./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-deagle/reorder_c11_good-40.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-deagle/reorder_c11_good-40.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bc410c23b8a40101ed787fe72a0515ef047b7022a45484b309d3277414201100 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:58:21,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:58:21,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:58:21,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:58:21,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:58:21,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:58:21,693 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:58:21,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:58:21,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:58:21,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:58:21,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:58:21,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:58:21,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:58:21,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:58:21,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:58:21,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:58:21,704 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:58:21,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:58:21,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:58:21,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:58:21,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:58:21,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:58:21,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:58:21,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:58:21,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:58:21,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:58:21,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:58:21,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:58:21,719 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:58:21,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:58:21,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:58:21,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:58:21,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:58:21,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:58:21,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:58:21,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:58:21,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:58:21,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:58:21,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:58:21,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:58:21,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:58:21,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:58:21,769 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:58:21,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:58:21,770 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:58:21,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:58:21,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:58:21,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:58:21,772 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:58:21,772 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:58:21,772 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:58:21,772 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:58:21,773 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:58:21,773 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:58:21,774 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:58:21,774 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:58:21,774 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:58:21,774 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:58:21,774 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:58:21,775 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:58:21,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:58:21,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:58:21,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:58:21,776 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:58:21,776 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:58:21,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:58:21,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:58:21,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:58:21,777 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:58:21,777 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:58:21,777 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:58:21,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:58:21,778 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:58:21,778 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:58:21,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:58:21,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:58:21,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:58:21,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:58:21,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:58:21,779 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:58:21,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:58:21,779 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:58:21,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:58:21,780 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:58:21,780 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc410c23b8a40101ed787fe72a0515ef047b7022a45484b309d3277414201100 [2022-11-22 01:58:22,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:58:22,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:58:22,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:58:22,147 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:58:22,148 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:58:22,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/pthread-deagle/reorder_c11_good-40.i [2022-11-22 01:58:25,139 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:58:25,443 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:58:25,445 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/sv-benchmarks/c/pthread-deagle/reorder_c11_good-40.i [2022-11-22 01:58:25,463 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/data/2d18ff32c/176a5a849fa04246a704def5e5619fbb/FLAG962d16b59 [2022-11-22 01:58:25,488 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/data/2d18ff32c/176a5a849fa04246a704def5e5619fbb [2022-11-22 01:58:25,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:58:25,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:58:25,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:58:25,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:58:25,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:58:25,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:58:25" (1/1) ... [2022-11-22 01:58:25,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e38a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:25, skipping insertion in model container [2022-11-22 01:58:25,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:58:25" (1/1) ... [2022-11-22 01:58:25,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:58:25,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:58:25,968 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/sv-benchmarks/c/pthread-deagle/reorder_c11_good-40.i[30195,30208] [2022-11-22 01:58:25,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:58:25,992 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:58:26,021 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/sv-benchmarks/c/pthread-deagle/reorder_c11_good-40.i[30195,30208] [2022-11-22 01:58:26,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:58:26,073 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:58:26,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26 WrapperNode [2022-11-22 01:58:26,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:58:26,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:58:26,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:58:26,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:58:26,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,145 INFO L138 Inliner]: procedures = 163, calls = 21, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2022-11-22 01:58:26,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:58:26,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:58:26,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:58:26,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:58:26,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,188 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:58:26,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:58:26,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:58:26,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:58:26,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (1/1) ... [2022-11-22 01:58:26,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:58:26,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:26,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:58:26,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:58:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:58:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2022-11-22 01:58:26,294 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2022-11-22 01:58:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:58:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 01:58:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:58:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:58:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:58:26,295 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2022-11-22 01:58:26,295 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2022-11-22 01:58:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:58:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 01:58:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:58:26,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:58:26,298 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 01:58:26,428 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:58:26,430 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:58:26,711 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:58:26,721 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:58:26,721 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-22 01:58:26,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:58:26 BoogieIcfgContainer [2022-11-22 