/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.01.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:22:41,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:22:41,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:22:41,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:22:41,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:22:41,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:22:41,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:22:41,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:22:41,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:22:41,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:22:41,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:22:41,452 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:22:41,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:22:41,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:22:41,453 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:22:41,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:22:41,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:22:41,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:22:41,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:22:41,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:22:41,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:22:41,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:22:41,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:22:41,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:22:41,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:22:41,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:22:41,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:22:41,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:22:41,474 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 08:22:41,503 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:22:41,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:22:41,504 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:22:41,504 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:22:41,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 08:22:41,505 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 08:22:41,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:22:41,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:22:41,505 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:22:41,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:22:41,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:22:41,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:22:41,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:22:41,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:22:41,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:22:41,506 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:22:41,507 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:22:41,507 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:22:41,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:22:41,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:22:41,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:22:41,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:22:41,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:22:41,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:22:41,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:22:41,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:22:41,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:22:41,508 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 08:22:41,508 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 08:22:41,508 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:22:41,508 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:22:41,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:22:41,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:22:41,509 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:22:41,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:22:41,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:22:41,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:22:41,722 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:22:41,723 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:22:41,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c [2022-01-10 08:22:41,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44070d5ec/985c366c85194a0296a066141d450fad/FLAG994e35de4 [2022-01-10 08:22:42,082 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:22:42,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/combinations/pc_sfifo_3.cil+token_ring.01.cil-1.c [2022-01-10 08:22:42,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44070d5ec/985c366c85194a0296a066141d450fad/FLAG994e35de4 [2022-01-10 08:22:42,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44070d5ec/985c366c85194a0296a066141d450fad [2022-01-10 08:22:42,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:22:42,500 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 08:22:42,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:22:42,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:22:42,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:22:42,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d73971b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42, skipping insertion in model container [2022-01-10 08:22:42,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:22:42,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:22:42,697 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.01.cil-1.c[911,924] [2022-01-10 08:22:42,770 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.01.cil-1.c[8416,8429] [2022-01-10 08:22:42,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:22:42,815 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:22:42,823 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.01.cil-1.c[911,924] [2022-01-10 08:22:42,851 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.01.cil-1.c[8416,8429] [2022-01-10 08:22:42,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:22:42,884 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:22:42,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42 WrapperNode [2022-01-10 08:22:42,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:22:42,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:22:42,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:22:42,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:22:42,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,944 INFO L137 Inliner]: procedures = 58, calls = 64, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 422 [2022-01-10 08:22:42,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:22:42,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:22:42,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:22:42,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:22:42,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:22:42,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:22:42,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:22:42,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:22:42,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (1/1) ... [2022-01-10 08:22:42,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:22:43,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:22:43,053 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 08:22:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:22:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-01-10 08:22:43,084 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-01-10 08:22:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-01-10 08:22:43,084 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-01-10 08:22:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-01-10 08:22:43,084 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-01-10 08:22:43,084 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-01-10 08:22:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-01-10 08:22:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-01-10 08:22:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-01-10 08:22:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-01-10 08:22:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-01-10 08:22:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-01-10 08:22:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-01-10 08:22:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-01-10 08:22:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-01-10 08:22:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:22:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-01-10 08:22:43,085 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-01-10 08:22:43,085 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-01-10 08:22:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-01-10 08:22:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-01-10 08:22:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-01-10 08:22:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-01-10 08:22:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-01-10 08:22:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-01-10 08:22:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-01-10 08:22:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:22:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:22:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-01-10 08:22:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-01-10 08:22:43,075 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 08:22:43,189 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:22:43,190 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:22:43,504 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1bv32 == ~q_free~0); [2022-01-10 08:22:43,504 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 08:22:43,538 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:22:43,544 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:22:43,544 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-10 08:22:43,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:43 BoogieIcfgContainer [2022-01-10 08:22:43,546 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:22:43,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:22:43,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:22:43,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:22:43,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:22:42" (1/3) ... [2022-01-10 08:22:43,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1d1540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:22:43, skipping insertion in model container [2022-01-10 08:22:43,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:22:42" (2/3) ... [2022-01-10 08:22:43,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1d1540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:22:43, skipping insertion in model container [2022-01-10 08:22:43,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:22:43" (3/3) ... [2022-01-10 08:22:43,554 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.01.cil-1.c [2022-01-10 08:22:43,558 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:22:43,558 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-01-10 08:22:43,587 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:22:43,592 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 08:22:43,592 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-01-10 08:22:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 224 states, 176 states have (on average 1.5340909090909092) internal successors, (270), 182 states have internal predecessors, (270), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-10 08:22:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 08:22:43,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:43,627 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] [2022-01-10 08:22:43,628 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:43,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1818445817, now seen corresponding path program 1 times [2022-01-10 08:22:43,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:43,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868606536] [2022-01-10 08:22:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:43,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:43,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:43,647 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 08:22:43,671 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 08:22:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:43,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:43,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:43,962 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 08:22:43,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:43,962 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:43,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868606536] [2022-01-10 08:22:43,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868606536] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:43,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:43,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:43,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384052050] [2022-01-10 08:22:43,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:43,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:43,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:43,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:43,998 INFO L87 Difference]: Start difference. First operand has 224 states, 176 states have (on average 1.5340909090909092) internal successors, (270), 182 states have internal predecessors, (270), 31 states have call successors, (31), 14 states have call predecessors, (31), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:44,478 INFO L93 Difference]: Finished difference Result 528 states and 787 transitions. [2022-01-10 08:22:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 08:22:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:44,489 INFO L225 Difference]: With dead ends: 528 [2022-01-10 08:22:44,489 INFO L226 Difference]: Without dead ends: 311 [2022-01-10 08:22:44,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 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 08:22:44,497 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 422 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:44,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 729 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 08:22:44,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-10 08:22:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 304. [2022-01-10 08:22:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 241 states have (on average 1.4398340248962656) internal successors, (347), 246 states have internal predecessors, (347), 41 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-01-10 08:22:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 428 transitions. [2022-01-10 08:22:44,547 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 428 transitions. Word has length 57 [2022-01-10 08:22:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:44,548 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 428 transitions. [2022-01-10 08:22:44,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 428 transitions. [2022-01-10 08:22:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 08:22:44,551 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:44,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:44,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-01-10 08:22:44,764 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 08:22:44,765 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:44,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1564569483, now seen corresponding path program 1 times [2022-01-10 08:22:44,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:44,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836115687] [2022-01-10 08:22:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:44,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:44,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:44,769 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 08:22:44,777 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 08:22:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:44,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:44,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:45,004 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 08:22:45,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:45,005 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:45,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836115687] [2022-01-10 08:22:45,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836115687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:45,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:45,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:45,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605468827] [2022-01-10 08:22:45,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:45,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:45,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:45,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:45,007 INFO L87 Difference]: Start difference. First operand 304 states and 428 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:45,254 INFO L93 Difference]: Finished difference Result 487 states and 692 transitions. [2022-01-10 08:22:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:22:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 08:22:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:45,261 INFO L225 Difference]: With dead ends: 487 [2022-01-10 08:22:45,261 INFO L226 Difference]: Without dead ends: 304 [2022-01-10 08:22:45,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 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 08:22:45,265 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 361 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:45,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 546 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:22:45,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-10 08:22:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-01-10 08:22:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 241 states have (on