/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 OctagonDomain -i ../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:41:18,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:41:18,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:41:18,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:41:18,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:41:18,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:41:18,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:41:18,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:41:18,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:41:18,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:41:18,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:41:18,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:41:18,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:41:18,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:41:18,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:41:18,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:41:18,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:41:18,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:41:18,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:41:18,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:41:18,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:41:18,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:41:18,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:41:18,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:41:18,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 21:41:18,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:41:18,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:41:18,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:41:18,176 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 [2023-04-02 21:41:18,208 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:41:18,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:41:18,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:41:18,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:41:18,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:41:18,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:41:18,213 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:41:18,213 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:41:18,213 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:41:18,213 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:41:18,214 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:41:18,214 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:41:18,214 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:41:18,214 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:41:18,214 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:41:18,214 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:41:18,214 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:41:18,215 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:41:18,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:41:18,215 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:41:18,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:41:18,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:41:18,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:41:18,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:41:18,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:41:18,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:41:18,220 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:41:18,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:41:18,221 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:41:18,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:41:18,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:41:18,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:41:18,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:41:18,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:41:18,221 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:41:18,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:41:18,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:41:18,222 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:41:18,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:41:18,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:41:18,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:41:18,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:41:18,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:41:18,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:41:18,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:41:18,460 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:41:18,461 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:41:18,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-04-02 21:41:19,523 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:41:19,793 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:41:19,794 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-04-02 21:41:19,814 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aefe69c62/66c5665782ff49979da2ea98c5504aed/FLAG1bf388d3f [2023-04-02 21:41:19,830 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aefe69c62/66c5665782ff49979da2ea98c5504aed [2023-04-02 21:41:19,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:41:19,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:41:19,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:41:19,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:41:19,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:41:19,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:41:19" (1/1) ... [2023-04-02 21:41:19,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5460718b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:19, skipping insertion in model container [2023-04-02 21:41:19,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:41:19" (1/1) ... [2023-04-02 21:41:19,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:41:19,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:41:20,192 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] [2023-04-02 21:41:20,196 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] [2023-04-02 21:41:20,197 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] [2023-04-02 21:41:20,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:41:20,211 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:41:20,247 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] [2023-04-02 21:41:20,248 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] [2023-04-02 21:41:20,249 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] [2023-04-02 21:41:20,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:41:20,273 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:41:20,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20 WrapperNode [2023-04-02 21:41:20,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:41:20,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:41:20,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:41:20,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:41:20,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (1/1) ... [2023-04-02 21:41:20,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (1/1) ... [2023-04-02 21:41:20,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (1/1) ... [2023-04-02 21:41:20,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (1/1) ... [2023-04-02 21:41:20,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (1/1) ... [2023-04-02 21:41:20,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (1/1) ... [2023-04-02 21:41:20,319 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (1/1) ... [2023-04-02 21:41:20,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (1/1) ... [2023-04-02 21:41:20,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:41:20,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:41:20,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:41:20,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:41:20,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (1/1) ... [2023-04-02 21:41:20,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:41:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:41:20,359 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) [2023-04-02 21:41:20,380 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 [2023-04-02 21:41:20,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:41:20,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_del [2023-04-02 21:41:20,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_add_tail [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_del [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_list_empty [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_set [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_add [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_del [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_empty [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2023-04-02 21:41:20,395 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-04-02 21:41:20,396 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-04-02 21:41:20,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2023-04-02 21:41:20,396 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2023-04-02 21:41:20,397 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:41:20,397 