 08:23:18,780 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 08:23:18,780 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:18,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:18,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1619478886, now seen corresponding path program 1 times [2022-01-10 08:23:18,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:18,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502053797] [2022-01-10 08:23:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:18,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:18,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:18,782 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 08:23:18,784 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 08:23:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:18,998 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-01-10 08:23:18,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:18,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:18,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502053797] [2022-01-10 08:23:18,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502053797] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:18,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:18,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:18,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708356969] [2022-01-10 08:23:18,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:18,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:18,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:18,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:18,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:18,999 INFO L87 Difference]: Start difference. First operand 18312 states and 22048 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:23:19,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:19,566 INFO L93 Difference]: Finished difference Result 20874 states and 25366 transitions. [2022-01-10 08:23:19,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:19,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 156 [2022-01-10 08:23:19,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:19,596 INFO L225 Difference]: With dead ends: 20874 [2022-01-10 08:23:19,596 INFO L226 Difference]: Without dead ends: 16618 [2022-01-10 08:23:19,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:19,606 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 148 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 581 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 08:23:19,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 581 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16618 states. [2022-01-10 08:23:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16618 to 16618. [2022-01-10 08:23:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16618 states, 14473 states have (on average 1.186277896773302) internal successors, (17169), 14625 states have internal predecessors, (17169), 1081 states have call successors, (1081), 823 states have call predecessors, (1081), 1062 states have return successors, (1581), 1170 states have call predecessors, (1581), 1077 states have call successors, (1581) [2022-01-10 08:23:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16618 states to 16618 states and 19831 transitions. [2022-01-10 08:23:20,208 INFO L78 Accepts]: Start accepts. Automaton has 16618 states and 19831 transitions. Word has length 156 [2022-01-10 08:23:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:20,208 INFO L470 AbstractCegarLoop]: Abstraction has 16618 states and 19831 transitions. [2022-01-10 08:23:20,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:23:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 16618 states and 19831 transitions. [2022-01-10 08:23:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 08:23:20,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:20,216 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:20,223 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 08:23:20,422 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 08:23:20,423 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:20,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1942070663, now seen corresponding path program 1 times [2022-01-10 08:23:20,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:20,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463916790] [2022-01-10 08:23:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:20,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:20,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:20,424 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 08:23:20,426 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 08:23:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:20,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:20,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-01-10 08:23:20,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:20,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:20,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463916790] [2022-01-10 08:23:20,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463916790] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:20,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:20,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:20,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139449387] [2022-01-10 08:23:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:20,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:20,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:20,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:20,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:20,693 INFO L87 Difference]: Start difference. First operand 16618 states and 19831 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:23:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:21,301 INFO L93 Difference]: Finished difference Result 20740 states and 25314 transitions. [2022-01-10 08:23:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:21,301 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 159 [2022-01-10 08:23:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:21,331 INFO L225 Difference]: With dead ends: 20740 [2022-01-10 08:23:21,331 INFO L226 Difference]: Without dead ends: 18402 [2022-01-10 08:23:21,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 157 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 08:23:21,338 INFO L933 BasicCegarLoop]: 395 mSDtfsCounter, 68 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:21,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 743 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18402 states. [2022-01-10 08:23:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18402 to 18374. [2022-01-10 08:23:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18374 states, 15891 states have (on average 1.1955194764332011) internal successors, (18998), 16079 states have internal predecessors, (18998), 1237 states have call successors, (1237), 931 states have call predecessors, (1237), 1244 states have return successors, (1890), 1364 states have call predecessors, (1890), 1233 states have call successors, (1890) [2022-01-10 08:23:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18374 states to 18374 states and 22125 transitions. [2022-01-10 08:23:22,015 INFO L78 Accepts]: Start accepts. Automaton has 18374 states and 22125 transitions. Word has length 159 [2022-01-10 08:23:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:22,015 INFO L470 AbstractCegarLoop]: Abstraction has 18374 states and 22125 transitions. [2022-01-10 08:23:22,015 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:23:22,015 INFO L276 IsEmpty]: Start isEmpty. Operand 18374 states and 22125 transitions. [2022-01-10 08:23:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 08:23:22,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:22,026 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:22,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-01-10 08:23:22,226 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 08:23:22,226 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:22,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1830450428, now seen corresponding path program 1 times [2022-01-10 