average 1.4107883817427387) internal successors, (340), 246 states have internal predecessors, (340), 41 states have call successors, (41), 20 states have call predecessors, (41), 20 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-01-10 08:22:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 421 transitions. [2022-01-10 08:22:45,306 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 421 transitions. Word has length 57 [2022-01-10 08:22:45,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:45,307 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 421 transitions. [2022-01-10 08:22:45,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:45,307 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 421 transitions. [2022-01-10 08:22:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 08:22:45,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:45,315 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] [2022-01-10 08:22:45,323 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 08:22:45,525 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 08:22:45,525 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:45,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash -265963641, now seen corresponding path program 1 times [2022-01-10 08:22:45,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:45,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525858722] [2022-01-10 08:22:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:45,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:45,529 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 08:22:45,530 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 08:22:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:45,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:45,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:45,696 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 08:22:45,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:45,696 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:45,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525858722] [2022-01-10 08:22:45,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525858722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:45,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:45,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:45,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151833466] [2022-01-10 08:22:45,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:45,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:45,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:45,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:45,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:45,698 INFO L87 Difference]: Start difference. First operand 304 states and 421 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:45,973 INFO L93 Difference]: Finished difference Result 525 states and 734 transitions. [2022-01-10 08:22:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:45,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 08:22:45,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:45,975 INFO L225 Difference]: With dead ends: 525 [2022-01-10 08:22:45,975 INFO L226 Difference]: Without dead ends: 342 [2022-01-10 08:22:45,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 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 08:22:45,978 INFO L933 BasicCegarLoop]: 264 mSDtfsCounter, 371 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:45,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 538 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:22:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-10 08:22:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-01-10 08:22:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 273 states have (on average 1.3736263736263736) internal successors, (375), 278 states have internal predecessors, (375), 43 states have call successors, (43), 24 states have call predecessors, (43), 24 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-01-10 08:22:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 460 transitions. [2022-01-10 08:22:45,995 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 460 transitions. Word has length 57 [2022-01-10 08:22:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:45,996 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 460 transitions. [2022-01-10 08:22:45,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 460 transitions. [2022-01-10 08:22:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 08:22:45,997 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:45,997 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] [2022-01-10 08:22:46,005 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 08:22:46,205 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 08:22:46,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:46,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash -740655093, now seen corresponding path program 1 times [2022-01-10 08:22:46,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:46,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155922867] [2022-01-10 08:22:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:46,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:46,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:46,208 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 08:22:46,209 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 08:22:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:46,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:46,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:46,359 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 08:22:46,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:46,359 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:46,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155922867] [2022-01-10 08:22:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155922867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:46,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:46,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:46,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130187328] [2022-01-10 08:22:46,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:46,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:46,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:46,361 INFO L87 Difference]: Start difference. First operand 342 states and 460 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:46,399 INFO L93 Difference]: Finished difference Result 604 states and 815 transitions. [2022-01-10 08:22:46,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:46,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 08:22:46,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:46,401 INFO L225 Difference]: With dead ends: 604 [2022-01-10 08:22:46,401 INFO L226 Difference]: Without dead ends: 384 [2022-01-10 08:22:46,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 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 08:22:46,402 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 50 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1191 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 08:22:46,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1191 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-10 08:22:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 348. [2022-01-10 08:22:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 279 states have (on average 1.3584229390681004) internal successors, (379), 284 states have internal predecessors, (379), 43 states have call successors, (43), 24 states have call predecessors, (43), 24 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-01-10 08:22:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 464 transitions. [2022-01-10 08:22:46,418 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 464 transitions. Word has length 57 [2022-01-10 08:22:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:46,418 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 464 transitions. [2022-01-10 08:22:46,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 464 transitions. [2022-01-10 08:22:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 08:22:46,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:46,419 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] [2022-01-10 08:22:46,425 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 08:22:46,625 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 08:22:46,626 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash -813041651, now seen corresponding path program 1 times [2022-01-10 08:22:46,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:46,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526791689] [2022-01-10 08:22:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:46,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:46,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:46,627 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 08:22:46,628 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 08:22:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:46,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:46,782 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 08:22:46,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:46,782 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:46,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526791689] [2022-01-10 08:22:46,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526791689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:46,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:46,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:22:46,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909580859] [2022-01-10 08:22:46,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:46,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:46,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:46,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:46,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:46,784 INFO L87 Difference]: Start difference. First operand 348 states and 464 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:46,820 INFO L93 Difference]: Finished difference Result 743 states and 980 transitions. [2022-01-10 08:22:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:46,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 08:22:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:46,824 INFO L225 Difference]: With dead ends: 743 [2022-01-10 08:22:46,824 INFO L226 Difference]: Without dead ends: 517 [2022-01-10 08:22:46,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 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 08:22:46,825 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 256 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 449 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 08:22:46,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 449 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:46,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-01-10 08:22:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 511. [2022-01-10 08:22:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 410 states have (on average 1.3365853658536586) internal successors, (548), 416 states have internal predecessors, (548), 62 states have call successors, (62), 36 states have call predecessors, (62), 37 states have return successors, (62), 60 states have call predecessors, (62), 60 states have call successors, (62) [2022-01-10 08:22:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 672 transitions. [2022-01-10 08:22:46,852 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 672 transitions. Word has length 57 [2022-01-10 08:22:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:46,852 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 672 transitions. [2022-01-10 08:22:46,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 672 transitions. [2022-01-10 08:22:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 08:22:46,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:46,853 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] [2022-01-10 08:22:46,862 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 08:22:47,060 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 08:22:47,060 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:47,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:47,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1710454670, now seen corresponding path program 1 times [2022-01-10 08:22:47,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:47,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690664872] [2022-01-10 08:22:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:47,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:47,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:47,062 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 08:22:47,063 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 08:22:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:47,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:47,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:47,183 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 08:22:47,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:47,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:47,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690664872] [2022-01-10 08:22:47,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690664872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:47,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:47,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:47,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288298958] [2022-01-10 08:22:47,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:47,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:47,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:47,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:47,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:47,185 INFO L87 Difference]: Start difference. First operand 511 states and 672 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:47,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:47,231 INFO L93 Difference]: Finished difference Result 928 states and 1228 transitions. [2022-01-10 08:22:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 08:22:47,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:47,234 INFO L225 Difference]: With dead ends: 928 [2022-01-10 08:22:47,234 INFO L226 Difference]: Without dead ends: 539 [2022-01-10 08:22:47,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 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 08:22:47,235 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 10 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1195 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 08:22:47,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1195 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-10 08:22:47,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 523. [2022-01-10 08:22:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 422 states have (on average 1.3222748815165877) internal successors, (558), 428 states have internal predecessors, (558), 62 states have call successors, (62), 36 states have call predecessors, (62), 37 states have return successors, (62), 60 states have call predecessors, (62), 60 states have call successors, (62) [2022-01-10 08:22:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 682 transitions. [2022-01-10 08:22:47,259 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 682 transitions. Word has length 57 [2022-01-10 08:22:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:47,259 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 682 transitions. [2022-01-10 08:22:47,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 682 transitions. [2022-01-10 08:22:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 08:22:47,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:47,260 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] [2022-01-10 08:22:47,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:47,467 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 08:22:47,467 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash -661284592, now seen corresponding path program 1 times [2022-01-10 08:22:47,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:47,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532014031] [2022-01-10 08:22:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:47,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:47,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:47,469 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 08:22:47,471 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 08:22:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:47,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:22:47,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:47,626 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 08:22:47,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:47,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:47,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532014031] [2022-01-10 08:22:47,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532014031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:47,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:47,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:47,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729207248] [2022-01-10 08:22:47,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:47,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:47,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:47,628 INFO L87 Difference]: Start difference. First operand 523 states and 682 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:47,887 INFO L93 Difference]: Finished difference Result 989 states and 1278 transitions. [2022-01-10 08:22:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2022-01-10 08:22:47,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:47,891 INFO L225 Difference]: With dead ends: 989 [2022-01-10 08:22:47,891 INFO L226 Difference]: Without dead ends: 587 [2022-01-10 08:22:47,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 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 