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 21:41:20,397 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 21:41:20,397 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 21:41:20,397 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 21:41:20,398 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 21:41:20,398 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 21:41:20,399 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 21:41:20,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 21:41:20,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 21:41:20,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 21:41:20,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 21:41:20,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 21:41:20,399 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 21:41:20,400 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 21:41:20,400 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 21:41:20,401 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 21:41:20,401 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 21:41:20,401 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 21:41:20,401 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 21:41:20,401 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 21:41:20,401 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 21:41:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 21:41:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 21:41:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 21:41:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 21:41:20,402 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 21:41:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 21:41:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 21:41:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 21:41:20,403 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 21:41:20,404 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 21:41:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 21:41:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 21:41:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 21:41:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 21:41:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 21:41:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 21:41:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 21:41:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 21:41:20,405 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 21:41:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 21:41:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 21:41:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 21:41:20,406 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 21:41:20,407 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 21:41:20,408 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 21:41:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 21:41:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 21:41:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 21:41:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 21:41:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 21:41:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 21:41:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 21:41:20,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 21:41:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 21:41:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 21:41:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 21:41:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 21:41:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 21:41:20,410 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 21:41:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 21:41:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 21:41:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 21:41:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 21:41:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 21:41:20,411 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 21:41:20,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-04-02 21:41:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_del [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_add_tail [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_del [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_list_empty [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_set [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_add [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_del [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_empty [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:41:20,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:41:20,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:41:20,705 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:41:20,707 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:41:20,965 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:41:21,013 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:41:21,013 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 21:41:21,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:41:21 BoogieIcfgContainer [2023-04-02 21:41:21,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:41:21,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:41:21,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:41:21,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:41:21,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:41:19" (1/3) ... [2023-04-02 21:41:21,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0efbb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:41:21, skipping insertion in model container [2023-04-02 21:41:21,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:41:20" (2/3) ... [2023-04-02 21:41:21,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d0efbb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:41:21, skipping insertion in model container [2023-04-02 21:41:21,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:41:21" (3/3) ... [2023-04-02 21:41:21,023 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex_unlock_at_exit.i [2023-04-02 21:41:21,036 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:41:21,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-04-02 21:41:21,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:41:21,078 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;@1f87bd44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:41:21,078 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-04-02 21:41:21,081 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) [2023-04-02 21:41:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 21:41:21,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:41:21,087 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] [2023-04-02 21:41:21,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:41:21,091 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:41:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1840463953, now seen corresponding path program 1 times [2023-04-02 21:41:21,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:41:21,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162914972] [2023-04-02 21:41:21,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:41:21,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:41:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:41:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 21:41:21,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:41:21,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162914972] [2023-04-02 21:41:21,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162914972] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:41:21,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:41:21,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 21:41:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629217688] [2023-04-02 21:41:21,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:41:21,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 21:41:21,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:41:21,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 21:41:21,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 21:41:21,488 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) [2023-04-02 21:41:21,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:41:21,594 INFO L93 Difference]: Finished difference Result 175 states and 203 transitions. [2023-04-02 21:41:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 21:41:21,597 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 [2023-04-02 21:41:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:41:21,606 INFO L225 Difference]: With dead ends: 175 [2023-04-02 21:41:21,606 INFO L226 Difference]: Without dead ends: 88 [2023-04-02 21:41:21,609 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 [2023-04-02 21:41:21,614 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 [2023-04-02 21:41:21,615 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] [2023-04-02 21:41:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-02 21:41:21,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-04-02 21:41:21,653 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) [2023-04-02 