01:58:26,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:58:26,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:58:26,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:58:26,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:58:26,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:58:25" (1/3) ... [2022-11-22 01:58:26,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d161486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:58:26, skipping insertion in model container [2022-11-22 01:58:26,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:58:26" (2/3) ... [2022-11-22 01:58:26,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d161486 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:58:26, skipping insertion in model container [2022-11-22 01:58:26,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:58:26" (3/3) ... [2022-11-22 01:58:26,740 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_c11_good-40.i [2022-11-22 01:58:26,761 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:58:26,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-22 01:58:26,762 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 01:58:26,862 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-22 01:58:26,897 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:58:26,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-22 01:58:26,918 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 103 transitions, 228 flow [2022-11-22 01:58:26,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 103 transitions, 228 flow [2022-11-22 01:58:27,040 INFO L130 PetriNetUnfolder]: 24/243 cut-off events. [2022-11-22 01:58:27,041 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-22 01:58:27,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263 conditions, 243 events. 24/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 892 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2022-11-22 01:58:27,051 INFO L119 LiptonReduction]: Number of co-enabled transitions 1488 [2022-11-22 01:58:30,315 INFO L134 LiptonReduction]: Checked pairs total: 2068 [2022-11-22 01:58:30,315 INFO L136 LiptonReduction]: Total number of compositions: 90 [2022-11-22 01:58:30,327 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 35 transitions, 92 flow [2022-11-22 01:58:30,372 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 226 states, 166 states have (on average 2.4578313253012047) internal successors, (408), 225 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:30,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:58:30,405 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@8e158c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:58:30,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-22 01:58:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 226 states, 166 states have (on average 2.4578313253012047) internal successors, (408), 225 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:58:30,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:30,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:58:30,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:58:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash 12136, now seen corresponding path program 1 times [2022-11-22 01:58:30,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:30,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492660477] [2022-11-22 01:58:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:30,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:30,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:30,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492660477] [2022-11-22 01:58:30,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492660477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:30,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:30,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:58:30,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582969338] [2022-11-22 01:58:30,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:30,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:30,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:30,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:30,857 INFO L87 Difference]: Start difference. First operand has 226 states, 166 states have (on average 2.4578313253012047) internal successors, (408), 225 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:30,927 INFO L93 Difference]: Finished difference Result 162 states and 270 transitions. [2022-11-22 01:58:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:30,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:58:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:30,943 INFO L225 Difference]: With dead ends: 162 [2022-11-22 01:58:30,943 INFO L226 Difference]: Without dead ends: 152 [2022-11-22 01:58:30,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:30,951 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:30,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 4 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:58:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-22 01:58:31,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-11-22 01:58:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 123 states have (on average 2.065040650406504) internal successors, (254), 151 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 254 transitions. [2022-11-22 01:58:31,023 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 254 transitions. Word has length 2 [2022-11-22 01:58:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:31,024 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 254 transitions. [2022-11-22 01:58:31,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 254 transitions. [2022-11-22 01:58:31,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:58:31,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:31,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:58:31,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:58:31,029 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:58:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:31,031 INFO L85 PathProgramCache]: Analyzing trace with hash 12137, now seen corresponding path program 1 times [2022-11-22 01:58:31,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:31,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519802783] [2022-11-22 01:58:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:31,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:31,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:31,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519802783] [2022-11-22 01:58:31,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519802783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:31,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:31,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:58:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631390774] [2022-11-22 01:58:31,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:31,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:31,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:31,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:31,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:31,180 INFO L87 Difference]: Start difference. First operand 152 states and 254 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:31,240 INFO L93 Difference]: Finished difference Result 135 states and 229 transitions. [2022-11-22 01:58:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:31,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:58:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:31,245 INFO L225 Difference]: With dead ends: 135 [2022-11-22 01:58:31,246 INFO L226 Difference]: Without dead ends: 135 [2022-11-22 01:58:31,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:31,249 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:31,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 8 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:58:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-22 01:58:31,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-11-22 01:58:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 112 states have (on average 2.044642857142857) internal successors, (229), 134 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 229 transitions. [2022-11-22 01:58:31,266 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 229 transitions. Word has length 2 [2022-11-22 01:58:31,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:31,266 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 229 transitions. [2022-11-22 01:58:31,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 229 transitions. [2022-11-22 01:58:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:58:31,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:31,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:58:31,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:58:31,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:58:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash 361768838, now seen corresponding path program 1 times [2022-11-22 01:58:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:31,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19738363] [2022-11-22 01:58:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:31,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:31,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:31,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19738363] [2022-11-22 01:58:31,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19738363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:58:31,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683688059] [2022-11-22 01:58:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:31,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:31,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:31,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:31,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:58:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:31,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:58:31,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:31,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:31,821 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 9 treesize of output 11 [2022-11-22 01:58:31,828 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 10 treesize of output 8 [2022-11-22 01:58:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:31,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:31,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683688059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:58:31,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1683650425] [2022-11-22 