08:22:47,911 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 346 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:47,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 539 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:22:47,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-01-10 08:22:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 579. [2022-01-10 08:22:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 474 states have (on average 1.261603375527426) internal successors, (598), 480 states have internal predecessors, (598), 62 states have call successors, (62), 40 states have call predecessors, (62), 41 states have return successors, (62), 60 states have call predecessors, (62), 60 states have call successors, (62) [2022-01-10 08:22:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 722 transitions. [2022-01-10 08:22:47,932 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 722 transitions. Word has length 57 [2022-01-10 08:22:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:47,932 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 722 transitions. [2022-01-10 08:22:47,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-10 08:22:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 722 transitions. [2022-01-10 08:22:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-10 08:22:47,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:47,933 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] [2022-01-10 08:22:47,939 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 08:22:48,139 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 08:22:48,140 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:48,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1478933042, now seen corresponding path program 1 times [2022-01-10 08:22:48,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:48,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329074173] [2022-01-10 08:22:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:48,141 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:48,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:48,142 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 08:22:48,143 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 08:22:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:48,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:48,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:48,291 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 08:22:48,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:48,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:48,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329074173] [2022-01-10 08:22:48,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329074173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:48,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:48,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:22:48,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485319192] [2022-01-10 08:22:48,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:48,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:48,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:48,292 INFO L87 Difference]: Start difference. First operand 579 states and 722 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:22:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:48,322 INFO L93 Difference]: Finished difference Result 1462 states and 1796 transitions. [2022-01-10 08:22:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:48,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2022-01-10 08:22:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:48,325 INFO L225 Difference]: With dead ends: 1462 [2022-01-10 08:22:48,325 INFO L226 Difference]: Without dead ends: 1005 [2022-01-10 08:22:48,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 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 08:22:48,327 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 228 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 413 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 08:22:48,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 413 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-01-10 08:22:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1001. [2022-01-10 08:22:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 820 states have (on average 1.2195121951219512) internal successors, (1000), 832 states have internal predecessors, (1000), 104 states have call successors, (104), 72 states have call predecessors, (104), 75 states have return successors, (106), 98 states have call predecessors, (106), 102 states have call successors, (106) [2022-01-10 08:22:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1210 transitions. [2022-01-10 08:22:48,357 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1210 transitions. Word has length 57 [2022-01-10 08:22:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:48,358 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 1210 transitions. [2022-01-10 08:22:48,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 2 states have internal predecessors, (47), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-01-10 08:22:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1210 transitions. [2022-01-10 08:22:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:22:48,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:48,359 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 08:22:48,367 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 08:22:48,567 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 08:22:48,568 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:48,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1901012817, now seen corresponding path program 1 times [2022-01-10 08:22:48,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:48,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717938621] [2022-01-10 08:22:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:48,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:48,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:48,570 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 08:22:48,571 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 08:22:48,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:48,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-10 08:22:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:48,711 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 08:22:48,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:48,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:48,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717938621] [2022-01-10 08:22:48,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717938621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:48,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:48,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:48,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886239695] [2022-01-10 08:22:48,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:48,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:48,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:48,713 INFO L87 Difference]: Start difference. First operand 1001 states and 1210 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 08:22:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:49,027 INFO L93 Difference]: Finished difference Result 1224 states and 1532 transitions. [2022-01-10 08:22:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:49,027 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 08:22:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:49,031 INFO L225 Difference]: With dead ends: 1224 [2022-01-10 08:22:49,031 INFO L226 Difference]: Without dead ends: 1120 [2022-01-10 08:22:49,032 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 08:22:49,032 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 286 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:49,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 837 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:22:49,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-10 08:22:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1113. [2022-01-10 08:22:49,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 910 states have (on average 1.2384615384615385) internal successors, (1127), 924 states have internal predecessors, (1127), 117 states have call successors, (117), 79 states have call predecessors, (117), 84 states have return successors, (124), 112 states have call predecessors, (124), 115 states have call successors, (124) [2022-01-10 08:22:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 1368 transitions. [2022-01-10 08:22:49,072 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 1368 transitions. Word has length 65 [2022-01-10 08:22:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:49,072 INFO L470 AbstractCegarLoop]: Abstraction has 1113 states and 1368 transitions. [2022-01-10 08:22:49,072 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 08:22:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 1368 transitions. [2022-01-10 08:22:49,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:22:49,073 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:49,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:22:49,082 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 08:22:49,280 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 08:22:49,281 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:49,281 INFO L85 PathProgramCache]: Analyzing trace with hash -855614449, now seen corresponding path program 1 times [2022-01-10 08:22:49,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:49,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315798033] [2022-01-10 08:22:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:49,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:49,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:49,283 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 08:22:49,303 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 08:22:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:49,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:22:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:49,451 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 08:22:49,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:49,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:49,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315798033] [2022-01-10 08:22:49,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315798033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:49,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:49,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-10 08:22:49,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203307710] [2022-01-10 08:22:49,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:49,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:22:49,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:22:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:22:49,453 INFO L87 Difference]: Start difference. First operand 1113 states and 1368 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 08:22:49,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:49,741 INFO L93 Difference]: Finished difference Result 1569 states and 2028 transitions. [2022-01-10 08:22:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:49,741 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 08:22:49,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:49,746 INFO L225 Difference]: With dead ends: 1569 [2022-01-10 08:22:49,747 INFO L226 Difference]: Without dead ends: 1358 [2022-01-10 08:22:49,748 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 08:22:49,748 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 278 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:49,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 776 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:22:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-01-10 08:22:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1350. [2022-01-10 08:22:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1099 states have (on average 1.262056414922657) internal successors, (1387), 1121 states have internal predecessors, (1387), 143 states have call successors, (143), 93 states have call predecessors, (143), 106 states have return successors, (170), 140 states have call predecessors, (170), 141 states have call successors, (170) [2022-01-10 08:22:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 1700 transitions. [2022-01-10 08:22:49,793 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 1700 transitions. Word has length 65 [2022-01-10 08:22:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:49,794 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 1700 transitions. [2022-01-10 08:22:49,794 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 08:22:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 1700 transitions. [2022-01-10 08:22:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-10 08:22:49,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:49,796 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 08:22:49,809 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 08:22:50,003 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 08:22:50,003 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:50,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1276753231, now seen corresponding path program 1 times [2022-01-10 08:22:50,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:50,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086978708] [2022-01-10 08:22:50,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:50,004 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:50,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:50,008 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 08:22:50,010 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 08:22:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:50,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:50,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:50,133 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 08:22:50,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:50,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:50,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086978708] [2022-01-10 08:22:50,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086978708] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:50,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:50,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:22:50,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552972133] [2022-01-10 08:22:50,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:50,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:50,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:50,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:50,135 INFO L87 Difference]: Start difference. First operand 1350 states and 1700 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 08:22:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:50,189 INFO L93 Difference]: Finished difference Result 2186 states and 2857 transitions. [2022-01-10 08:22:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:50,189 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 08:22:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:50,195 INFO L225 Difference]: With dead ends: 2186 [2022-01-10 08:22:50,195 INFO L226 Difference]: Without dead ends: 1752 [2022-01-10 08:22:50,197 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 08:22:50,197 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 257 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 453 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 08:22:50,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 453 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2022-01-10 08:22:50,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1740. [2022-01-10 08:22:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1411 states have (on average 1.2813607370659108) internal successors, (1808), 1443 states have internal predecessors, (1808), 183 states have call successors, (183), 121 states have call predecessors, (183), 144 states have return successors, (227), 180 states have call predecessors, (227), 181 states have call successors, (227) [2022-01-10 08:22:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2218 transitions. [2022-01-10 08:22:50,289 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2218 transitions. Word has length 65 [2022-01-10 08:22:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:50,290 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 2218 transitions. [2022-01-10 08:22:50,290 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 08:22:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2218 transitions. [2022-01-10 08:22:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:22:50,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:50,291 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 08:22:50,303 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 08:22:50,498 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 08:22:50,498 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:50,498 INFO L85 PathProgramCache]: Analyzing trace with hash 545018568, now seen corresponding path program 1 times [2022-01-10 08:22:50,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537597451] [2022-01-10 08:22:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:50,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:50,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:50,500 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 08:22:50,501 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 08:22:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:22:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:50,642 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 08:22:50,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:50,643 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:50,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537597451] [2022-01-10 