21:41:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2023-04-02 21:41:21,656 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 34 [2023-04-02 21:41:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:41:21,656 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2023-04-02 21:41:21,657 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) [2023-04-02 21:41:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2023-04-02 21:41:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 21:41:21,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:41:21,658 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] [2023-04-02 21:41:21,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:41:21,659 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:41:21,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:41:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash 342038564, now seen corresponding path program 1 times [2023-04-02 21:41:21,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:41:21,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142214398] [2023-04-02 21:41:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:41:21,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:41:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:41:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 21:41:22,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:41:22,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142214398] [2023-04-02 21:41:22,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142214398] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:41:22,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:41:22,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 21:41:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698072529] [2023-04-02 21:41:22,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:41:22,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:41:22,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:41:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:41:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:41:22,189 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) [2023-04-02 21:41:22,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:41:22,590 INFO L93 Difference]: Finished difference Result 235 states and 284 transitions. [2023-04-02 21:41:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 21:41:22,590 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 [2023-04-02 21:41:22,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:41:22,596 INFO L225 Difference]: With dead ends: 235 [2023-04-02 21:41:22,596 INFO L226 Difference]: Without dead ends: 160 [2023-04-02 21:41:22,597 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 [2023-04-02 21:41:22,598 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, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 21:41:22,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 283 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 21:41:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-04-02 21:41:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2023-04-02 21:41:22,638 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) [2023-04-02 21:41:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2023-04-02 21:41:22,647 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 35 [2023-04-02 21:41:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:41:22,647 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2023-04-02 21:41:22,647 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) [2023-04-02 21:41:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2023-04-02 21:41:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 21:41:22,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:41:22,650 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] [2023-04-02 21:41:22,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 21:41:22,650 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:41:22,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:41:22,651 INFO L85 PathProgramCache]: Analyzing trace with hash -162523397, now seen corresponding path program 1 times [2023-04-02 21:41:22,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:41:22,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536366878] [2023-04-02 21:41:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:41:22,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:41:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:41:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-02 21:41:22,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:41:22,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536366878] [2023-04-02 21:41:22,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536366878] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:41:22,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666333941] [2023-04-02 21:41:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:41:22,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:41:22,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:41:22,781 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) [2023-04-02 21:41:22,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 21:41:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:41:23,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 21:41:23,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:41:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-02 21:41:23,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 21:41:23,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666333941] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:41:23,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 21:41:23,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2023-04-02 21:41:23,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599128528] [2023-04-02 21:41:23,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:41:23,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 21:41:23,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:41:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 21:41:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 21:41:23,076 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) [2023-04-02 21:41:23,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:41:23,140 INFO L93 Difference]: Finished difference Result 232 states and 278 transitions. [2023-04-02 21:41:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 21:41:23,140 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 [2023-04-02 21:41:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:41:23,145 INFO L225 Difference]: With dead ends: 232 [2023-04-02 21:41:23,145 INFO L226 Difference]: Without dead ends: 136 [2023-04-02 21:41:23,146 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 [2023-04-02 21:41:23,147 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 [2023-04-02 21:41:23,147 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] [2023-04-02 21:41:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-04-02 21:41:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-04-02 21:41:23,165 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) [2023-04-02 21:41:23,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 161 transitions. [2023-04-02 21:41:23,166 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 161 transitions. Word has length 78 [2023-04-02 21:41:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:41:23,166 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 161 transitions. [2023-04-02 21:41:23,166 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) [2023-04-02 21:41:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 161 transitions. [2023-04-02 21:41:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-02 21:41:23,169 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:41:23,169 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] [2023-04-02 21:41:23,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 21:41:23,376 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 [2023-04-02 21:41:23,376 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:41:23,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:41:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2032890405, now seen corresponding path program 1 times [2023-04-02 21:41:23,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:41:23,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444295449] [2023-04-02 21:41:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:41:23,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:41:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:41:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 21:41:23,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:41:23,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444295449] [2023-04-02 21:41:23,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444295449] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:41:23,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042798880] [2023-04-02 21:41:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:41:23,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:41:23,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:41:23,929 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) [2023-04-02 21:41:23,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 