/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:56:48,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:56:48,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:56:48,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:56:48,622 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:56:48,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:56:48,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:56:48,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:56:48,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:56:48,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:56:48,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:56:48,631 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:56:48,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:56:48,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:56:48,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:56:48,636 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:56:48,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:56:48,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:56:48,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:56:48,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:56:48,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:56:48,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:56:48,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:56:48,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:56:48,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 10:56:48,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:56:48,654 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:56:48,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:56:48,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:56:48,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:56:48,655 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:56:48,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:56:48,656 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:56:48,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:56:48,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:56:48,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:56:48,658 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:56:48,679 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:56:48,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:56:48,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:56:48,680 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:56:48,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:56:48,681 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:56:48,681 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:56:48,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:56:48,681 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:56:48,681 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:56:48,681 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:56:48,682 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:56:48,682 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:56:48,682 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:56:48,682 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:56:48,682 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:56:48,682 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:56:48,682 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:56:48,682 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:56:48,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:56:48,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:56:48,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:56:48,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:56:48,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:56:48,684 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:56:48,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:56:48,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:56:48,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:56:48,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:56:48,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:56:48,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:56:48,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:56:48,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:56:48,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:56:48,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:56:48,893 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:56:48,893 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:56:48,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-04-01 10:56:49,870 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:56:50,055 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:56:50,056 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-04-01 10:56:50,063 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8edfe44/29eda0f56e8246b3ae63fc65a6136caf/FLAG1224e524d [2023-04-01 10:56:50,072 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea8edfe44/29eda0f56e8246b3ae63fc65a6136caf [2023-04-01 10:56:50,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:56:50,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:56:50,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:56:50,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:56:50,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:56:50,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb4f916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50, skipping insertion in model container [2023-04-01 10:56:50,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:56:50,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:56:50,306 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2023-04-01 10:56:50,311 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2023-04-01 10:56:50,316 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2023-04-01 10:56:50,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:56:50,329 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:56:50,372 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2023-04-01 10:56:50,373 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2023-04-01 10:56:50,373 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2023-04-01 10:56:50,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:56:50,398 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:56:50,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50 WrapperNode [2023-04-01 10:56:50,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:56:50,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:56:50,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:56:50,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:56:50,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,444 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:56:50,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:56:50,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:56:50,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:56:50,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (1/1) ... [2023-04-01 10:56:50,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:56:50,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:50,492 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) [2023-04-01 10:56:50,501 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 [2023-04-01 10:56:50,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_del [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2023-04-01 10:56:50,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add_tail [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_empty [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_set [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_add [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_del [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_empty [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-04-01 10:56:50,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2023-04-01 10:56:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2023-04-01 10:56:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:56:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:56:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:56:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:56:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:56:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:56:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:56:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:56:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:56:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:56:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:56:50,531 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:56:50,532 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:56:50,533 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:56:50,534 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:56:50,535 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:56:50,536 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:56:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_del [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add_tail [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_empty [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_set [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_add [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_del [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2023-04-01 10:56:50,538 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_empty [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:56:50,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:56:50,747 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:56:50,749 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:56:50,946 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:56:51,013 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:56:51,013 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 10:56:51,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:56:51 BoogieIcfgContainer [2023-04-01 