08:23:22,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:22,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619550390] [2022-01-10 08:23:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:22,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:22,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:22,228 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 08:23:22,229 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 08:23:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:22,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-10 08:23:22,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:22,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:22,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619550390] [2022-01-10 08:23:22,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619550390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:22,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:22,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:22,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620439458] [2022-01-10 08:23:22,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:22,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:22,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:22,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:22,459 INFO L87 Difference]: Start difference. First operand 18374 states and 22125 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:23:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:23,340 INFO L93 Difference]: Finished difference Result 26106 states and 32682 transitions. [2022-01-10 08:23:23,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:23,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 160 [2022-01-10 08:23:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:23,386 INFO L225 Difference]: With dead ends: 26106 [2022-01-10 08:23:23,387 INFO L226 Difference]: Without dead ends: 22012 [2022-01-10 08:23:23,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 158 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 08:23:23,403 INFO L933 BasicCegarLoop]: 440 mSDtfsCounter, 102 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:23,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 792 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22012 states. [2022-01-10 08:23:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22012 to 21936. [2022-01-10 08:23:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21936 states, 18753 states have (on average 1.2033274676051833) internal successors, (22566), 18991 states have internal predecessors, (22566), 1573 states have call successors, (1573), 1165 states have call predecessors, (1573), 1608 states have return successors, (2688), 1780 states have call predecessors, (2688), 1569 states have call successors, (2688) [2022-01-10 08:23:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21936 states to 21936 states and 26827 transitions. [2022-01-10 08:23:24,346 INFO L78 Accepts]: Start accepts. Automaton has 21936 states and 26827 transitions. Word has length 160 [2022-01-10 08:23:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:24,347 INFO L470 AbstractCegarLoop]: Abstraction has 21936 states and 26827 transitions. [2022-01-10 08:23:24,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:23:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 21936 states and 26827 transitions. [2022-01-10 08:23:24,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 08:23:24,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:24,359 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-01-10 08:23:24,367 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 08:23:24,565 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 08:23:24,566 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:24,566 INFO L85 PathProgramCache]: Analyzing trace with hash -580593577, now seen corresponding path program 1 times [2022-01-10 08:23:24,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:24,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365328156] [2022-01-10 08:23:24,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:24,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:24,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:24,574 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 08:23:24,577 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 08:23:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:24,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-10 08:23:24,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:24,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:24,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365328156] [2022-01-10 08:23:24,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365328156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:24,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:24,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:24,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740111117] [2022-01-10 08:23:24,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:24,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:24,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:24,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:24,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:24,838 INFO L87 Difference]: Start difference. First operand 21936 states and 26827 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 08:23:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:25,755 INFO L93 Difference]: Finished difference Result 37106 states and 47042 transitions. [2022-01-10 08:23:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:25,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 161 [2022-01-10 08:23:25,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:25,821 INFO L225 Difference]: With dead ends: 37106 [2022-01-10 08:23:25,821 INFO L226 Difference]: Without dead ends: 29450 [2022-01-10 08:23:25,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 159 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 08:23:25,845 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 72 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:25,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 748 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29450 states. [2022-01-10 08:23:26,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29450 to 29446. [2022-01-10 08:23:27,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29446 states, 24786 states have (on average 1.2142338416848222) internal successors, (30096), 25153 states have internal predecessors, (30096), 2281 states have call successors, (2281), 1651 states have call predecessors, (2281), 2377 states have return successors, (4162), 2642 states have call predecessors, (4162), 2277 states have call successors, (4162) [2022-01-10 08:23:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29446 states to 29446 states and 36539 transitions. [2022-01-10 08:23:27,067 INFO L78 Accepts]: Start accepts. Automaton has 29446 states and 36539 transitions. Word has length 161 [2022-01-10 08:23:27,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:27,067 INFO L470 AbstractCegarLoop]: Abstraction has 29446 states and 36539 transitions. [2022-01-10 08:23:27,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2022-01-10 08:23:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 29446 states and 36539 transitions. [2022-01-10 08:23:27,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 08:23:27,082 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:27,082 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:27,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:27,289 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 08:23:27,289 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2053764380, now seen corresponding path program 1 times [2022-01-10 08:23:27,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:27,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618012382] [2022-01-10 08:23:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:27,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:27,291 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 08:23:27,292 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 08:23:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:27,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-01-10 