21:41:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:41:24,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-02 21:41:24,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:41:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 21:41:24,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 21:41:24,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042798880] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:41:24,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 21:41:24,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 17 [2023-04-02 21:41:24,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910848185] [2023-04-02 21:41:24,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:41:24,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 21:41:24,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:41:24,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 21:41:24,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-04-02 21:41:24,917 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) [2023-04-02 21:41:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:41:25,829 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2023-04-02 21:41:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 21:41:25,830 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 [2023-04-02 21:41:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:41:25,832 INFO L225 Difference]: With dead ends: 304 [2023-04-02 21:41:25,835 INFO L226 Difference]: Without dead ends: 193 [2023-04-02 21:41:25,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2023-04-02 21:41:25,837 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 205 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 21:41:25,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 258 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 21:41:25,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-04-02 21:41:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 138. [2023-04-02 21:41:25,864 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) [2023-04-02 21:41:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2023-04-02 21:41:25,866 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 80 [2023-04-02 21:41:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:41:25,867 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2023-04-02 21:41:25,867 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) [2023-04-02 21:41:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2023-04-02 21:41:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-02 21:41:25,875 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:41:25,875 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] [2023-04-02 21:41:25,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:41:26,082 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 [2023-04-02 21:41:26,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:41:26,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:41:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash -2036590775, now seen corresponding path program 1 times [2023-04-02 21:41:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:41:26,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006703175] [2023-04-02 21:41:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:41:26,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:41:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:41:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 21:41:32,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:41:32,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006703175] [2023-04-02 21:41:32,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006703175] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:41:32,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881066032] [2023-04-02 21:41:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:41:32,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:41:32,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:41:32,425 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) [2023-04-02 21:41:32,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 21:41:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:41:32,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 224 conjunts are in the unsatisfiable core [2023-04-02 21:41:32,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:41:32,925 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 [2023-04-02 21:41:33,241 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 21:41:33,241 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 [2023-04-02 21:41:33,422 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 [2023-04-02 21:41:33,610 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-04-02 21:41:33,610 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 [2023-04-02 21:41:35,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:41:35,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:41:35,957 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:41:35,960 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:41:35,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:41:35,963 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 [2023-04-02 21:41:35,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:41:35,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:41:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:41:36,032 INFO L321 Elim1Store]: treesize reduction 158, result has 24.0 percent of original size [2023-04-02 21:41:36,033 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 [2023-04-02 21:41:36,059 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2023-04-02 21:41:36,060 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 [2023-04-02 21:41:36,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:41:36,076 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 [2023-04-02 21:41:36,103 INFO L321 Elim1Store]: treesize reduction 22, result has 47.6 percent of original size [2023-04-02 21:41:36,103 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 [2023-04-02 21:41:36,118 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 [2023-04-02 21:41:36,140 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2023-04-02 21:41:36,140 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 [2023-04-02 21:41:36,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:41:36,162 INFO L321 Elim1Store]: treesize reduction 8, result has 79.5 percent of original size [2023-04-02 21:41:36,163 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 [2023-04-02 21:41:36,171 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 [2023-04-02 21:41:36,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:41:36,183 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 [2023-04-02 21:41:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 21:41:37,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:41:39,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881066032] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:41:39,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447360159] [2023-04-02 21:41:39,380 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-04-02 21:41:39,380 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:41:39,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:41:39,386 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:41:39,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:41:39,439 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 29 for LOIs [2023-04-02 21:41:39,444 INFO L197 IcfgInterpreter]: Interpreting procedure foo with input of size 29 for LOIs [2023-04-02 21:41:39,738 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_initialize with input of size 14 for LOIs [2023-04-02 21:41:39,740 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 19 for LOIs [2023-04-02 21:41:39,812 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_add with input of size 38 for LOIs [2023-04-02 21:41:39,967 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 21 for LOIs [2023-04-02 21:41:40,069 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 42 for LOIs [2023-04-02 21:41:40,077 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 23 for LOIs [2023-04-02 21:41:40,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 21:41:40,229 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 57 for LOIs [2023-04-02 21:41:40,338 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 66 for LOIs [2023-04-02 21:41:40,352 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:41:46,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2998#(and (<= 1 |#StackHeapBarrier|) (= mutex_lock_~m.offset 0) (= |~#mutexes~0.base| 3) (= |mutex_lock_#in~m.offset| 0) (= |~#mutexes~0.offset| 0) (= |mutex_lock_#in~m.base| mutex_lock_~m.base) (<= (+ |mutex_lock_#in~m.base| 1) |#StackHeapBarrier|) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:41:46,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:41:46,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 21:41:46,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 68 [2023-04-02 21:41:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476542356] [2023-04-02 21:41:46,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 21:41:46,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-04-02 21:41:46,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:41:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-04-02 