10:56:51,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:56:51,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:56:51,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:56:51,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:56:51,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:56:50" (1/3) ... [2023-04-01 10:56:51,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718ee56b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:56:51, skipping insertion in model container [2023-04-01 10:56:51,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:50" (2/3) ... [2023-04-01 10:56:51,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@718ee56b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:56:51, skipping insertion in model container [2023-04-01 10:56:51,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:56:51" (3/3) ... [2023-04-01 10:56:51,024 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex_unlock_at_exit.i [2023-04-01 10:56:51,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:56:51,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-04-01 10:56:51,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:56:51,082 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6d05e043, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:56:51,082 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-04-01 10:56:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 23 states have call successors, (23), 18 states have call predecessors, (23), 18 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-04-01 10:56:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 10:56:51,091 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:51,091 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 10:56:51,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:51,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1840463953, now seen corresponding path program 1 times [2023-04-01 10:56:51,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:51,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776909176] [2023-04-01 10:56:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:51,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:56:51,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:51,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776909176] [2023-04-01 10:56:51,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776909176] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:51,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:56:51,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 10:56:51,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439821355] [2023-04-01 10:56:51,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:51,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 10:56:51,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:51,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 10:56:51,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:56:51,483 INFO L87 Difference]: Start difference. First operand has 94 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 23 states have call successors, (23), 18 states have call predecessors, (23), 18 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 10:56:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:51,584 INFO L93 Difference]: Finished difference Result 175 states and 203 transitions. [2023-04-01 10:56:51,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 10:56:51,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 34 [2023-04-01 10:56:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:51,593 INFO L225 Difference]: With dead ends: 175 [2023-04-01 10:56:51,593 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 10:56:51,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:56:51,598 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:51,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 253 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:56:51,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 10:56:51,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-04-01 10:56:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 23 states have call successors, (23), 18 states have call predecessors, (23), 16 states have return successors, (23), 21 states have call predecessors, (23), 20 states have call successors, (23) [2023-04-01 10:56:51,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2023-04-01 10:56:51,632 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 34 [2023-04-01 10:56:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:51,632 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2023-04-01 10:56:51,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2023-04-01 10:56:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2023-04-01 10:56:51,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 10:56:51,634 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:51,634 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 10:56:51,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:56:51,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:51,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash 342038564, now seen corresponding path program 1 times [2023-04-01 10:56:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:51,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816584829] [2023-04-01 10:56:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:51,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:56:51,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:51,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816584829] [2023-04-01 10:56:51,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816584829] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:51,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:56:51,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:56:51,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611058767] [2023-04-01 10:56:51,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:51,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:56:51,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:56:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:56:51,940 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 10:56:52,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:52,296 INFO L93 Difference]: Finished difference Result 235 states and 284 transitions. [2023-04-01 10:56:52,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 10:56:52,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 35 [2023-04-01 10:56:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:52,304 INFO L225 Difference]: With dead ends: 235 [2023-04-01 10:56:52,304 INFO L226 Difference]: Without dead ends: 160 [2023-04-01 10:56:52,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:56:52,307 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 84 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:52,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 283 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 10:56:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-04-01 10:56:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2023-04-01 10:56:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 76 states have internal predecessors, (85), 32 states have call successors, (32), 25 states have call predecessors, (32), 24 states have return successors, (38), 29 states have call predecessors, (38), 29 states have call successors, (38) [2023-04-01 10:56:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2023-04-01 10:56:52,328 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 35 [2023-04-01 10:56:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:52,331 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2023-04-01 10:56:52,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 10:56:52,332 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2023-04-01 10:56:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 10:56:52,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:52,335 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2023-04-01 10:56:52,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:56:52,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:52,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:52,337 INFO L85 PathProgramCache]: Analyzing trace with hash -162523397, now seen corresponding path program 1 times [2023-04-01 10:56:52,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:52,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285517787] [2023-04-01 10:56:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:52,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 10:56:52,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:52,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285517787] [2023-04-01 10:56:52,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285517787] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:56:52,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968830730] [2023-04-01 10:56:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:52,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:52,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:56:52,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:56:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:52,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 10:56:52,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:56:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 10:56:52,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:56:52,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968830730] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:52,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:56:52,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-01 10:56:52,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803461801] [2023-04-01 10:56:52,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:52,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 10:56:52,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 10:56:52,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:56:52,690 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-04-01 10:56:52,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:52,737 INFO L93 Difference]: Finished difference Result 232 states and 278 transitions. [2023-04-01 