08:23:27,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:27,529 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:27,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618012382] [2022-01-10 08:23:27,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618012382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:27,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:27,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:27,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386944034] [2022-01-10 08:23:27,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:27,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:27,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:27,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:27,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:27,530 INFO L87 Difference]: Start difference. First operand 29446 states and 36539 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:23:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:29,282 INFO L93 Difference]: Finished difference Result 58999 states and 75193 transitions. [2022-01-10 08:23:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:23:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) Word has length 166 [2022-01-10 08:23:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:29,384 INFO L225 Difference]: With dead ends: 58999 [2022-01-10 08:23:29,384 INFO L226 Difference]: Without dead ends: 43518 [2022-01-10 08:23:29,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:23:29,426 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 502 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:29,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 759 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43518 states. [2022-01-10 08:23:31,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43518 to 43342. [2022-01-10 08:23:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43342 states, 35776 states have (on average 1.2234738372093024) internal successors, (43771), 36366 states have internal predecessors, (43771), 3676 states have call successors, (3676), 2602 states have call predecessors, (3676), 3888 states have return successors, (6956), 4374 states have call predecessors, (6956), 3672 states have call successors, (6956) [2022-01-10 08:23:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43342 states to 43342 states and 54403 transitions. [2022-01-10 08:23:31,275 INFO L78 Accepts]: Start accepts. Automaton has 43342 states and 54403 transitions. Word has length 166 [2022-01-10 08:23:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:31,276 INFO L470 AbstractCegarLoop]: Abstraction has 43342 states and 54403 transitions. [2022-01-10 08:23:31,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 1 states have call predecessors, (13), 2 states have call successors, (13) [2022-01-10 08:23:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 43342 states and 54403 transitions. [2022-01-10 08:23:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-10 08:23:31,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:31,487 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, 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 08:23:31,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:31,692 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 08:23:31,693 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:31,693 INFO L85 PathProgramCache]: Analyzing trace with hash -976428641, now seen corresponding path program 1 times [2022-01-10 08:23:31,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:31,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140359385] [2022-01-10 08:23:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:31,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:31,694 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 08:23:31,695 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 08:23:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:31,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:23:32,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:32,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:32,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140359385] [2022-01-10 08:23:32,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140359385] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:32,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:32,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:23:32,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590714088] [2022-01-10 08:23:32,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:32,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:32,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:32,140 INFO L87 Difference]: Start difference. First operand 43342 states and 54403 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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 08:23:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:33,786 INFO L93 Difference]: Finished difference Result 61173 states and 75393 transitions. [2022-01-10 08:23:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:33,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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 169 [2022-01-10 08:23:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:33,888 INFO L225 Difference]: With dead ends: 61173 [2022-01-10 08:23:33,889 INFO L226 Difference]: Without dead ends: 47224 [2022-01-10 08:23:33,922 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 08:23:33,923 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 243 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 570 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 08:23:33,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 570 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:33,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47224 states. [2022-01-10 08:23:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47224 to 47152. [2022-01-10 08:23:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47152 states, 39130 states have (on average 1.2151035011500129) internal successors, (47547), 39740 states have internal predecessors, (47547), 3920 states have call successors, (3920), 2786 states have call predecessors, (3920), 4100 states have return successors, (7264), 4626 states have call predecessors, (7264), 3916 states have call successors, (7264) [2022-01-10 08:23:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47152 states to 47152 states and 58731 transitions. [2022-01-10 08:23:36,125 INFO L78 Accepts]: Start accepts. Automaton has 47152 states and 58731 transitions. Word has length 169 [2022-01-10 08:23:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:36,126 INFO L470 AbstractCegarLoop]: Abstraction has 47152 states and 58731 transitions. [2022-01-10 08:23:36,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 states have internal predecessors, (123), 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 08:23:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 47152 states and 58731 transitions. [2022-01-10 08:23:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 08:23:36,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:36,149 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:36,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:36,351 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 08:23:36,351 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:36,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash 211883934, now seen corresponding path program 1 times [2022-01-10 08:23:36,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:36,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521473133] [2022-01-10 08:23:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:36,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:36,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:36,353 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 08:23:36,354 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 08:23:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-01-10 08:23:36,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:36,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:36,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521473133] [2022-01-10 