21:41:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=10939, Unknown=54, NotChecked=0, Total=11556 [2023-04-02 21:41:46,869 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) [2023-04-02 21:41:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:41:57,664 INFO L93 Difference]: Finished difference Result 316 states and 371 transitions. [2023-04-02 21:41:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-04-02 21:41:57,664 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 [2023-04-02 21:41:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:41:57,666 INFO L225 Difference]: With dead ends: 316 [2023-04-02 21:41:57,666 INFO L226 Difference]: Without dead ends: 214 [2023-04-02 21:41:57,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5981 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1366, Invalid=21532, Unknown=54, NotChecked=0, Total=22952 [2023-04-02 21:41:57,672 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 562 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 5404 mSolverCounterSat, 260 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 5675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 5404 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-04-02 21:41:57,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1618 Invalid, 5675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 5404 Invalid, 11 Unknown, 0 Unchecked, 5.9s Time] [2023-04-02 21:41:57,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-04-02 21:41:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 155. [2023-04-02 21:41:57,698 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) [2023-04-02 21:41:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 179 transitions. [2023-04-02 21:41:57,700 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 179 transitions. Word has length 72 [2023-04-02 21:41:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:41:57,701 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 179 transitions. [2023-04-02 21:41:57,701 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) [2023-04-02 21:41:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 179 transitions. [2023-04-02 21:41:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-02 21:41:57,702 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:41:57,702 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] [2023-04-02 21:41:57,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 21:41:57,909 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 [2023-04-02 21:41:57,909 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:41:57,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:41:57,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1903512326, now seen corresponding path program 1 times [2023-04-02 21:41:57,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:41:57,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620460932] [2023-04-02 21:41:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:41:57,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:41:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:42:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 21:42:01,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:42:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620460932] [2023-04-02 21:42:01,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620460932] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:42:01,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872670644] [2023-04-02 21:42:01,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:42:01,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:42:01,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:42:01,502 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) [2023-04-02 21:42:01,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 21:42:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:42:01,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 230 conjunts are in the unsatisfiable core [2023-04-02 21:42:01,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:42:01,915 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 [2023-04-02 21:42:02,068 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 21:42:02,068 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 [2023-04-02 21:42:02,242 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 [2023-04-02 21:42:02,299 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-02 21:42:02,299 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 [2023-04-02 21:42:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:42:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:42:04,803 INFO L321 Elim1Store]: treesize reduction 275, result has 14.1 percent of original size [2023-04-02 21:42:04,804 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 [2023-04-02 21:42:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:42:04,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:42:04,825 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 [2023-04-02 21:42:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:42:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:42:04,834 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 [2023-04-02 21:42:04,840 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 [2023-04-02 21:42:04,845 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 [2023-04-02 21:42:04,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:42:04,850 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 [2023-04-02 21:42:04,852 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 [2023-04-02 21:42:04,855 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 [2023-04-02 21:42:04,869 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 [2023-04-02 21:42:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-02 21:42:05,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:42:08,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872670644] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:42:08,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569309487] [2023-04-02 21:42:08,241 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-04-02 21:42:08,242 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:42:08,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:42:08,242 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:42:08,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:42:08,272 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 29 for LOIs [2023-04-02 21:42:08,277 INFO L197 IcfgInterpreter]: Interpreting procedure foo with input of size 29 for LOIs [2023-04-02 21:42:08,520 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_initialize with input of size 14 for LOIs [2023-04-02 21:42:08,521 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 19 for LOIs [2023-04-02 21:42:08,587 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_set_add with input of size 38 for LOIs [2023-04-02 21:42:08,756 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 21 for LOIs [2023-04-02 21:42:08,821 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 42 for LOIs [2023-04-02 21:42:08,828 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 23 for LOIs [2023-04-02 21:42:09,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 21:42:09,043 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_list_add with input of size 57 for LOIs [2023-04-02 21:42:09,172 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 66 for LOIs [2023-04-02 21:42:09,186 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:42:15,788 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4117#(and (<= 1 |#StackHeapBarrier|) (= mutex_lock_~m.offset 0) (= |~#mutexes~0.base| 3) (= |mutex_lock_#in~m.offset| 0) (= |~#mutexes~0.offset| 0) (= |mutex_lock_#in~m.base| mutex_lock_~m.base) (<= (+ |mutex_lock_#in~m.base| 1) |#StackHeapBarrier|) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 21:42:15,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:42:15,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 21:42:15,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31] total 62 [2023-04-02 21:42:15,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581020890] [2023-04-02 21:42:15,789 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 21:42:15,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-04-02 21:42:15,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:42:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-04-02 21:42:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=9696, Unknown=56, NotChecked=0, Total=10302 [2023-04-02 21:42:15,793 INFO L87 Difference]: Start difference. First operand 155 states and 179 transitions. Second operand has 62 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 50 states have internal predecessors, (74), 23 states have call successors, (35), 15 states have call predecessors, (35), 22 states have return successors, (30), 27 states have call predecessors, (30), 23 states have call successors, (30) [2023-04-02 21:42:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:42:32,036 INFO L93 Difference]: Finished difference Result 377 states and 438 transitions. [2023-04-02 21:42:32,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-04-02 21:42:32,036 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 50 states have internal predecessors, (74), 