01:58:31,932 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 01:58:31,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:58:31,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-22 01:58:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710518892] [2022-11-22 01:58:31,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:58:31,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:58:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:58:31,937 INFO L87 Difference]: Start difference. First operand 135 states and 229 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:31,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:31,957 INFO L93 Difference]: Finished difference Result 11 states and 13 transitions. [2022-11-22 01:58:31,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:58:31,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:58:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:31,959 INFO L225 Difference]: With dead ends: 11 [2022-11-22 01:58:31,959 INFO L226 Difference]: Without dead ends: 11 [2022-11-22 01:58:31,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:58:31,960 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:31,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 2 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:58:31,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-22 01:58:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-22 01:58:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-22 01:58:31,963 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2022-11-22 01:58:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:31,963 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-22 01:58:31,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-22 01:58:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:58:31,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:31,964 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-22 01:58:31,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:32,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-22 01:58:32,170 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-22 01:58:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:32,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1670067719, now seen corresponding path program 1 times [2022-11-22 01:58:32,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:32,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695506300] [2022-11-22 01:58:32,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:32,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:58:32,191 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 01:58:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:58:32,224 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 01:58:32,224 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 01:58:32,225 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2022-11-22 01:58:32,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (11 of 13 remaining) [2022-11-22 01:58:32,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-11-22 01:58:32,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-11-22 01:58:32,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-11-22 01:58:32,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-22 01:58:32,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 13 remaining) [2022-11-22 01:58:32,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2022-11-22 01:58:32,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2022-11-22 01:58:32,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 13 remaining) [2022-11-22 01:58:32,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (2 of 13 remaining) [2022-11-22 01:58:32,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 13 remaining) [2022-11-22 01:58:32,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-22 01:58:32,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:58:32,236 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-22 01:58:32,238 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-22 01:58:32,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-22 01:58:32,274 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-22 01:58:32,282 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:58:32,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-22 01:58:32,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 122 transitions, 292 flow [2022-11-22 01:58:32,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 122 transitions, 292 flow [2022-11-22 01:58:32,477 INFO L130 PetriNetUnfolder]: 107/793 cut-off events. [2022-11-22 01:58:32,478 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-22 01:58:32,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 793 events. 107/793 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4312 event pairs, 2 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 468. Up to 32 conditions per place. [2022-11-22 01:58:32,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 3568 [2022-11-22 01:58:35,354 INFO L134 LiptonReduction]: Checked pairs total: 5574 [2022-11-22 01:58:35,354 INFO L136 LiptonReduction]: Total number of compositions: 99 [2022-11-22 01:58:35,355 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 46 transitions, 140 flow [2022-11-22 01:58:35,475 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2511 states, 2227 states have (on average 3.0933991917377637) internal successors, (6889), 2510 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:35,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:58:35,477 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@8e158c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:58:35,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-22 01:58:35,485 INFO L276 IsEmpty]: Start isEmpty. Operand has 2511 states, 2227 states have (on average 3.0933991917377637) internal successors, (6889), 2510 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:35,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:58:35,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:35,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:58:35,486 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-22 01:58:35,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:35,487 INFO L85 PathProgramCache]: Analyzing trace with hash 19768, now seen corresponding path program 1 times [2022-11-22 01:58:35,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:35,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813417995] [2022-11-22 01:58:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:35,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:35,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:35,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813417995] [2022-11-22 01:58:35,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813417995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:35,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:35,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:58:35,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461919060] [2022-11-22 01:58:35,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:35,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:35,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:35,553 INFO L87 Difference]: Start difference. First operand has 2511 states, 2227 states have (on average 3.0933991917377637) internal successors, (6889), 2510 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:35,646 INFO L93 Difference]: Finished difference Result 1334 states and 3256 transitions. [2022-11-22 01:58:35,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:35,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:58:35,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:35,656 INFO L225 Difference]: With dead ends: 1334 [2022-11-22 01:58:35,657 INFO L226 Difference]: Without dead ends: 1252 [2022-11-22 01:58:35,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:35,658 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:35,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:35,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-11-22 01:58:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1252. [2022-11-22 01:58:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1163 states have (on average 2.6362854686156494) internal successors, (3066), 1251 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 3066 transitions. [2022-11-22 01:58:35,727 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 3066 transitions. Word has length 2 [2022-11-22 01:58:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:35,727 INFO L495 AbstractCegarLoop]: Abstraction has 1252 states and 3066 transitions. [2022-11-22 01:58:35,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 3066 transitions. [2022-11-22 01:58:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:58:35,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:35,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:58:35,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:58:35,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-22 01:58:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:35,729 INFO L85 PathProgramCache]: Analyzing trace with hash 19769, now seen corresponding path program 1 times [2022-11-22 01:58:35,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:35,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444057453] [2022-11-22 01:58:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:35,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:35,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:35,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444057453] [2022-11-22 01:58:35,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444057453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:35,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:35,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:58:35,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382208823] [2022-11-22 01:58:35,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:35,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:35,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:35,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:35,804 INFO L87 Difference]: Start difference. First operand 1252 states and 3066 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:35,893 INFO L93 Difference]: Finished difference Result 1207 states and 2983 transitions. [2022-11-22 01:58:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:35,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:58:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:35,902 