08:22:50,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537597451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:50,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:50,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:22:50,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057555115] [2022-01-10 08:22:50,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:50,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:22:50,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:50,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:22:50,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:50,644 INFO L87 Difference]: Start difference. First operand 1740 states and 2218 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 08:22:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:50,721 INFO L93 Difference]: Finished difference Result 2604 states and 3412 transitions. [2022-01-10 08:22:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:50,722 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 08:22:50,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:50,728 INFO L225 Difference]: With dead ends: 2604 [2022-01-10 08:22:50,728 INFO L226 Difference]: Without dead ends: 1780 [2022-01-10 08:22:50,730 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 08:22:50,730 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 7 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1453 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 08:22:50,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1453 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2022-01-10 08:22:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1760. [2022-01-10 08:22:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1427 states have (on average 1.2754029432375613) internal successors, (1820), 1459 states have internal predecessors, (1820), 183 states have call successors, (183), 121 states have call predecessors, (183), 148 states have return successors, (231), 184 states have call predecessors, (231), 181 states have call successors, (231) [2022-01-10 08:22:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 2234 transitions. [2022-01-10 08:22:50,787 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 2234 transitions. Word has length 66 [2022-01-10 08:22:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:50,787 INFO L470 AbstractCegarLoop]: Abstraction has 1760 states and 2234 transitions. [2022-01-10 08:22:50,788 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 08:22:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 2234 transitions. [2022-01-10 08:22:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-10 08:22:50,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:50,790 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 08:22:50,807 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 08:22:50,996 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 08:22:50,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:50,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:50,997 INFO L85 PathProgramCache]: Analyzing trace with hash -484340730, now seen corresponding path program 1 times [2022-01-10 08:22:50,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:50,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731541626] [2022-01-10 08:22:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:50,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:50,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:50,998 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 08:22:51,031 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 08:22:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:51,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:51,148 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 08:22:51,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:51,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:51,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731541626] [2022-01-10 08:22:51,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731541626] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:51,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:51,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:22:51,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060945602] [2022-01-10 08:22:51,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:51,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:51,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:51,150 INFO L87 Difference]: Start difference. First operand 1760 states and 2234 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 08:22:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:51,222 INFO L93 Difference]: Finished difference Result 3376 states and 4414 transitions. [2022-01-10 08:22:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:51,223 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 08:22:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:51,231 INFO L225 Difference]: With dead ends: 3376 [2022-01-10 08:22:51,231 INFO L226 Difference]: Without dead ends: 2532 [2022-01-10 08:22:51,234 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 08:22:51,234 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 243 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 432 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 08:22:51,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 432 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-01-10 08:22:51,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2516. [2022-01-10 08:22:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2516 states, 2023 states have (on average 1.2852199703410776) internal successors, (2600), 2075 states have internal predecessors, (2600), 263 states have call successors, (263), 177 states have call predecessors, (263), 228 states have return successors, (349), 268 states have call predecessors, (349), 261 states have call successors, (349) [2022-01-10 08:22:51,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2516 states to 2516 states and 3212 transitions. [2022-01-10 08:22:51,335 INFO L78 Accepts]: Start accepts. Automaton has 2516 states and 3212 transitions. Word has length 66 [2022-01-10 08:22:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:51,336 INFO L470 AbstractCegarLoop]: Abstraction has 2516 states and 3212 transitions. [2022-01-10 08:22:51,336 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 08:22:51,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2516 states and 3212 transitions. [2022-01-10 08:22:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:22:51,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:51,339 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 08:22:51,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-01-10 08:22:51,546 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 08:22:51,546 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:51,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1518736977, now seen corresponding path program 1 times [2022-01-10 08:22:51,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:51,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793495050] [2022-01-10 08:22:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:51,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:51,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:51,548 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 08:22:51,549 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 08:22:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:51,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:22:51,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:51,680 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 08:22:51,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:51,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:51,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793495050] [2022-01-10 08:22:51,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793495050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:51,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:51,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:22:51,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975084241] [2022-01-10 08:22:51,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:51,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:22:51,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:51,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:22:51,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:51,682 INFO L87 Difference]: Start difference. First operand 2516 states and 3212 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 08:22:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:51,747 INFO L93 Difference]: Finished difference Result 4172 states and 5432 transitions. [2022-01-10 08:22:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:22:51,747 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 08:22:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:51,756 INFO L225 Difference]: With dead ends: 4172 [2022-01-10 08:22:51,756 INFO L226 Difference]: Without dead ends: 2572 [2022-01-10 08:22:51,760 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 08:22:51,760 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 4 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1444 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 08:22:51,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1444 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-01-10 08:22:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2556. [2022-01-10 08:22:51,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2556 states, 2055 states have (on average 1.2768856447688564) internal successors, (2624), 2107 states have internal predecessors, (2624), 263 states have call successors, (263), 177 states have call predecessors, (263), 236 states have return successors, (357), 276 states have call predecessors, (357), 261 states have call successors, (357) [2022-01-10 08:22:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2556 states to 2556 states and 3244 transitions. [2022-01-10 08:22:51,866 INFO L78 Accepts]: Start accepts. Automaton has 2556 states and 3244 transitions. Word has length 83 [2022-01-10 08:22:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:51,866 INFO L470 AbstractCegarLoop]: Abstraction has 2556 states and 3244 transitions. [2022-01-10 08:22:51,866 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 08:22:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2556 states and 3244 transitions. [2022-01-10 08:22:51,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-10 08:22:51,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:51,868 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 08:22:51,878 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 08:22:52,074 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 08:22:52,075 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:52,075 INFO L85 PathProgramCache]: Analyzing trace with hash -625250639, now seen corresponding path program 1 times [2022-01-10 08:22:52,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:52,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199095305] [2022-01-10 08:22:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:52,075 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:52,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:52,076 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 08:22:52,078 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 08:22:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:52,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:52,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:52,236 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 08:22:52,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:52,236 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:52,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199095305] [2022-01-10 08:22:52,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199095305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:52,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:52,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:52,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796951009] [2022-01-10 08:22:52,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:52,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:22:52,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:52,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:22:52,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:22:52,237 INFO L87 Difference]: Start difference. First operand 2556 states and 3244 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 08:22:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:52,474 INFO L93 Difference]: Finished difference Result 5792 states and 7547 transitions. [2022-01-10 08:22:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:52,474 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 08:22:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:52,489 INFO L225 Difference]: With dead ends: 5792 [2022-01-10 08:22:52,489 INFO L226 Difference]: Without dead ends: 4156 [2022-01-10 08:22:52,494 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 08:22:52,495 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 370 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:52,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 482 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:22:52,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2022-01-10 08:22:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 4152. [2022-01-10 08:22:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4152 states, 3295 states have (on average 1.2734446130500758) internal successors, (4196), 3395 states have internal predecessors, (4196), 443 states have call successors, (443), 289 states have call predecessors, (443), 412 states have return successors, (694), 476 states have call predecessors, (694), 441 states have call successors, (694) [2022-01-10 08:22:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 5333 transitions. [2022-01-10 08:22:52,671 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 5333 transitions. Word has length 83 [2022-01-10 08:22:52,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:52,672 INFO L470 AbstractCegarLoop]: Abstraction has 4152 states and 5333 transitions. [2022-01-10 08:22:52,672 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 08:22:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 5333 transitions. [2022-01-10 08:22:52,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-10 08:22:52,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:52,676 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 08:22:52,695 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 08:22:52,883 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 08:22:52,883 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:52,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:52,883 INFO L85 PathProgramCache]: Analyzing trace with hash -550923707, now seen corresponding path program 1 times [2022-01-10 08:22:52,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:52,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693126976] [2022-01-10 08:22:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:52,884 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:52,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:52,885 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 08:22:52,886 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 08:22:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:52,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:53,019 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 08:22:53,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:53,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:53,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693126976] [2022-01-10 08:22:53,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693126976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:53,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:53,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:22:53,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763969555] [2022-01-10 08:22:53,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:53,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:53,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:53,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:53,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:53,021 INFO L87 Difference]: Start difference. First operand 4152 states and 5333 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 08:22:53,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:53,214 INFO L93 Difference]: Finished difference Result 10412 states and 13554 transitions. [2022-01-10 08:22:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:53,214 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 08:22:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:53,239 INFO L225 Difference]: With dead ends: 10412 [2022-01-10 08:22:53,239 INFO L226 Difference]: Without dead ends: 5720 [2022-01-10 08:22:53,250 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 08:22:53,250 INFO L933 BasicCegarLoop]: 410 mSDtfsCounter, 116 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 694 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 08:22:53,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 694 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2022-01-10 08:22:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 5720. [2022-01-10 08:22:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5720 states, 4519 states have (on average 1.2728479752157558) internal successors, (5752), 4659 states have internal predecessors, (5752), 607 states have call successors, (607), 401 states have call predecessors, (607), 592 states have return successors, (1026), 668 states have call predecessors, (1026), 605 states have call successors, (1026) [2022-01-10 08:22:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5720 states to 5720 states and 7385 transitions. [2022-01-10 08:22:53,458 INFO L78 Accepts]: Start accepts. Automaton has 5720 states and 7385 transitions. Word has length 85 [2022-01-10 08:22:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:53,459 INFO L470 AbstractCegarLoop]: Abstraction has 5720 states and 