08:23:36,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521473133] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:36,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:36,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:36,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132983451] [2022-01-10 08:23:36,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:36,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:23:36,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:23:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:23:36,659 INFO L87 Difference]: Start difference. First operand 47152 states and 58731 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-10 08:23:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:38,396 INFO L93 Difference]: Finished difference Result 64780 states and 81828 transitions. [2022-01-10 08:23:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:38,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 185 [2022-01-10 08:23:38,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:38,468 INFO L225 Difference]: With dead ends: 64780 [2022-01-10 08:23:38,468 INFO L226 Difference]: Without dead ends: 35445 [2022-01-10 08:23:38,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:38,501 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 432 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:38,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 595 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:23:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35445 states. [2022-01-10 08:23:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35445 to 35445. [2022-01-10 08:23:39,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35445 states, 29999 states have (on average 1.204406813560452) internal successors, (36131), 30375 states have internal predecessors, (36131), 2696 states have call successors, (2696), 1890 states have call predecessors, (2696), 2748 states have return successors, (4644), 3180 states have call predecessors, (4644), 2692 states have call successors, (4644) [2022-01-10 08:23:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35445 states to 35445 states and 43471 transitions. [2022-01-10 08:23:40,081 INFO L78 Accepts]: Start accepts. Automaton has 35445 states and 43471 transitions. Word has length 185 [2022-01-10 08:23:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:40,081 INFO L470 AbstractCegarLoop]: Abstraction has 35445 states and 43471 transitions. [2022-01-10 08:23:40,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 4 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-10 08:23:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 35445 states and 43471 transitions. [2022-01-10 08:23:40,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 08:23:40,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:40,098 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:40,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-01-10 08:23:40,298 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 08:23:40,299 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1339895180, now seen corresponding path program 2 times [2022-01-10 08:23:40,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:40,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946911999] [2022-01-10 08:23:40,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:23:40,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:40,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:40,301 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 08:23:40,302 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 08:23:40,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 08:23:40,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:23:40,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:40,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:23:40,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:40,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:40,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946911999] [2022-01-10 08:23:40,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946911999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:40,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:40,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:40,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24573923] [2022-01-10 08:23:40,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:40,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:40,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:40,547 INFO L87 Difference]: Start difference. First operand 35445 states and 43471 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:23:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:42,583 INFO L93 Difference]: Finished difference Result 69911 states and 87931 transitions. [2022-01-10 08:23:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 185 [2022-01-10 08:23:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:42,704 INFO L225 Difference]: With dead ends: 69911 [2022-01-10 08:23:42,705 INFO L226 Difference]: Without dead ends: 52380 [2022-01-10 08:23:42,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:42,832 INFO L933 BasicCegarLoop]: 455 mSDtfsCounter, 341 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:42,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 601 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:42,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52380 states. [2022-01-10 08:23:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52380 to 52203. [2022-01-10 08:23:45,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52203 states, 43489 states have (on average 1.2166064981949458) internal successors, (52909), 44031 states have internal predecessors, (52909), 4298 states have call successors, (4298), 2932 states have call predecessors, (4298), 4414 states have return successors, (7725), 5240 states have call predecessors, (7725), 4294 states have call successors, (7725) [2022-01-10 08:23:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52203 states to 52203 states and 64932 transitions. [2022-01-10 08:23:45,324 INFO L78 Accepts]: Start accepts. Automaton has 52203 states and 64932 transitions. Word has length 185 [2022-01-10 08:23:45,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:45,325 INFO L470 AbstractCegarLoop]: Abstraction has 52203 states and 64932 transitions. [2022-01-10 08:23:45,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-01-10 08:23:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 52203 states and 64932 transitions. [2022-01-10 08:23:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 08:23:45,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:45,338 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:45,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-01-10 08:23:45,538 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 08:23:45,538 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:45,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:45,539 INFO L85 PathProgramCache]: Analyzing trace with hash -164103182, now seen corresponding path program 1 times [2022-01-10 08:23:45,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:45,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704304290] [2022-01-10 08:23:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:45,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:45,540 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 08:23:45,541 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 08:23:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:45,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-10 08:23:45,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:45,820 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:45,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704304290] [2022-01-10 08:23:45,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704304290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:45,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:45,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:45,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333364221] [2022-01-10 08:23:45,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:45,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:45,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:45,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:45,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:45,822 INFO L87 Difference]: Start difference. First operand 52203 states and 64932 transitions. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:23:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:47,927 INFO L93 Difference]: Finished difference Result 86267 states and 108662 transitions. [2022-01-10 08:23:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:47,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) Word has length 185 [2022-01-10 08:23:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:48,051 INFO L225 Difference]: With dead ends: 86267 [2022-01-10 08:23:48,051 INFO L226 Difference]: Without dead ends: 51929 [2022-01-10 08:23:48,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:48,096 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 115 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 787 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 08:23:48,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 787 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51929 states. [2022-01-10 08:23:50,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51929 to 51925. [2022-01-10 08:23:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51925 states, 43229 states have (on average 1.2038677739480441) internal successors, (52042), 43835 states have internal predecessors, (52042), 4289 states have call successors, (4289), 2923 states have call predecessors, (4289), 4405 states have return successors, (6943), 5167 states have call predecessors, (6943), 4285 states have call successors, (6943) [2022-01-10 08:23:50,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51925 states to 51925 states and 63274 transitions. [2022-01-10 08:23:50,491 INFO L78 Accepts]: Start accepts. Automaton has 51925 states and 63274 transitions. Word has length 185 [2022-01-10 08:23:50,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:50,492 INFO L470 AbstractCegarLoop]: Abstraction has 51925 states and 63274 transitions. [2022-01-10 08:23:50,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 3 states have call successors, (17) [2022-01-10 08:23:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 51925 states and 63274 transitions. [2022-01-10 08:23:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-10 08:23:50,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:50,503 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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 08:23:50,513 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 08:23:50,711 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 08:23:50,712 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1916575538, now seen corresponding path program 1 times [2022-01-10 08:23:50,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:50,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027786511] [2022-01-10 08:23:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:50,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:50,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:50,713 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 08:23:50,714 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 08:23:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:50,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-10 08:23:50,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:50,988 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027786511] [2022-01-10 08:23:50,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027786511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:50,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:50,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:50,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26869539] [2022-01-10 08:23:50,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:50,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:50,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:50,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:50,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:50,990 INFO L87 Difference]: Start difference. First operand 51925 states and 63274 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-01-10 08:23:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:52,095 INFO L93 Difference]: Finished difference Result 56919 states and 69479 transitions. [2022-01-10 08:23:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:52,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 191 [2022-01-10 08:23:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:52,135 INFO L225 Difference]: With dead ends: 56919 [2022-01-10 08:23:52,135 INFO L226 Difference]: Without dead ends: 17772 [2022-01-10 08:23:52,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 189 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 08:23:52,184 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 80 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:52,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 678 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:52,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17772 states. [2022-01-10 08:23:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17772 to 17772. [2022-01-10 08:23:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17772 states, 15705 states have (on average 1.1609678446354663) internal successors, (18233), 15833 states have internal predecessors, (18233), 1078 states have call successors, (1078), 833 states have call predecessors, (1078), 988 states have return successors, (1418), 1106 states have call predecessors, (1418), 1076 states have call successors, (1418) [2022-01-10 08:23:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17772 states to 17772 states and 20729 transitions. [2022-01-10 08:23:53,135 INFO L78 Accepts]: Start accepts. Automaton has 17772 states and 20729 transitions. Word has length 191 [2022-01-10 08:23:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:53,135 INFO L470 AbstractCegarLoop]: Abstraction has 17772 states and 20729 transitions. [2022-01-10 08:23:53,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-01-10 08:23:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 17772 states and 20729 transitions. [2022-01-10 08:23:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-10 08:23:53,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:53,144 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, 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] [2022-01-10 08:23:53,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-01-10 08:23:53,345 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 08:23:53,345 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:53,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1347083257, now seen corresponding path program 1 times [2022-01-10 08:23:53,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:53,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123573981] [2022-01-10 08:23:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:53,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:53,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:53,347 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 08:23:53,348 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 08:23:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:53,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:53,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-01-10 08:23:53,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:53,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:53,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123573981] [2022-01-10 08:23:53,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123573981] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:53,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:53,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:53,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773567706] [2022-01-10 08:23:53,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:53,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:23:53,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:53,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:23:53,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:23:53,640 