10:56:52,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 10:56:52,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 78 [2023-04-01 10:56:52,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:52,738 INFO L225 Difference]: With dead ends: 232 [2023-04-01 10:56:52,738 INFO L226 Difference]: Without dead ends: 136 [2023-04-01 10:56:52,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:56:52,739 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:52,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 232 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 10:56:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-04-01 10:56:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-04-01 10:56:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 80 states have internal predecessors, (90), 32 states have call successors, (32), 25 states have call predecessors, (32), 25 states have return successors, (39), 31 states have call predecessors, (39), 29 states have call successors, (39) [2023-04-01 10:56:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2023-04-01 10:56:52,750 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 78 [2023-04-01 10:56:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:52,751 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2023-04-01 10:56:52,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2023-04-01 10:56:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2023-04-01 10:56:52,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 10:56:52,752 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:52,752 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:56:52,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:56:52,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:52,958 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:52,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2032890405, now seen corresponding path program 1 times [2023-04-01 10:56:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:52,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739556752] [2023-04-01 10:56:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:52,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 10:56:53,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:53,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739556752] [2023-04-01 10:56:53,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739556752] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:56:53,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55176458] [2023-04-01 10:56:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:53,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:56:53,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:53,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:56:53,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:56:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:53,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-01 10:56:53,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:56:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 10:56:54,231 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:56:54,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55176458] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:54,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:56:54,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2023-04-01 10:56:54,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637927474] [2023-04-01 10:56:54,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:54,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 10:56:54,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:54,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 10:56:54,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-04-01 10:56:54,233 INFO L87 Difference]: Start difference. First operand 136 states and 161 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 10:56:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:54,984 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2023-04-01 10:56:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 10:56:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2023-04-01 10:56:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:54,989 INFO L225 Difference]: With dead ends: 304 [2023-04-01 10:56:54,990 INFO L226 Difference]: Without dead ends: 193 [2023-04-01 10:56:54,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2023-04-01 10:56:54,997 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 205 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:56:54,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 258 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 10:56:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-04-01 10:56:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 138. [2023-04-01 10:56:55,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 84 states have internal predecessors, (93), 30 states have call successors, (30), 25 states have call predecessors, (30), 26 states have return successors, (38), 28 states have call predecessors, (38), 27 states have call successors, (38) [2023-04-01 10:56:55,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2023-04-01 10:56:55,027 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 80 [2023-04-01 10:56:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:55,028 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2023-04-01 10:56:55,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (15), 5 states have call predecessors, (15), 7 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-04-01 10:56:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2023-04-01 10:56:55,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 10:56:55,034 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:55,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:56:55,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:56:55,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 10:56:55,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:55,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:55,240 INFO L85 PathProgramCache]: Analyzing trace with hash -2036590775, now seen corresponding path program 1 times [2023-04-01 10:56:55,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:55,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589752600] [2023-04-01 10:56:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:55,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:00,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 10:57:00,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589752600] [2023-04-01 10:57:00,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589752600] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:00,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472655816] [2023-04-01 10:57:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:00,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:00,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:00,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:57:00,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:57:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:00,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 224 conjunts are in the unsatisfiable core [2023-04-01 10:57:00,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:57:00,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2023-04-01 10:57:01,083 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 10:57:01,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 10:57:01,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2023-04-01 10:57:01,423 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-04-01 10:57:01,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-04-01 10:57:03,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:03,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:03,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:57:03,526 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:57:03,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:03,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 36 [2023-04-01 10:57:03,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:03,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:03,587 INFO L321 Elim1Store]: treesize reduction 158, result has 24.0 percent of original size [2023-04-01 10:57:03,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 156 treesize of output 134 [2023-04-01 10:57:03,603 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-04-01 10:57:03,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 150 [2023-04-01 10:57:03,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:03,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 110 [2023-04-01 10:57:03,638 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2023-04-01 10:57:03,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 94 [2023-04-01 10:57:03,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2023-04-01 10:57:03,667 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-04-01 10:57:03,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-04-01 10:57:03,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:03,688 INFO L321 Elim1Store]: treesize reduction 8, result has 79.5 percent of original size [2023-04-01 10:57:03,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 43 [2023-04-01 10:57:03,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 10:57:03,707 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:57:03,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2023-04-01 10:57:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 10:57:04,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:57:06,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472655816] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:06,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270054516] [2023-04-01 10:57:06,855 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-04-01 10:57:06,856 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:57:06,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:57:06,861 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:57:06,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:57:07,011 