INFO L225 Difference]: With dead ends: 1207 [2022-11-22 01:58:35,902 INFO L226 Difference]: Without dead ends: 1207 [2022-11-22 01:58:35,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:35,904 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:35,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-11-22 01:58:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1207. [2022-11-22 01:58:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1126 states have (on average 2.649200710479574) internal successors, (2983), 1206 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2983 transitions. [2022-11-22 01:58:35,986 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2983 transitions. Word has length 2 [2022-11-22 01:58:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:35,986 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 2983 transitions. [2022-11-22 01:58:35,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2983 transitions. [2022-11-22 01:58:35,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:58:35,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:35,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:58:35,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:58:35,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-22 01:58:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1089999500, now seen corresponding path program 1 times [2022-11-22 01:58:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:35,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505620099] [2022-11-22 01:58:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:35,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:36,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:36,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505620099] [2022-11-22 01:58:36,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505620099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:58:36,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621446198] [2022-11-22 01:58:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:36,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:36,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:36,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:36,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:58:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:36,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:58:36,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:36,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:36,253 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 9 treesize of output 11 [2022-11-22 01:58:36,266 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 10 treesize of output 8 [2022-11-22 01:58:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:36,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:36,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621446198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:58:36,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625775542] [2022-11-22 01:58:36,380 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 01:58:36,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:58:36,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-22 01:58:36,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361227648] [2022-11-22 01:58:36,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:36,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:58:36,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:58:36,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:58:36,387 INFO L87 Difference]: Start difference. First operand 1207 states and 2983 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:36,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:36,563 INFO L93 Difference]: Finished difference Result 1113 states and 2764 transitions. [2022-11-22 01:58:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:58:36,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:58:36,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:36,570 INFO L225 Difference]: With dead ends: 1113 [2022-11-22 01:58:36,571 INFO L226 Difference]: Without dead ends: 1113 [2022-11-22 01:58:36,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:58:36,575 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:36,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-11-22 01:58:36,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1113. [2022-11-22 01:58:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1041 states have (on average 2.655139289145053) internal successors, (2764), 1112 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:36,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2764 transitions. [2022-11-22 01:58:36,616 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2764 transitions. Word has length 6 [2022-11-22 01:58:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:36,616 INFO L495 AbstractCegarLoop]: Abstraction has 1113 states and 2764 transitions. [2022-11-22 01:58:36,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:36,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2764 transitions. [2022-11-22 01:58:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:58:36,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:36,617 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-22 01:58:36,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:36,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:58:36,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-22 01:58:36,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:36,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1473638048, now seen corresponding path program 1 times [2022-11-22 01:58:36,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:36,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669583299] [2022-11-22 01:58:36,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:36,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:58:36,838 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 01:58:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:58:36,849 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 01:58:36,850 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 01:58:36,850 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 14 remaining) [2022-11-22 01:58:36,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (12 of 14 remaining) [2022-11-22 01:58:36,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2022-11-22 01:58:36,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2022-11-22 01:58:36,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2022-11-22 01:58:36,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2022-11-22 01:58:36,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2022-11-22 01:58:36,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2022-11-22 01:58:36,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2022-11-22 01:58:36,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2022-11-22 01:58:36,851 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (3 of 14 remaining) [2022-11-22 01:58:36,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 14 remaining) [2022-11-22 01:58:36,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2022-11-22 01:58:36,852 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2022-11-22 01:58:36,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:58:36,852 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-22 01:58:36,853 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-22 01:58:36,853 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-22 01:58:36,899 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-11-22 01:58:36,903 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:58:36,904 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-22 01:58:36,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 141 transitions, 360 flow [2022-11-22 01:58:36,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 141 transitions, 360 flow [2022-11-22 01:58:37,341 INFO L130 PetriNetUnfolder]: 496/2769 cut-off events. [2022-11-22 01:58:37,341 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-11-22 01:58:37,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3220 conditions, 2769 events. 496/2769 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 20326 event pairs, 64 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 1654. Up to 192 conditions per place. [2022-11-22 01:58:37,404 INFO L119 LiptonReduction]: Number of co-enabled transitions 6240 [2022-11-22 01:58:40,331 INFO L134 LiptonReduction]: Checked pairs total: 9669 [2022-11-22 01:58:40,331 INFO L136 LiptonReduction]: Total number of compositions: 115 [2022-11-22 01:58:40,332 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 55 transitions, 188 flow [2022-11-22 01:58:41,653 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27399 states, 25927 states have (on average 3.8926987310525707) internal successors, (100926), 27398 states have internal predecessors, (100926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:41,654 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:58:41,655 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@8e158c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:58:41,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-22 01:58:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 27399 states, 25927 states have (on average 3.8926987310525707) internal successors, (100926), 27398 states have internal predecessors, (100926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:58:41,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:41,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:58:41,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-22 01:58:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash 28502, now seen corresponding path program 1 times [2022-11-22 01:58:41,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:41,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990908416] [2022-11-22 01:58:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:41,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:41,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:41,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990908416] [2022-11-22 01:58:41,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990908416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:41,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:41,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:58:41,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184227819] [2022-11-22 