7385 transitions. [2022-01-10 08:22:53,459 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 08:22:53,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5720 states and 7385 transitions. [2022-01-10 08:22:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 08:22:53,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:53,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:22:53,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-01-10 08:22:53,671 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 08:22:53,672 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:53,672 INFO L85 PathProgramCache]: Analyzing trace with hash -837976402, now seen corresponding path program 1 times [2022-01-10 08:22:53,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461210955] [2022-01-10 08:22:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:53,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:53,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:53,673 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 08:22:53,675 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 08:22:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:53,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:22:53,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 08:22:53,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:53,856 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:53,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461210955] [2022-01-10 08:22:53,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461210955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:53,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:53,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:53,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192599492] [2022-01-10 08:22:53,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:53,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:22:53,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:53,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:22:53,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:22:53,858 INFO L87 Difference]: Start difference. First operand 5720 states and 7385 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:22:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:54,170 INFO L93 Difference]: Finished difference Result 7372 states and 9376 transitions. [2022-01-10 08:22:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 92 [2022-01-10 08:22:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:54,193 INFO L225 Difference]: With dead ends: 7372 [2022-01-10 08:22:54,193 INFO L226 Difference]: Without dead ends: 6494 [2022-01-10 08:22:54,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 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 08:22:54,198 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 320 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:54,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 550 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:22:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6494 states. [2022-01-10 08:22:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6494 to 6492. [2022-01-10 08:22:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6492 states, 5144 states have (on average 1.2583592534992223) internal successors, (6473), 5297 states have internal predecessors, (6473), 686 states have call successors, (686), 457 states have call predecessors, (686), 660 states have return successors, (1141), 747 states have call predecessors, (1141), 684 states have call successors, (1141) [2022-01-10 08:22:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6492 states to 6492 states and 8300 transitions. [2022-01-10 08:22:54,439 INFO L78 Accepts]: Start accepts. Automaton has 6492 states and 8300 transitions. Word has length 92 [2022-01-10 08:22:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:54,439 INFO L470 AbstractCegarLoop]: Abstraction has 6492 states and 8300 transitions. [2022-01-10 08:22:54,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-01-10 08:22:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6492 states and 8300 transitions. [2022-01-10 08:22:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-10 08:22:54,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:54,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:22:54,450 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 08:22:54,650 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 08:22:54,651 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:54,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:54,651 INFO L85 PathProgramCache]: Analyzing trace with hash 486879792, now seen corresponding path program 1 times [2022-01-10 08:22:54,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:54,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140209017] [2022-01-10 08:22:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:54,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:54,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:54,653 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 08:22:54,654 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 08:22:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:54,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:54,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-01-10 08:22:54,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:54,788 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:54,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140209017] [2022-01-10 08:22:54,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140209017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:54,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:54,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:22:54,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862868666] [2022-01-10 08:22:54,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:54,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:54,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:54,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:54,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:54,789 INFO L87 Difference]: Start difference. First operand 6492 states and 8300 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:54,946 INFO L93 Difference]: Finished difference Result 7772 states and 9807 transitions. [2022-01-10 08:22:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 92 [2022-01-10 08:22:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:54,960 INFO L225 Difference]: With dead ends: 7772 [2022-01-10 08:22:54,960 INFO L226 Difference]: Without dead ends: 6122 [2022-01-10 08:22:54,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 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 08:22:54,963 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 126 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 447 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 08:22:54,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 447 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:54,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6122 states. [2022-01-10 08:22:55,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6122 to 6122. [2022-01-10 08:22:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6122 states, 4845 states have (on average 1.2641898864809082) internal successors, (6125), 4993 states have internal predecessors, (6125), 645 states have call successors, (645), 429 states have call predecessors, (645), 630 states have return successors, (1086), 708 states have call predecessors, (1086), 643 states have call successors, (1086) [2022-01-10 08:22:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6122 states to 6122 states and 7856 transitions. [2022-01-10 08:22:55,142 INFO L78 Accepts]: Start accepts. Automaton has 6122 states and 7856 transitions. Word has length 92 [2022-01-10 08:22:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:55,142 INFO L470 AbstractCegarLoop]: Abstraction has 6122 states and 7856 transitions. [2022-01-10 08:22:55,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-01-10 08:22:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 6122 states and 7856 transitions. [2022-01-10 08:22:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-10 08:22:55,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:55,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:22:55,156 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 08:22:55,354 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 08:22:55,354 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:55,354 INFO L85 PathProgramCache]: Analyzing trace with hash -249307800, now seen corresponding path program 1 times [2022-01-10 08:22:55,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:55,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1194275111] [2022-01-10 08:22:55,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:55,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:55,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:55,356 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 08:22:55,357 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 08:22:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:55,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:55,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-10 08:22:55,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:55,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:55,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1194275111] [2022-01-10 08:22:55,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1194275111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:55,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:55,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:22:55,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724298574] [2022-01-10 08:22:55,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:55,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:55,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:55,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:55,494 INFO L87 Difference]: Start difference. First operand 6122 states and 7856 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:22:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:55,682 INFO L93 Difference]: Finished difference Result 8154 states and 10294 transitions. [2022-01-10 08:22:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2022-01-10 08:22:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:55,707 INFO L225 Difference]: With dead ends: 8154 [2022-01-10 08:22:55,707 INFO L226 Difference]: Without dead ends: 6408 [2022-01-10 08:22:55,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 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 08:22:55,713 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 96 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 672 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 08:22:55,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 672 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:55,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2022-01-10 08:22:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 6408. [2022-01-10 08:22:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6408 states, 5079 states have (on average 1.2577278991927545) internal successors, (6388), 5227 states have internal predecessors, (6388), 675 states have call successors, (675), 449 states have call predecessors, (675), 652 states have return successors, (1128), 740 states have call predecessors, (1128), 673 states have call successors, (1128) [2022-01-10 08:22:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6408 states to 6408 states and 8191 transitions. [2022-01-10 08:22:55,922 INFO L78 Accepts]: Start accepts. Automaton has 6408 states and 8191 transitions. Word has length 93 [2022-01-10 08:22:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:55,923 INFO L470 AbstractCegarLoop]: Abstraction has 6408 states and 8191 transitions. [2022-01-10 08:22:55,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-10 08:22:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 6408 states and 8191 transitions. [2022-01-10 08:22:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-10 08:22:55,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:55,932 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:22:55,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-01-10 08:22:56,139 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 08:22:56,139 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:56,139 INFO L85 PathProgramCache]: Analyzing trace with hash -875820460, now seen corresponding path program 1 times [2022-01-10 08:22:56,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:56,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135935178] [2022-01-10 08:22:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:56,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:56,141 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 08:22:56,145 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 08:22:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:56,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:22:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-01-10 08:22:56,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:56,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:56,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135935178] [2022-01-10 08:22:56,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135935178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:56,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:56,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:22:56,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594995731] [2022-01-10 08:22:56,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:56,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:22:56,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:56,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:22:56,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:22:56,371 INFO L87 Difference]: Start difference. First operand 6408 states and 8191 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 08:22:56,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:56,641 INFO L93 Difference]: Finished difference Result 7986 states and 10070 transitions. [2022-01-10 08:22:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:22:56,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 134 [2022-01-10 08:22:56,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:56,659 INFO L225 Difference]: With dead ends: 7986 [2022-01-10 08:22:56,660 INFO L226 Difference]: Without dead ends: 6420 [2022-01-10 08:22:56,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 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 08:22:56,667 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 327 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:56,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 491 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:22:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2022-01-10 08:22:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 6420. [2022-01-10 08:22:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6420 states, 5087 states have (on average 1.2529978376253195) internal successors, (6374), 5237 states have internal predecessors, (6374), 675 states have call successors, (675), 449 states have call predecessors, (675), 656 states have return successors, (1116), 742 states have call predecessors, (1116), 673 states have call successors, (1116) [2022-01-10 08:22:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 8165 transitions. [2022-01-10 08:22:56,895 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 8165 transitions. Word has length 134 [2022-01-10 08:22:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:56,895 INFO L470 AbstractCegarLoop]: Abstraction has 6420 states and 8165 transitions. [2022-01-10 08:22:56,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 08:22:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 8165 transitions. [2022-01-10 08:22:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-10 08:22:56,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:56,907 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:22:56,916 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 08:22:57,114 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 08:22:57,114 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:57,115 INFO L85 PathProgramCache]: Analyzing trace with hash -952760958, now seen corresponding path program 1 times [2022-01-10 08:22:57,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:57,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253165438] [2022-01-10 08:22:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:57,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:57,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:57,117 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 08:22:57,119 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 08:22:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:22:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-01-10 08:22:57,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:57,322 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:57,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253165438] [2022-01-10 08:22:57,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253165438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:57,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:57,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:22:57,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009321187] [2022-01-10 08:22:57,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:57,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:22:57,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:57,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:22:57,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:22:57,323 INFO L87 Difference]: Start difference. First operand 6420 states and 8165 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 08:22:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:57,488 INFO L93 Difference]: Finished difference Result 7684 states and 9682 