INFO L87 Difference]: Start difference. First operand 17772 states and 20729 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 08:23:54,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:54,707 INFO L93 Difference]: Finished difference Result 35736 states and 41800 transitions. [2022-01-10 08:23:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:54,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 189 [2022-01-10 08:23:54,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:54,738 INFO L225 Difference]: With dead ends: 35736 [2022-01-10 08:23:54,739 INFO L226 Difference]: Without dead ends: 17978 [2022-01-10 08:23:54,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 187 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 08:23:54,756 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 233 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:54,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 482 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:23:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17978 states. [2022-01-10 08:23:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17978 to 17978. [2022-01-10 08:23:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17978 states, 15887 states have (on average 1.1514445773273745) internal successors, (18293), 16027 states have internal predecessors, (18293), 1078 states have call successors, (1078), 833 states have call predecessors, (1078), 1012 states have return successors, (1316), 1118 states have call predecessors, (1316), 1076 states have call successors, (1316) [2022-01-10 08:23:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17978 states to 17978 states and 20687 transitions. [2022-01-10 08:23:55,635 INFO L78 Accepts]: Start accepts. Automaton has 17978 states and 20687 transitions. Word has length 189 [2022-01-10 08:23:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:55,635 INFO L470 AbstractCegarLoop]: Abstraction has 17978 states and 20687 transitions. [2022-01-10 08:23:55,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 08:23:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17978 states and 20687 transitions. [2022-01-10 08:23:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-10 08:23:55,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:55,643 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, 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] [2022-01-10 08:23:55,650 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 08:23:55,843 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 08:23:55,843 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:55,844 INFO L85 PathProgramCache]: Analyzing trace with hash 431670805, now seen corresponding path program 1 times [2022-01-10 08:23:55,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:55,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373598490] [2022-01-10 08:23:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:55,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:55,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:55,845 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 08:23:55,845 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 08:23:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:23:56,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:56,109 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:56,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373598490] [2022-01-10 08:23:56,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373598490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:56,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:56,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:56,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280218973] [2022-01-10 08:23:56,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:56,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:56,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:56,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:56,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:56,110 INFO L87 Difference]: Start difference. First operand 17978 states and 20687 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2022-01-10 08:23:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:56,863 INFO L93 Difference]: Finished difference Result 32154 states and 37097 transitions. [2022-01-10 08:23:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:56,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) Word has length 190 [2022-01-10 08:23:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:56,898 INFO L225 Difference]: With dead ends: 32154 [2022-01-10 08:23:56,898 INFO L226 Difference]: Without dead ends: 17982 [2022-01-10 08:23:56,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 188 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 08:23:56,920 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 163 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:56,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 574 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17982 states. [2022-01-10 08:23:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17982 to 17978. [2022-01-10 08:23:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17978 states, 15887 states have (on average 1.1490526845848807) internal successors, (18255), 16027 states have internal predecessors, (18255), 1078 states have call successors, (1078), 833 states have call predecessors, (1078), 1012 states have return successors, (1310), 1118 states have call predecessors, (1310), 1076 states have call successors, (1310) [2022-01-10 08:23:57,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17978 states to 17978 states and 20643 transitions. [2022-01-10 08:23:57,741 INFO L78 Accepts]: Start accepts. Automaton has 17978 states and 20643 transitions. Word has length 190 [2022-01-10 08:23:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:57,741 INFO L470 AbstractCegarLoop]: Abstraction has 17978 states and 20643 transitions. [2022-01-10 08:23:57,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 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) [2022-01-10 08:23:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 17978 states and 20643 transitions. [2022-01-10 08:23:57,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-10 08:23:57,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:57,750 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:57,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-01-10 08:23:57,950 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 08:23:57,951 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:57,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:57,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1334548150, now seen corresponding path program 1 times [2022-01-10 08:23:57,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:57,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207854886] [2022-01-10 08:23:57,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:57,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:57,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:57,952 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 08:23:57,953 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 08:23:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:58,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-01-10 08:23:58,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:58,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:58,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207854886] [2022-01-10 08:23:58,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207854886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:58,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:58,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:23:58,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669480172] [2022-01-10 08:23:58,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:58,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:58,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:58,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:58,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:58,373 INFO L87 Difference]: Start difference. First operand 17978 states and 20643 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11)