23 states have call successors, (35), 15 states have call predecessors, (35), 22 states have return successors, (30), 27 states have call predecessors, (30), 23 states have call successors, (30) Word has length 74 [2023-04-02 21:42:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:42:32,038 INFO L225 Difference]: With dead ends: 377 [2023-04-02 21:42:32,038 INFO L226 Difference]: Without dead ends: 254 [2023-04-02 21:42:32,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7229 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1976, Invalid=21526, Unknown=60, NotChecked=0, Total=23562 [2023-04-02 21:42:32,043 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1150 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 5131 mSolverCounterSat, 602 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 5765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 5131 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-04-02 21:42:32,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 1181 Invalid, 5765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 5131 Invalid, 32 Unknown, 0 Unchecked, 9.3s Time] [2023-04-02 21:42:32,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-04-02 21:42:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 150. [2023-04-02 21:42:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 91 states have internal predecessors, (103), 31 states have call successors, (31), 28 states have call predecessors, (31), 30 states have return successors, (36), 30 states have call predecessors, (36), 28 states have call successors, (36) [2023-04-02 21:42:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2023-04-02 21:42:32,071 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 74 [2023-04-02 21:42:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:42:32,072 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2023-04-02 21:42:32,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 50 states have internal predecessors, (74), 23 states have call successors, (35), 15 states have call predecessors, (35), 22 states have return successors, (30), 27 states have call predecessors, (30), 23 states have call successors, (30) [2023-04-02 21:42:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2023-04-02 21:42:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-04-02 21:42:32,073 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:42:32,073 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:42:32,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 21:42:32,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:42:32,280 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:42:32,281 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:42:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1189769078, now seen corresponding path program 1 times [2023-04-02 21:42:32,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:42:32,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642171890] [2023-04-02 21:42:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:42:32,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:42:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:42:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-04-02 21:42:32,379 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:42:32,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642171890] [2023-04-02 21:42:32,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642171890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:42:32,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:42:32,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 21:42:32,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869818998] [2023-04-02 21:42:32,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:42:32,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 21:42:32,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:42:32,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 21:42:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 21:42:32,381 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-02 21:42:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:42:32,462 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2023-04-02 21:42:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 21:42:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 97 [2023-04-02 21:42:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:42:32,464 INFO L225 Difference]: With dead ends: 160 [2023-04-02 21:42:32,464 INFO L226 Difference]: Without dead ends: 158 [2023-04-02 21:42:32,464 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 [2023-04-02 21:42:32,465 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 0 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 238 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 [2023-04-02 21:42:32,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:42:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-04-02 21:42:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2023-04-02 21:42:32,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 92 states have (on average 1.173913043478261) internal successors, (108), 95 states have internal predecessors, (108), 31 states have call successors, (31), 28 states have call predecessors, (31), 31 states have return successors, (37), 32 states have call predecessors, (37), 28 states have call successors, (37) [2023-04-02 21:42:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 176 transitions. [2023-04-02 21:42:32,493 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 176 transitions. Word has length 97 [2023-04-02 21:42:32,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:42:32,496 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 176 transitions. [2023-04-02 21:42:32,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2023-04-02 21:42:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 176 transitions. [2023-04-02 21:42:32,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-04-02 21:42:32,501 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:42:32,501 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:42:32,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 21:42:32,502 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ldv_check_final_stateErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:42:32,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:42:32,502 INFO L85 PathProgramCache]: Analyzing trace with hash -470445386, now seen corresponding path program 2 times [2023-04-02 21:42:32,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:42:32,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245319913] [2023-04-02 21:42:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:42:32,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:42:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:42:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-04-02 21:42:33,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:42:33,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245319913] [2023-04-02 21:42:33,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245319913] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:42:33,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319996453] [2023-04-02 21:42:33,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:42:33,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:42:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:42:33,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:42:33,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 21:42:34,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 21:42:34,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:42:34,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 229 conjunts are in the unsatisfiable core [2023-04-02 21:42:34,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:42:34,961 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-04-02 21:42:34,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2023-04-02 21:42:34,985 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 [2023-04-02 21:42:35,008 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 [2023-04-02 21:42:35,022 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 [2023-04-02 21:42:35,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:42:35,497 INFO L321 Elim1Store]: treesize reduction 75, result has 24.2 percent of original size [2023-04-02 21:42:35,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 496 treesize of output 552 [2023-04-02 21:42:35,514 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 129 treesize of output 127 [2023-04-02 21:42:35,522 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 127 treesize of output 125 [2023-04-02 21:42:35,553 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 5 treesize of output 3 [2023-04-02 21:42:35,751 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-02 21:42:35,752 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 108 treesize of output 11 [2023-04-02 21:42:35,756 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 5 treesize of output 3 [2023-04-02 21:42:36,804 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 30 [2023-04-02 21:42:39,920 INFO L321 Elim1Store]: treesize reduction 194, result has 38.8 percent of original size [2023-04-02 21:42:39,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 990 treesize of output 1118