transitions. [2022-01-10 08:22:57,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:22:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 135 [2022-01-10 08:22:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:57,501 INFO L225 Difference]: With dead ends: 7684 [2022-01-10 08:22:57,501 INFO L226 Difference]: Without dead ends: 6428 [2022-01-10 08:22:57,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 08:22:57,504 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 89 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:57,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 615 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6428 states. [2022-01-10 08:22:57,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6428 to 6420. [2022-01-10 08:22:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6420 states, 5087 states have (on average 1.2451346569687438) internal successors, (6334), 5237 states have internal predecessors, (6334), 675 states have call successors, (675), 449 states have call predecessors, (675), 656 states have return successors, (1116), 742 states have call predecessors, (1116), 673 states have call successors, (1116) [2022-01-10 08:22:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 8125 transitions. [2022-01-10 08:22:57,690 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 8125 transitions. Word has length 135 [2022-01-10 08:22:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:57,691 INFO L470 AbstractCegarLoop]: Abstraction has 6420 states and 8125 transitions. [2022-01-10 08:22:57,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-01-10 08:22:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 8125 transitions. [2022-01-10 08:22:57,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-10 08:22:57,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:57,701 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:22:57,710 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 08:22:57,908 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 08:22:57,909 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1471946848, now seen corresponding path program 1 times [2022-01-10 08:22:57,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:57,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438024866] [2022-01-10 08:22:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:57,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:57,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:57,911 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 08:22:57,912 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 08:22:57,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:57,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 08:22:57,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-10 08:22:58,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:22:58,396 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-01-10 08:22:58,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:58,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438024866] [2022-01-10 08:22:58,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438024866] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-10 08:22:58,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-10 08:22:58,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-01-10 08:22:58,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388179113] [2022-01-10 08:22:58,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:58,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:22:58,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:58,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:22:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:22:58,398 INFO L87 Difference]: Start difference. First operand 6420 states and 8125 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 08:22:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:58,831 INFO L93 Difference]: Finished difference Result 8010 states and 9932 transitions. [2022-01-10 08:22:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 08:22:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 136 [2022-01-10 08:22:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:58,851 INFO L225 Difference]: With dead ends: 8010 [2022-01-10 08:22:58,851 INFO L226 Difference]: Without dead ends: 8008 [2022-01-10 08:22:58,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:22:58,859 INFO L933 BasicCegarLoop]: 394 mSDtfsCounter, 360 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 08:22:58,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 724 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 08:22:58,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2022-01-10 08:22:59,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7072. [2022-01-10 08:22:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7072 states, 5623 states have (on average 1.2345722923706206) internal successors, (6942), 5779 states have internal predecessors, (6942), 739 states have call successors, (739), 493 states have call predecessors, (739), 708 states have return successors, (1194), 808 states have call predecessors, (1194), 737 states have call successors, (1194) [2022-01-10 08:22:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7072 states to 7072 states and 8875 transitions. [2022-01-10 08:22:59,130 INFO L78 Accepts]: Start accepts. Automaton has 7072 states and 8875 transitions. Word has length 136 [2022-01-10 08:22:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:22:59,131 INFO L470 AbstractCegarLoop]: Abstraction has 7072 states and 8875 transitions. [2022-01-10 08:22:59,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-01-10 08:22:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7072 states and 8875 transitions. [2022-01-10 08:22:59,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-10 08:22:59,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:22:59,143 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 08:22:59,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-01-10 08:22:59,349 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 08:22:59,349 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:22:59,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:22:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash 373967783, now seen corresponding path program 1 times [2022-01-10 08:22:59,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:22:59,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698610732] [2022-01-10 08:22:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:22:59,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:22:59,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:22:59,351 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 08:22:59,353 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 08:22:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:22:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 08:22:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:22:59,594 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 08:22:59,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:22:59,594 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:22:59,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698610732] [2022-01-10 08:22:59,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698610732] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:22:59,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:22:59,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 08:22:59,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135523441] [2022-01-10 08:22:59,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:22:59,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 08:22:59,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:22:59,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 08:22:59,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-10 08:22:59,595 INFO L87 Difference]: Start difference. First operand 7072 states and 8875 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 08:22:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:22:59,803 INFO L93 Difference]: Finished difference Result 11918 states and 15319 transitions. [2022-01-10 08:22:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:22:59,804 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 08:22:59,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:22:59,824 INFO L225 Difference]: With dead ends: 11918 [2022-01-10 08:22:59,824 INFO L226 Difference]: Without dead ends: 7138 [2022-01-10 08:22:59,834 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 08:22:59,834 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 37 mSDsluCounter, 1147 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1436 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 08:22:59,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 1436 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:22:59,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7138 states. [2022-01-10 08:23:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7138 to 6592. [2022-01-10 08:23:00,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6592 states, 5311 states have (on average 1.2231218226322726) internal successors, (6496), 5406 states have internal predecessors, (6496), 643 states have call successors, (643), 442 states have call predecessors, (643), 636 states have return successors, (1051), 752 states have call predecessors, (1051), 641 states have call successors, (1051) [2022-01-10 08:23:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6592 states to 6592 states and 8190 transitions. [2022-01-10 08:23:00,101 INFO L78 Accepts]: Start accepts. Automaton has 6592 states and 8190 transitions. Word has length 155 [2022-01-10 08:23:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:00,101 INFO L470 AbstractCegarLoop]: Abstraction has 6592 states and 8190 transitions. [2022-01-10 08:23:00,101 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 08:23:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 6592 states and 8190 transitions. [2022-01-10 08:23:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-10 08:23:00,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:00,112 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 08:23:00,121 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 08:23:00,319 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 08:23:00,319 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:00,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1786838451, now seen corresponding path program 1 times [2022-01-10 08:23:00,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:00,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490773077] [2022-01-10 08:23:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:00,320 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:00,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:00,322 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 08:23:00,339 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 08:23:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:00,599 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 08:23:00,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:00,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:00,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490773077] [2022-01-10 08:23:00,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490773077] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:00,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:00,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:00,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670690185] [2022-01-10 08:23:00,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:00,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:00,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:00,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:00,601 INFO L87 Difference]: Start difference. First operand 6592 states and 8190 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 08:23:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:00,745 INFO L93 Difference]: Finished difference Result 9154 states and 11508 transitions. [2022-01-10 08:23:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:00,746 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 08:23:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:00,759 INFO L225 Difference]: With dead ends: 9154 [2022-01-10 08:23:00,759 INFO L226 Difference]: Without dead ends: 4898 [2022-01-10 08:23:00,768 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 08:23:00,769 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 148 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 419 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 08:23:00,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 419 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2022-01-10 08:23:00,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 4898. [2022-01-10 08:23:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4898 states, 3959 states have (on average 1.2061126547107857) internal successors, (4775), 4028 states have internal predecessors, (4775), 467 states have call successors, (467), 330 states have call predecessors, (467), 470 states have return successors, (731), 540 states have call predecessors, (731), 465 states have call successors, (731) [2022-01-10 08:23:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4898 states to 4898 states and 5973 transitions. [2022-01-10 08:23:00,985 INFO L78 Accepts]: Start accepts. Automaton has 4898 states and 5973 transitions. Word has length 156 [2022-01-10 08:23:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:00,986 INFO L470 AbstractCegarLoop]: Abstraction has 4898 states and 5973 transitions. [2022-01-10 08:23:00,986 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 08:23:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4898 states and 5973 transitions. [2022-01-10 08:23:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-10 08:23:00,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:00,994 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 08:23:01,003 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 08:23:01,201 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 08:23:01,201 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:01,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:01,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1532169874, now seen corresponding path program 1 times [2022-01-10 08:23:01,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:01,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490127875] [2022-01-10 08:23:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:01,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:01,212 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 08:23:01,247 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 08:23:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:01,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:01,548 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 08:23:01,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:01,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:01,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490127875] [2022-01-10 08:23:01,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490127875] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:01,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:01,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:01,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735689115] [2022-01-10 08:23:01,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:01,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:01,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:01,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:01,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:01,550 INFO L87 Difference]: Start difference. First operand 4898 states and 5973 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 08:23:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:01,789 INFO L93 Difference]: Finished difference Result 9020 states and 11456 transitions. [2022-01-10 08:23:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:01,790 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 08:23:01,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:01,814 INFO L225 Difference]: With dead ends: 9020 [2022-01-10 08:23:01,814 INFO L226 Difference]: Without dead ends: 6682 [2022-01-10 08:23:01,823 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 08:23:01,824 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 68 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 584 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 08:23:01,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 584 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2022-01-10 08:23:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6654. [2022-01-10 08:23:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6654 states, 5377 states have (on average 1.2281941603124418) internal successors, (6604), 5482 states have internal predecessors, (6604), 623 states have call successors, (623), 438 states have call predecessors, (623), 652 states have return successors, (1040), 734 states have call predecessors, (1040), 621 states have call successors, (1040) [2022-01-10 08:23:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6654 states to 6654 states and 8267 transitions. [2022-01-10 08:23:02,159 INFO L78 Accepts]: Start accepts. Automaton has 6654 states and 8267 transitions. Word has length 159 [2022-01-10 08:23:02,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:02,159 INFO L470 AbstractCegarLoop]: Abstraction has 6654 states and 8267 transitions. [2022-01-10 08:23:02,159 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 08:23:02,159 INFO L276 IsEmpty]: Start isEmpty. Operand 6654 states and 8267 transitions. [2022-01-10 08:23:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-10 08:23:02,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:02,169 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 08:23:02,181 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 08:23:02,378 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 08:23:02,378 