01:58:41,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:41,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:41,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:41,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:41,810 INFO L87 Difference]: Start difference. First operand has 27399 states, 25927 states have (on average 3.8926987310525707) internal successors, (100926), 27398 states have internal predecessors, (100926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:42,162 INFO L93 Difference]: Finished difference Result 10742 states and 34666 transitions. [2022-11-22 01:58:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:42,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:58:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:42,241 INFO L225 Difference]: With dead ends: 10742 [2022-11-22 01:58:42,241 INFO L226 Difference]: Without dead ends: 10012 [2022-11-22 01:58:42,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:42,242 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:42,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10012 states. [2022-11-22 01:58:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10012 to 10012. [2022-11-22 01:58:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10012 states, 9715 states have (on average 3.3430777148739064) internal successors, (32478), 10011 states have internal predecessors, (32478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10012 states to 10012 states and 32478 transitions. [2022-11-22 01:58:42,807 INFO L78 Accepts]: Start accepts. Automaton has 10012 states and 32478 transitions. Word has length 2 [2022-11-22 01:58:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:42,807 INFO L495 AbstractCegarLoop]: Abstraction has 10012 states and 32478 transitions. [2022-11-22 01:58:42,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:42,807 INFO L276 IsEmpty]: Start isEmpty. Operand 10012 states and 32478 transitions. [2022-11-22 01:58:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:58:42,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:42,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:58:42,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:58:42,808 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-22 01:58:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:42,809 INFO L85 PathProgramCache]: Analyzing trace with hash 28503, now seen corresponding path program 1 times [2022-11-22 01:58:42,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:42,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775066650] [2022-11-22 01:58:42,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:42,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:42,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:42,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:42,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775066650] [2022-11-22 01:58:42,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775066650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:58:42,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:58:42,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:58:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679581938] [2022-11-22 01:58:42,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:58:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:58:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:58:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:42,898 INFO L87 Difference]: Start difference. First operand 10012 states and 32478 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:43,234 INFO L93 Difference]: Finished difference Result 9915 states and 32259 transitions. [2022-11-22 01:58:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:58:43,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:58:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:43,383 INFO L225 Difference]: With dead ends: 9915 [2022-11-22 01:58:43,406 INFO L226 Difference]: Without dead ends: 9915 [2022-11-22 01:58:43,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:58:43,408 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:43,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9915 states. [2022-11-22 01:58:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9915 to 9915. [2022-11-22 01:58:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9915 states, 9628 states have (on average 3.350540091400083) internal successors, (32259), 9914 states have internal predecessors, (32259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9915 states to 9915 states and 32259 transitions. [2022-11-22 01:58:44,055 INFO L78 Accepts]: Start accepts. Automaton has 9915 states and 32259 transitions. Word has length 2 [2022-11-22 01:58:44,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:44,055 INFO L495 AbstractCegarLoop]: Abstraction has 9915 states and 32259 transitions. [2022-11-22 01:58:44,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 9915 states and 32259 transitions. [2022-11-22 01:58:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:58:44,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:44,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:58:44,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:58:44,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-22 01:58:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:44,058 INFO L85 PathProgramCache]: Analyzing trace with hash 573811912, now seen corresponding path program 1 times [2022-11-22 01:58:44,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:44,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68937444] [2022-11-22 01:58:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:44,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:44,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:44,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68937444] [2022-11-22 01:58:44,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68937444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:58:44,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885466761] [2022-11-22 01:58:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:44,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:44,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:44,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:44,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:58:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:58:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:44,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:44,290 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 9 treesize of output 11 [2022-11-22 01:58:44,304 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 18 treesize of output 16 [2022-11-22 01:58:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:44,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:44,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885466761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:58:44,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [629148186] [2022-11-22 01:58:44,404 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 01:58:44,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:58:44,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-22 01:58:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767286667] [2022-11-22 01:58:44,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:44,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:58:44,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:44,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:58:44,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:58:44,407 INFO L87 Difference]: Start difference. First operand 9915 states and 32259 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:44,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:44,767 INFO L93 Difference]: Finished difference Result 9709 states and 31696 transitions. [2022-11-22 01:58:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:58:44,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:58:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:44,905 INFO L225 Difference]: With dead ends: 9709 [2022-11-22 01:58:44,906 INFO L226 Difference]: Without dead ends: 9709 [2022-11-22 01:58:44,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:58:44,907 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:44,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 23 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:58:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9709 states. [2022-11-22 01:58:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9709 to 9709. [2022-11-22 01:58:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9709 states, 9434 states have (on average 3.3597625609497563) internal successors, (31696), 9708 states have internal predecessors, (31696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9709 states to 9709 states and 31696 transitions. [2022-11-22 01:58:45,324 INFO L78 Accepts]: Start accepts. Automaton has 9709 states and 31696 transitions. Word has length 6 [2022-11-22 01:58:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:45,325 INFO L495 AbstractCegarLoop]: Abstraction has 9709 states and 31696 transitions. [2022-11-22 01:58:45,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 9709 states and 31696 transitions. [2022-11-22 01:58:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:58:45,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:45,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 01:58:45,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:45,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 01:58:45,532 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-22 01:58:45,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:45,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1114538612, now seen corresponding path program 1 times [2022-11-22 01:58:45,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:45,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213494648] [2022-11-22 01:58:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:45,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:45,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:45,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213494648] [2022-11-22 01:58:45,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213494648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:58:45,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956234908] [2022-11-22 01:58:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:45,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:45,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:45,592 