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 80 for LOIs [2023-04-01 10:57:07,037 INFO L197 IcfgInterpreter]: Interpreting procedure foo with input of size 80 for LOIs [2023-04-01 10:57:08,188 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_initialize with input of size 70 for LOIs [2023-04-01 10:57:08,195 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 64 for LOIs [2023-04-01 10:57:08,440 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_add with input of size 40 for LOIs [2023-04-01 10:57:08,671 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 42 for LOIs [2023-04-01 10:57:08,733 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2023-04-01 10:57:08,739 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 25 for LOIs [2023-04-01 10:57:08,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 10:57:08,809 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 61 for LOIs [2023-04-01 10:57:08,908 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 69 for LOIs [2023-04-01 10:57:08,920 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:57:17,566 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2998#(and (= |old(#length)| |#length|) (= mutex_lock_~m.offset 0) (not (= |#StackHeapBarrier| mutex_lock_~m.base)) (= |~#mutexes~0.base| 3) (= |#memory_int| |old(#memory_int)|) (= |mutex_lock_#in~m.offset| 0) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (= |~#mutexes~0.offset| 0) (not (= mutex_lock_~m.base 0)) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= |mutex_lock_#in~m.base| mutex_lock_~m.base) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |old(#valid)| |#valid|) (= |#NULL.base| 0))' at error location [2023-04-01 10:57:17,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:57:17,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:57:17,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 68 [2023-04-01 10:57:17,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141737691] [2023-04-01 10:57:17,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 10:57:17,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-04-01 10:57:17,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:57:17,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-04-01 10:57:17,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=11334, Unknown=32, NotChecked=0, Total=11990 [2023-04-01 10:57:17,572 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 68 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 49 states have internal predecessors, (70), 25 states have call successors, (34), 15 states have call predecessors, (34), 22 states have return successors, (29), 26 states have call predecessors, (29), 23 states have call successors, (29) [2023-04-01 10:57:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:57:29,075 INFO L93 Difference]: Finished difference Result 316 states and 371 transitions. [2023-04-01 10:57:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-04-01 10:57:29,076 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 49 states have internal predecessors, (70), 25 states have call successors, (34), 15 states have call predecessors, (34), 22 states have return successors, (29), 26 states have call predecessors, (29), 23 states have call successors, (29) Word has length 72 [2023-04-01 10:57:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:57:29,078 INFO L225 Difference]: With dead ends: 316 [2023-04-01 10:57:29,078 INFO L226 Difference]: Without dead ends: 214 [2023-04-01 10:57:29,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6188 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=1433, Invalid=22096, Unknown=33, NotChecked=0, Total=23562 [2023-04-01 10:57:29,083 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 562 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 5404 mSolverCounterSat, 258 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 5673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 5404 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:57:29,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1618 Invalid, 5673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 5404 Invalid, 11 Unknown, 0 Unchecked, 6.0s Time] [2023-04-01 10:57:29,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-04-01 10:57:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 155. [2023-04-01 10:57:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 96 states have internal predecessors, (110), 31 states have call successors, (31), 28 states have call predecessors, (31), 30 states have return successors, (38), 30 states have call predecessors, (38), 28 states have call successors, (38) [2023-04-01 10:57:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 179 transitions. [2023-04-01 10:57:29,110 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 179 transitions. Word has length 72 [2023-04-01 10:57:29,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:57:29,110 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 179 transitions. [2023-04-01 10:57:29,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 49 states have internal predecessors, (70), 25 states have call successors, (34), 15 states have call predecessors, (34), 22 states have return successors, (29), 26 states have call predecessors, (29), 23 states have call successors, (29) [2023-04-01 10:57:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 179 transitions. [2023-04-01 10:57:29,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 10:57:29,111 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:29,111 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:57:29,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 10:57:29,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:29,314 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:29,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:29,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1903512326, now seen corresponding path program 1 times [2023-04-01 10:57:29,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:29,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488260265] [2023-04-01 10:57:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:29,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 10:57:33,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488260265] [2023-04-01 10:57:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488260265] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38828132] [2023-04-01 10:57:33,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:33,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:33,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:33,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:57:33,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 10:57:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:33,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 230 conjunts are in the unsatisfiable core [2023-04-01 10:57:33,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:57:33,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2023-04-01 10:57:33,790 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 10:57:33,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 10:57:33,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2023-04-01 10:57:34,002 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 10:57:34,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 10:57:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:36,386 INFO L321 Elim1Store]: treesize reduction 275, result has 14.1 percent of original size [2023-04-01 10:57:36,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 285 treesize of output 219 [2023-04-01 10:57:36,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:36,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2023-04-01 10:57:36,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:36,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:36,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 52 [2023-04-01 10:57:36,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 71 [2023-04-01 10:57:36,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 66 [2023-04-01 10:57:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:36,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 10:57:36,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-04-01 10:57:36,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 23 [2023-04-01 10:57:36,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 18 [2023-04-01 10:57:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:57:37,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:57:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38828132] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:39,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476398014] [2023-04-01 10:57:39,677 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-04-01 10:57:39,677 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:57:39,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:57:39,678 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:57:39,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:57:39,740 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 80 for LOIs [2023-04-01 10:57:39,751 INFO L197 IcfgInterpreter]: Interpreting procedure foo with input of size 80 for LOIs [2023-04-01 10:57:40,297 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_initialize with input of size 70 for LOIs [2023-04-01 10:57:40,301 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 64 for LOIs [2023-04-01 10:57:40,504 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_add with input of size 40 for LOIs [2023-04-01 10:57:40,681 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 42 for LOIs [2023-04-01 10:57:40,735 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 56 for LOIs [2023-04-01 10:57:40,740 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 25 for LOIs [2023-04-01 10:57:40,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 10:57:40,850 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 61 for LOIs [2023-04-01 10:57:40,949 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 70 for LOIs [2023-04-01 10:57:40,959 INFO L180 IcfgInterpreter]: Interpretation finished