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:02,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:02,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1293250061, now seen corresponding path program 1 times [2022-01-10 08:23:02,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:02,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245406967] [2022-01-10 08:23:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:02,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:02,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:02,380 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 08:23:02,382 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 08:23:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:02,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:02,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:02,613 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 08:23:02,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:02,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:02,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245406967] [2022-01-10 08:23:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245406967] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:02,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:02,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:02,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521361333] [2022-01-10 08:23:02,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:02,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:02,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:02,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:02,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:02,614 INFO L87 Difference]: Start difference. First operand 6654 states and 8267 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 08:23:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:02,955 INFO L93 Difference]: Finished difference Result 14386 states and 18824 transitions. [2022-01-10 08:23:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:02,955 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 08:23:02,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:02,982 INFO L225 Difference]: With dead ends: 14386 [2022-01-10 08:23:02,982 INFO L226 Difference]: Without dead ends: 10292 [2022-01-10 08:23:02,994 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 08:23:02,994 INFO L933 BasicCegarLoop]: 359 mSDtfsCounter, 102 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 630 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 08:23:02,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 630 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:03,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10292 states. [2022-01-10 08:23:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10292 to 10216. [2022-01-10 08:23:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 8239 states have (on average 1.2346158514382815) internal successors, (10172), 8394 states have internal predecessors, (10172), 959 states have call successors, (959), 672 states have call predecessors, (959), 1016 states have return successors, (1838), 1150 states have call predecessors, (1838), 957 states have call successors, (1838) [2022-01-10 08:23:03,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 12969 transitions. [2022-01-10 08:23:03,383 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 12969 transitions. Word has length 160 [2022-01-10 08:23:03,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:03,383 INFO L470 AbstractCegarLoop]: Abstraction has 10216 states and 12969 transitions. [2022-01-10 08:23:03,383 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 08:23:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 12969 transitions. [2022-01-10 08:23:03,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-10 08:23:03,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:03,394 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 08:23:03,403 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 08:23:03,601 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 08:23:03,601 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:03,601 INFO L85 PathProgramCache]: Analyzing trace with hash 771551692, now seen corresponding path program 1 times [2022-01-10 08:23:03,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:03,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615151177] [2022-01-10 08:23:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:03,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:03,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:03,603 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 08:23:03,605 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 08:23:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:03,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:03,882 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 08:23:03,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:03,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615151177] [2022-01-10 08:23:03,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615151177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:03,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:03,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:03,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71973514] [2022-01-10 08:23:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:03,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:03,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:03,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:03,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:03,884 INFO L87 Difference]: Start difference. First operand 10216 states and 12969 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 08:23:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:04,359 INFO L93 Difference]: Finished difference Result 25386 states and 33184 transitions. [2022-01-10 08:23:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:04,360 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 08:23:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:04,406 INFO L225 Difference]: With dead ends: 25386 [2022-01-10 08:23:04,407 INFO L226 Difference]: Without dead ends: 17730 [2022-01-10 08:23:04,425 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 08:23:04,425 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 72 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 568 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 08:23:04,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 568 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:04,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17730 states. [2022-01-10 08:23:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17730 to 17726. [2022-01-10 08:23:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17726 states, 14272 states have (on average 1.2403307174887892) internal successors, (17702), 14556 states have internal predecessors, (17702), 1667 states have call successors, (1667), 1158 states have call predecessors, (1667), 1785 states have return successors, (3312), 2012 states have call predecessors, (3312), 1665 states have call successors, (3312) [2022-01-10 08:23:05,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17726 states to 17726 states and 22681 transitions. [2022-01-10 08:23:05,067 INFO L78 Accepts]: Start accepts. Automaton has 17726 states and 22681 transitions. Word has length 161 [2022-01-10 08:23:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:05,067 INFO L470 AbstractCegarLoop]: Abstraction has 17726 states and 22681 transitions. [2022-01-10 08:23:05,067 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 08:23:05,067 INFO L276 IsEmpty]: Start isEmpty. Operand 17726 states and 22681 transitions. [2022-01-10 08:23:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-10 08:23:05,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:05,080 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:05,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:05,287 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 08:23:05,287 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:05,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1984610981, now seen corresponding path program 1 times [2022-01-10 08:23:05,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:05,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853381776] [2022-01-10 08:23:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:05,288 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:05,289 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 08:23:05,290 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 08:23:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:05,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:05,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:05,548 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 08:23:05,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:05,548 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:05,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853381776] [2022-01-10 08:23:05,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853381776] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:05,549 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:05,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:05,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622249794] [2022-01-10 08:23:05,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:05,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 08:23:05,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 08:23:05,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-10 08:23:05,550 INFO L87 Difference]: Start difference. First operand 17726 states and 22681 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 3 states have internal predecessors, (87), 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 08:23:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:06,863 INFO L93 Difference]: Finished difference Result 47279 states and 61335 transitions. [2022-01-10 08:23:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 08:23:06,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 3 states have internal predecessors, (87), 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 08:23:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:06,974 INFO L225 Difference]: With dead ends: 47279 [2022-01-10 08:23:06,974 INFO L226 Difference]: Without dead ends: 31798 [2022-01-10 08:23:07,008 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 08:23:07,008 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 390 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:07,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 596 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 08:23:07,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31798 states. [2022-01-10 08:23:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31798 to 31622. [2022-01-10 08:23:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31622 states, 25262 states have (on average 1.2420631778956535) internal successors, (31377), 25769 states have internal predecessors, (31377), 3062 states have call successors, (3062), 2109 states have call predecessors, (3062), 3296 states have return successors, (6106), 3744 states have call predecessors, (6106), 3060 states have call successors, (6106) [2022-01-10 08:23:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31622 states to 31622 states and 40545 transitions. [2022-01-10 08:23:08,267 INFO L78 Accepts]: Start accepts. Automaton has 31622 states and 40545 transitions. Word has length 166 [2022-01-10 08:23:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:08,267 INFO L470 AbstractCegarLoop]: Abstraction has 31622 states and 40545 transitions. [2022-01-10 08:23:08,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 3 states have internal predecessors, (87), 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 08:23:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 31622 states and 40545 transitions. [2022-01-10 08:23:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-10 08:23:08,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:08,368 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:23:08,374 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 08:23:08,568 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 08:23:08,568 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:08,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:08,569 INFO L85 PathProgramCache]: Analyzing trace with hash -122202029, now seen corresponding path program 1 times [2022-01-10 08:23:08,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:08,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501453302] [2022-01-10 08:23:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:08,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:08,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:08,570 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 08:23:08,571 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 08:23:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:08,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:08,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-01-10 08:23:08,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:08,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:08,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501453302] [2022-01-10 08:23:08,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501453302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:08,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:08,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:08,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091057893] [2022-01-10 08:23:08,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:08,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:08,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:08,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:08,815 INFO L87 Difference]: Start difference. First operand 31622 states and 40545 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 08:23:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:09,794 INFO L93 Difference]: Finished difference Result 34844 states and 44340 transitions. [2022-01-10 08:23:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:09,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 175 [2022-01-10 08:23:09,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:09,871 INFO L225 Difference]: With dead ends: 34844 [2022-01-10 08:23:09,872 INFO L226 Difference]: Without dead ends: 32342 [2022-01-10 08:23:09,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 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 08:23:09,886 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 240 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:09,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 413 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32342 states. [2022-01-10 08:23:11,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32342 to 32330. [2022-01-10 08:23:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32330 states, 25838 states have (on average 1.2386020589828934) internal successors, (32003), 26355 states have internal predecessors, (32003), 3134 states have call successors, (3134), 2161 states have call predecessors, (3134), 3356 states have return successors, (6214), 3814 states have call predecessors, (6214), 3132 states have call successors, (6214) [2022-01-10 08:23:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32330 states to 32330 states and 41351 transitions. [2022-01-10 08:23:11,280 INFO L78 Accepts]: Start accepts. Automaton has 32330 states and 41351 transitions. Word has length 175 [2022-01-10 08:23:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:11,281 INFO L470 AbstractCegarLoop]: Abstraction has 32330 states and 41351 transitions. [2022-01-10 08:23:11,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-01-10 08:23:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 32330 states and 41351 transitions. [2022-01-10 08:23:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-10 08:23:11,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:11,297 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2022-01-10 08:23:11,303 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 08:23:11,497 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 08:23:11,498 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:11,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:11,498 INFO L85 PathProgramCache]: Analyzing trace with hash -609020054, now seen corresponding path program 2 times [2022-01-10 08:23:11,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:11,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512340466] [2022-01-10 08:23:11,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:23:11,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:11,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:11,500 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 08:23:11,500 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 08:23:11,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:23:11,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:23:11,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-01-10 08:23:11,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:11,763 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:11,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512340466] [2022-01-10 08:23:11,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512340466] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:11,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:11,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:11,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86244588] [2022-01-10 08:23:11,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:11,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:11,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:11,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:11,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:11,764 INFO L87 Difference]: Start difference. First operand 32330 states and 41351 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 08:23:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:12,770 INFO L93 Difference]: Finished