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:45,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:58:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:45,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:58:45,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:45,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:45,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956234908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:58:45,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1651138083] [2022-11-22 01:58:45,746 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 01:58:45,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:58:45,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-22 01:58:45,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184489698] [2022-11-22 01:58:45,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:45,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:58:45,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:45,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:58:45,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:58:45,749 INFO L87 Difference]: Start difference. First operand 9709 states and 31696 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:45,782 INFO L93 Difference]: Finished difference Result 67 states and 139 transitions. [2022-11-22 01:58:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:58:45,783 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:58:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:45,783 INFO L225 Difference]: With dead ends: 67 [2022-11-22 01:58:45,783 INFO L226 Difference]: Without dead ends: 67 [2022-11-22 01:58:45,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:58:45,785 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:45,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 7 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:58:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-22 01:58:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-22 01:58:45,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.106060606060606) internal successors, (139), 66 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 139 transitions. [2022-11-22 01:58:45,788 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 139 transitions. Word has length 11 [2022-11-22 01:58:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:45,789 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 139 transitions. [2022-11-22 01:58:45,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 139 transitions. [2022-11-22 01:58:45,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:58:45,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:45,790 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-22 01:58:45,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:45,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 01:58:45,997 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-22 01:58:45,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:45,998 INFO L85 PathProgramCache]: Analyzing trace with hash -766681166, now seen corresponding path program 1 times [2022-11-22 01:58:45,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:45,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531598447] [2022-11-22 01:58:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:45,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:58:46,030 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 01:58:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:58:46,054 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 01:58:46,054 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 01:58:46,054 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2022-11-22 01:58:46,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2022-11-22 01:58:46,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2022-11-22 01:58:46,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2022-11-22 01:58:46,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2022-11-22 01:58:46,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2022-11-22 01:58:46,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2022-11-22 01:58:46,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2022-11-22 01:58:46,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2022-11-22 01:58:46,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2022-11-22 01:58:46,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (4 of 15 remaining) [2022-11-22 01:58:46,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 15 remaining) [2022-11-22 01:58:46,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2022-11-22 01:58:46,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2022-11-22 01:58:46,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2022-11-22 01:58:46,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:58:46,058 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-22 01:58:46,059 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-22 01:58:46,059 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-22 01:58:46,102 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2022-11-22 01:58:46,106 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:58:46,106 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 160 transitions, 432 flow [2022-11-22 01:58:46,107 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 160 transitions, 432 flow [2022-11-22 01:58:46,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 160 transitions, 432 flow [2022-11-22 01:58:48,004 INFO L130 PetriNetUnfolder]: 2379/10599 cut-off events. [2022-11-22 01:58:48,004 INFO L131 PetriNetUnfolder]: For 2144/2144 co-relation queries the response was YES. [2022-11-22 01:58:48,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12764 conditions, 10599 events. 2379/10599 cut-off events. For 2144/2144 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 100898 event pairs, 626 based on Foata normal form. 0/8135 useless extension candidates. Maximal degree in co-relation 6333. Up to 1024 conditions per place. [2022-11-22 01:58:48,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 9504 [2022-11-22 01:58:51,796 INFO L134 LiptonReduction]: Checked pairs total: 16158 [2022-11-22 01:58:51,797 INFO L136 LiptonReduction]: Total number of compositions: 129 [2022-11-22 01:58:51,798 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 64 transitions, 240 flow [2022-11-22 01:59:04,308 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 310275 states, 302067 states have (on average 4.735177957208169) internal successors, (1430341), 310274 states have internal predecessors, (1430341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:04,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:59:04,331 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@8e158c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:59:04,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-11-22 01:59:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 310275 states, 302067 states have (on average 4.735177957208169) internal successors, (1430341), 310274 states have internal predecessors, (1430341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:59:04,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:04,680 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:59:04,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-22 01:59:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:04,681 INFO L85 PathProgramCache]: Analyzing trace with hash 38292, now seen corresponding path program 1 times [2022-11-22 01:59:04,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:04,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631923721] [2022-11-22 01:59:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:04,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:04,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:04,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631923721] [2022-11-22 01:59:04,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631923721] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:04,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:04,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:59:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134475050] [2022-11-22 01:59:04,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:04,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:04,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:04,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:05,101 INFO L87 Difference]: Start difference. First operand has 310275 states, 302067 states have (on average 4.735177957208169) internal successors, (1430341), 310274 states have internal predecessors, (1430341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:07,220 INFO L93 Difference]: Finished difference Result 90638 states and 363084 transitions. [2022-11-22 01:59:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:59:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:08,884 INFO L225 Difference]: With dead ends: 90638 [2022-11-22 01:59:08,884 INFO L226 Difference]: Without dead ends: 84076 [2022-11-22 01:59:08,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:08,886 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:08,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:59:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84076 states. [2022-11-22 01:59:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84076 to 84076. [2022-11-22 01:59:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84076 states, 82991 states have (on average 4.085093564362401) internal successors, (339026), 84075 states have internal predecessors, (339026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84076 states to 84076 states and 339026 transitions. [2022-11-22 01:59:12,575 INFO L78 Accepts]: Start accepts. Automaton has 84076 states and 339026 transitions. Word has length 2 [2022-11-22 01:59:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:12,575 INFO L495 AbstractCegarLoop]: Abstraction has 84076 states and 339026 transitions. [2022-11-22 01:59:12,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 84076 states and 339026 transitions. [2022-11-22 01:59:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:59:12,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:12,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:59:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 01:59:12,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-22 01:59:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 38293, now seen corresponding path program 1 times [2022-11-22 01:59:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:12,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817487796] [2022-11-22 01:59:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:12,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:12,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817487796] [2022-11-22 01:59:12,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817487796] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:12,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:12,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:59:12,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568281813] [2022-11-22 01:59:12,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:12,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:12,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:12,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:12,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:12,647 INFO L87 Difference]: Start difference. First operand 84076 states and 339026 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:14,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:14,133 INFO L93 Difference]: Finished difference Result 83875 states and 338483 transitions. [2022-11-22 01:59:14,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:14,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:59:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:14,824 INFO L225 Difference]: With dead ends: 83875 [2022-11-22 01:59:14,824 INFO L226 Difference]: Without dead ends: 83875 [2022-11-22 01:59:14,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:14,825 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:14,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:59:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83875 states. [2022-11-22 01:59:17,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83875 to 83875. [2022-11-22 01:59:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83875 states, 82802 states have (on average 4.087860196613608) internal successors, (338483), 83874 states have internal predecessors, (338483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83875 states to 83875 states and 338483 transitions. [2022-11-22 01:59:18,331 INFO L78 Accepts]: Start accepts. Automaton has 83875 states and 338483 transitions. Word has length 2 [2022-11-22 01:59:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:18,332 INFO L495 AbstractCegarLoop]: Abstraction has 83875 states and 338483 transitions. [2022-11-22 01:59:18,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 83875 states and 338483 transitions. [2022-11-22 01:59:18,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:59:18,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:18,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:59:18,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-22 01:59:18,333 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-22 01:59:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1033940465, now seen corresponding path program 1 times [2022-11-22 01:59:18,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:18,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612356887] [2022-11-22 01:59:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:18,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:18,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:18,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612356887] [2022-11-22 01:59:18,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612356887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:18,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785635609] [2022-11-22 01:59:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:18,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:18,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:18,418 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:18,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:59:18,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:18,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:59:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:18,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:18,538 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 9 treesize of output 11 [2022-11-22 01:59:18,546 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 10 treesize of output 8 [2022-11-22 01:59:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:18,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:18,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785635609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:18,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1718572262] [2022-11-22 01:59:18,643 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 01:59:18,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:18,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-22 01:59:18,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404826231] [2022-11-22 01:59:18,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:18,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:59:18,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:18,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:59:18,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:59:18,647 INFO L87 Difference]: Start difference. First operand 83875 states and 338483 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:20,158 INFO L93 Difference]: Finished difference Result 83461 states and 337168 transitions. [2022-11-22 01:59:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:59:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:59:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:20,612 INFO L225 Difference]: With dead ends: 83461 [2022-11-22 01:59:20,612 INFO L226 Difference]: Without dead ends: 83461 [2022-11-22 01:59:20,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:59:20,613 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 55 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:20,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 18 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:59:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83461 states. [2022-11-22 01:59:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83461 to 83461. [2022-11-22 01:59:23,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83461 states, 82402 states have (on average 4.091745345986748) internal successors, (337168), 83460 states have internal predecessors, (337168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83461 states to 83461 states and 337168 transitions. [2022-11-22 01:59:24,465 INFO L78 Accepts]: Start accepts. Automaton has 83461 states and 337168 transitions. Word has length 6 [2022-11-22 01:59:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:24,465 INFO L495 AbstractCegarLoop]: Abstraction has 83461 states and 337168 transitions. [2022-11-22 01:59:24,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand 83461 states and 337168 transitions. [2022-11-22 01:59:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:59:24,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:24,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 01:59:24,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:24,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:24,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-22 01:59:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:24,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1311762098, now seen corresponding path program 1 times [2022-11-22 01:59:24,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:24,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045088057] [2022-11-22 01:59:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:24,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:59:24,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:24,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045088057] [2022-11-22 01:59:24,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045088057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:24,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:24,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:59:24,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580255249] [2022-11-22 01:59:24,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:24,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:24,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:24,707 INFO L87 Difference]: Start difference. First operand 83461 states and 337168 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:25,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:25,417 INFO L93 Difference]: Finished difference Result 76032 states and 309383 transitions. [2022-11-22 01:59:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:25,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:59:25,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:26,780 INFO L225 Difference]: With dead ends: 76032 [2022-11-22 01:59:26,780 INFO L226 Difference]: Without dead ends: 76032 [2022-11-22 01:59:26,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:26,782 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:26,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:59:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76032 states. [2022-11-22 01:59:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76032 to 76032. [2022-11-22 01:59:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76032 states, 75244 states have (on average 4.111729838924034) internal successors, (309383), 76031 states have internal predecessors, (309383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76032 states to 76032 states and 309383 transitions. [2022-11-22 01:59:29,177 INFO L78 Accepts]: Start accepts. Automaton has 76032 states and 309383 transitions. Word has length 11 [2022-11-22 01:59:29,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:29,178 INFO L495 AbstractCegarLoop]: Abstraction has 76032 states and 309383 transitions. [2022-11-22 01:59:29,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 76032 states and 309383 transitions. [2022-11-22 01:59:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:59:29,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:29,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 01:59:29,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 01:59:29,179 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-22 01:59:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:29,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1311762100, now