difference Result 33436 states and 42612 transitions. [2022-01-10 08:23:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:12,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 175 [2022-01-10 08:23:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:12,833 INFO L225 Difference]: With dead ends: 33436 [2022-01-10 08:23:12,834 INFO L226 Difference]: Without dead ends: 29383 [2022-01-10 08:23:12,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 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 08:23:12,844 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 86 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 620 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 08:23:12,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 620 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29383 states. [2022-01-10 08:23:13,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29383 to 29383. [2022-01-10 08:23:13,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29383 states, 23428 states have (on average 1.2513232030049513) internal successors, (29316), 23909 states have internal predecessors, (29316), 2842 states have call successors, (2842), 1953 states have call predecessors, (2842), 3112 states have return successors, (5846), 3520 states have call predecessors, (5846), 2840 states have call successors, (5846) [2022-01-10 08:23:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29383 states to 29383 states and 38004 transitions. [2022-01-10 08:23:13,880 INFO L78 Accepts]: Start accepts. Automaton has 29383 states and 38004 transitions. Word has length 175 [2022-01-10 08:23:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:13,880 INFO L470 AbstractCegarLoop]: Abstraction has 29383 states and 38004 transitions. [2022-01-10 08:23:13,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-10 08:23:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 29383 states and 38004 transitions. [2022-01-10 08:23:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 08:23:13,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:13,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:13,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-01-10 08:23:14,104 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 08:23:14,105 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:14,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:14,105 INFO L85 PathProgramCache]: Analyzing trace with hash 644669941, now seen corresponding path program 1 times [2022-01-10 08:23:14,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:14,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260526479] [2022-01-10 08:23:14,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:14,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:14,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:14,106 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 08:23:14,108 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 08:23:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 08:23:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:14,392 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 08:23:14,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:14,393 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:14,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260526479] [2022-01-10 08:23:14,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260526479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:14,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:14,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 08:23:14,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686062213] [2022-01-10 08:23:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:14,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 08:23:14,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 08:23:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 08:23:14,394 INFO L87 Difference]: Start difference. First operand 29383 states and 38004 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 08:23:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:15,189 INFO L93 Difference]: Finished difference Result 47011 states and 61101 transitions. [2022-01-10 08:23:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 08:23:15,190 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 08:23:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:15,235 INFO L225 Difference]: With dead ends: 47011 [2022-01-10 08:23:15,235 INFO L226 Difference]: Without dead ends: 17676 [2022-01-10 08:23:15,279 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 08:23:15,280 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 159 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 08:23:15,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 319 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 08:23:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17676 states. [2022-01-10 08:23:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17676 to 17676. [2022-01-10 08:23:15,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17676 states, 14297 states have (on average 1.2520109113800098) internal successors, (17900), 14544 states have internal predecessors, (17900), 1618 states have call successors, (1618), 1057 states have call predecessors, (1618), 1760 states have return successors, (3226), 2074 states have call predecessors, (3226), 1616 states have call successors, (3226) [2022-01-10 08:23:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17676 states to 17676 states and 22744 transitions. [2022-01-10 08:23:15,923 INFO L78 Accepts]: Start accepts. Automaton has 17676 states and 22744 transitions. Word has length 185 [2022-01-10 08:23:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:15,923 INFO L470 AbstractCegarLoop]: Abstraction has 17676 states and 22744 transitions. [2022-01-10 08:23:15,923 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 08:23:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 17676 states and 22744 transitions. [2022-01-10 08:23:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 08:23:15,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:15,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:23:15,939 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 08:23:16,139 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 08:23:16,139 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:16,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2122515595, now seen corresponding path program 2 times [2022-01-10 08:23:16,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:16,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225499586] [2022-01-10 08:23:16,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:23:16,140 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:16,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:16,141 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 08:23:16,141 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 08:23:16,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 08:23:16,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:23:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:16,368 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 08:23:16,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:16,368 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:16,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225499586] [2022-01-10 08:23:16,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225499586] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:16,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:16,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:16,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624415534] [2022-01-10 08:23:16,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:16,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:16,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:16,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:16,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:16,369 INFO L87 Difference]: Start difference. First operand 17676 states and 22744 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 08:23:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:17,472 INFO L93 Difference]: Finished difference Result 52142 states and 67204 transitions. [2022-01-10 08:23:17,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:17,472 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 08:23:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:17,567 INFO L225 Difference]: With dead ends: 52142 [2022-01-10 08:23:17,567 INFO L226 Difference]: Without dead ends: 34611 [2022-01-10 08:23:17,605 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 08:23:17,605 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 129 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 389 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 08:23:17,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 389 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34611 states. [2022-01-10 08:23:18,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34611 to 34434. [2022-01-10 08:23:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34434 states, 27787 states have (on average 1.247993666102854) internal successors, (34678), 28200 states have internal predecessors, (34678), 3220 states have call successors, (3220), 2099 states have call predecessors, (3220), 3426 states have return successors, (6307), 4134 states have call predecessors, (6307), 3218 states have call successors, (6307) [2022-01-10 08:23:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34434 states to 34434 states and 44205 transitions. [2022-01-10 08:23:18,965 INFO L78 Accepts]: Start accepts. Automaton has 34434 states and 44205 transitions. Word has length 185 [2022-01-10 08:23:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:18,965 INFO L470 AbstractCegarLoop]: Abstraction has 34434 states and 44205 transitions. [2022-01-10 08:23:18,965 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 08:23:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34434 states and 44205 transitions. [2022-01-10 08:23:18,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-10 08:23:18,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:18,972 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 08:23:18,978 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 08:23:19,172 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 08:23:19,172 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:19,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1370034891, now seen corresponding path program 1 times [2022-01-10 08:23:19,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:19,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539003061] [2022-01-10 08:23:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:19,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:19,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:19,174 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 08:23:19,175 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 08:23:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:19,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:19,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:19,427 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 08:23:19,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:19,427 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:19,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539003061] [2022-01-10 08:23:19,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539003061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:19,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:19,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:19,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136684797] [2022-01-10 08:23:19,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:19,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:19,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:19,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:19,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:19,429 INFO L87 Difference]: Start difference. First operand 34434 states and 44205 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 08:23:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:20,794 INFO L93 Difference]: Finished difference Result 68498 states and 87935 transitions. [2022-01-10 08:23:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:20,794 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 08:23:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:20,885 INFO L225 Difference]: With dead ends: 68498 [2022-01-10 08:23:20,885 INFO L226 Difference]: Without dead ends: 34160 [2022-01-10 08:23:20,934 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 08:23:20,934 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 115 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 365 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 08:23:20,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 365 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34160 states. [2022-01-10 08:23:22,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34160 to 34156. [2022-01-10 08:23:22,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34156 states, 27527 states have (on average 1.2282849565880771) internal successors, (33811), 28004 states have internal predecessors, (33811), 3211 states have call successors, (3211), 2090 states have call predecessors, (3211), 3417 states have return successors, (5525), 4061 states have call predecessors, (5525), 3209 states have call successors, (5525) [2022-01-10 08:23:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34156 states to 34156 states and 42547 transitions. [2022-01-10 08:23:22,322 INFO L78 Accepts]: Start accepts. Automaton has 34156 states and 42547 transitions. Word has length 185 [2022-01-10 08:23:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:22,322 INFO L470 AbstractCegarLoop]: Abstraction has 34156 states and 42547 transitions. [2022-01-10 08:23:22,322 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 08:23:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 34156 states and 42547 transitions. [2022-01-10 08:23:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-10 08:23:22,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:23:22,324 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 08:23:22,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-01-10 08:23:22,524 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 08:23:22,524 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:23:22,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:23:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash 511494895, now seen corresponding path program 1 times [2022-01-10 08:23:22,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 08:23:22,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517811325] [2022-01-10 08:23:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:23:22,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 08:23:22,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 08:23:22,526 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 08:23:22,527 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 08:23:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:23:22,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 08:23:22,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:23:22,809 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 08:23:22,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 08:23:22,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 08:23:22,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517811325] [2022-01-10 08:23:22,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517811325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:23:22,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:23:22,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:23:22,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311915749] [2022-01-10 08:23:22,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:23:22,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:23:22,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 08:23:22,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:23:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:23:22,810 INFO L87 Difference]: Start difference. First operand 34156 states and 42547 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 08:23:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:23:23,265 INFO L93 Difference]: Finished difference Result 39150 states and 48752 transitions. [2022-01-10 08:23:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:23:23,266 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 08:23:23,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:23:23,271 INFO L225 Difference]: With dead ends: 39150 [2022-01-10 08:23:23,271 INFO L226 Difference]: Without dead ends: 0 [2022-01-10 08:23:23,302 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 08:23:23,302 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 80 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 254 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 08:23:23,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 254 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:23:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-10 08:23:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-10 08:23:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 08:23:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-10 08:23:23,304 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 191 [2022-01-10 08:23:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:23:23,304 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-10 08:23:23,304 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 08:23:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-10 08:23:23,304 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-10 08:23:23,306 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-01-10 08:23:23,307 INFO L764 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-01-10 08:23:23,313 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 08:23:23,508 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 08:23:23,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.