seen corresponding path program 1 times [2022-11-22 01:59:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:29,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516414364] [2022-11-22 01:59:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:29,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:29,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:29,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516414364] [2022-11-22 01:59:29,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516414364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:29,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797390116] [2022-11-22 01:59:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:29,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:29,251 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:29,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:59:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:29,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:59:29,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:29,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:29,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797390116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1121306233] [2022-11-22 01:59:29,412 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 01:59:29,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:29,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-22 01:59:29,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642844762] [2022-11-22 01:59:29,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:29,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:59:29,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:29,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:59:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:59:29,415 INFO L87 Difference]: Start difference. First operand 76032 states and 309383 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:29,467 INFO L93 Difference]: Finished difference Result 155 states and 399 transitions. [2022-11-22 01:59:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:59:29,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:59:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:29,468 INFO L225 Difference]: With dead ends: 155 [2022-11-22 01:59:29,468 INFO L226 Difference]: Without dead ends: 155 [2022-11-22 01:59:29,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:59:29,471 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:29,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 8 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:59:29,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-22 01:59:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-11-22 01:59:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 2.607843137254902) internal successors, (399), 154 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 399 transitions. [2022-11-22 01:59:29,476 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 399 transitions. Word has length 11 [2022-11-22 01:59:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:29,476 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 399 transitions. [2022-11-22 01:59:29,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 399 transitions. [2022-11-22 01:59:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:59:29,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:29,481 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:29,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:29,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:59:29,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-22 01:59:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash -135463105, now seen corresponding path program 1 times [2022-11-22 01:59:29,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:29,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524493312] [2022-11-22 01:59:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:29,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:29,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:59:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524493312] [2022-11-22 01:59:29,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524493312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:59:29,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595972620] [2022-11-22 01:59:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:29,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:29,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:29,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:29,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:59:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:30,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:59:30,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:30,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:30,050 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 9 treesize of output 11 [2022-11-22 01:59:30,056 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 10 treesize of output 8 [2022-11-22 01:59:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:30,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:59:30,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595972620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:30,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [773357589] [2022-11-22 01:59:30,438 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 01:59:30,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:59:30,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-22 01:59:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65563072] [2022-11-22 01:59:30,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:30,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:59:30,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:59:30,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:59:30,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:59:30,441 INFO L87 Difference]: Start difference. First operand 155 states and 399 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:30,729 INFO L93 Difference]: Finished difference Result 139 states and 351 transitions. [2022-11-22 01:59:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:59:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-22 01:59:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:30,731 INFO L225 Difference]: With dead ends: 139 [2022-11-22 01:59:30,731 INFO L226 Difference]: Without dead ends: 139 [2022-11-22 01:59:30,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:59:30,733 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 71 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:30,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 45 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:59:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-22 01:59:30,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-11-22 01:59:30,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.5434782608695654) internal successors, (351), 138 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 351 transitions. [2022-11-22 01:59:30,739 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 351 transitions. Word has length 18 [2022-11-22 01:59:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:30,740 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 351 transitions. [2022-11-22 01:59:30,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 351 transitions. [2022-11-22 01:59:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:59:30,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:30,741 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:30,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:30,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8bb7deeb-e23c-4b81-a281-9ee781a5e1eb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:30,947 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-11-22 01:59:30,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash 95611992, now seen corresponding path program 1 times [2022-11-22 01:59:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:59:30,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473410385] [2022-11-22 01:59:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:30,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:59:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:59:30,962 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 01:59:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 01:59:30,979 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 01:59:30,979 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 01:59:30,979 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2022-11-22 01:59:30,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (14 of 16 remaining) [2022-11-22 01:59:30,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2022-11-22 01:59:30,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2022-11-22 01:59:30,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2022-11-22 01:59:30,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2022-11-22 01:59:30,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2022-11-22 01:59:30,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2022-11-22 01:59:30,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2022-11-22 01:59:30,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2022-11-22 01:59:30,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (5 of 16 remaining) [2022-11-22 01:59:30,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 16 remaining) [2022-11-22 01:59:30,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2022-11-22 01:59:30,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2022-11-22 01:59:30,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 16 remaining) [2022-11-22 01:59:30,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2022-11-22 01:59:30,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-22 01:59:30,983 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:30,984 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-22 01:59:30,984 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-22 01:59:31,014 INFO L144 ThreadInstanceAdder]: Constructed 20 joinOtherThreadTransitions. [2022-11-22 01:59:31,017 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:59:31,017 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 179 transitions, 508 flow [2022-11-22 01:59:31,018 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 179 transitions, 508 flow [2022-11-22 01:59:31,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 508 flow