./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW --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 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 --- 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-4e7fbc6 [2022-11-23 13:44:17,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:44:17,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:44:17,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:44:17,734 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:44:17,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:44:17,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:44:17,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:44:17,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:44:17,741 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:44:17,742 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:44:17,743 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:44:17,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:44:17,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:44:17,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:44:17,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:44:17,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:44:17,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:44:17,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:44:17,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:44:17,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:44:17,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:44:17,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:44:17,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:44:17,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:44:17,760 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:44:17,760 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:44:17,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:44:17,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:44:17,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:44:17,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:44:17,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:44:17,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:44:17,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:44:17,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:44:17,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:44:17,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:44:17,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:44:17,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:44:17,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:44:17,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:44:17,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 13:44:17,805 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:44:17,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:44:17,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:44:17,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:44:17,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:44:17,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:44:17,808 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:44:17,808 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:44:17,808 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:44:17,808 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:44:17,809 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:44:17,810 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:44:17,810 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:44:17,810 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:44:17,810 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:44:17,810 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:44:17,810 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:44:17,811 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:44:17,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 13:44:17,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 13:44:17,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:44:17,812 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:44:17,812 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 13:44:17,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:44:17,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:44:17,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:44:17,813 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 13:44:17,813 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 13:44:17,813 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 13:44:17,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:44:17,814 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 13:44:17,814 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:44:17,814 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:44:17,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:44:17,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:44:17,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:44:17,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:44:17,815 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:44:17,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:44:17,815 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:44:17,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:44:17,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:44:17,816 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_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 [2022-11-23 13:44:18,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:44:18,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:44:18,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:44:18,155 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:44:18,155 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:44:18,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-11-23 13:44:21,197 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:44:21,411 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:44:21,412 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-11-23 13:44:21,422 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/data/b34b375f7/1f320d3c1b6248a2afa91855b188250f/FLAG086d4245c [2022-11-23 13:44:21,436 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/data/b34b375f7/1f320d3c1b6248a2afa91855b188250f [2022-11-23 13:44:21,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:44:21,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:44:21,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:44:21,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:44:21,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:44:21,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174b7ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21, skipping insertion in model container [2022-11-23 13:44:21,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,457 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:44:21,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:44:21,734 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_e56a6a69-7412-4d26-a906-43372ec774b6/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-11-23 13:44:21,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:44:21,756 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:44:21,793 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_e56a6a69-7412-4d26-a906-43372ec774b6/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-11-23 13:44:21,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:44:21,809 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:44:21,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21 WrapperNode [2022-11-23 13:44:21,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:44:21,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:44:21,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:44:21,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:44:21,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,866 INFO L138 Inliner]: procedures = 23, calls = 176, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 392 [2022-11-23 13:44:21,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:44:21,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:44:21,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:44:21,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:44:21,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,894 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:44:21,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:44:21,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:44:21,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:44:21,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (1/1) ... [2022-11-23 13:44:21,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:44:21,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:44:21,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:44:22,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e56a6a69-7412-4d26-a906-43372ec774b6/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:44:22,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:44:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 13:44:22,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 13:44:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 13:44:22,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 13:44:22,018 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-23 13:44:22,018 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-23 13:44:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-23 13:44:22,019 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-23 13:44:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:44:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:44:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:44:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 13:44:22,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 13:44:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:44:22,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:44:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:44:22,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:44:22,022 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 13:44:22,134 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:44:22,136 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:44:22,692 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:44:22,956 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:44:22,956 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 13:44:22,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:44:22 BoogieIcfgContainer [2022-11-23 13:44:22,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:44:22,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:44:22,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:44:22,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:44:22,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:44:21" (1/3) ... [2022-11-23 13:44:22,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e3fa64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:44:22, skipping insertion in model container [2022-11-23 13:44:22,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:44:21" (2/3) ... [2022-11-23 13:44:22,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e3fa64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:44:22, skipping insertion in model container [2022-11-23 13:44:22,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:44:22" (3/3) ... [2022-11-23 13:44:22,976 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2022-11-23 13:44:22,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:44:22,999 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-23 13:44:22,999 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 13:44:23,102 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 13:44:23,153 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 13:44:23,180 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 222 transitions, 476 flow [2022-11-23 13:44:23,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 222 transitions, 476 flow [2022-11-23 13:44:23,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 222 transitions, 476 flow [2022-11-23 13:44:23,362 INFO L130 PetriNetUnfolder]: 2/218 cut-off events. [2022-11-23 13:44:23,363 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 13:44:23,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 218 events. 2/218 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 269 event pairs, 0 based on Foata normal form. 0/198 useless extension candidates. Maximal degree in co-relation 159. Up to 2 conditions per place. [2022-11-23 13:44:23,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 6800 [2022-11-23 13:44:34,671 INFO L134 LiptonReduction]: Checked pairs total: 55709 [2022-11-23 13:44:34,671 INFO L136 LiptonReduction]: Total number of compositions: 175 [2022-11-23 13:44:34,679 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 104 places, 91 transitions, 214 flow [2022-11-23 13:44:41,837 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 177303 states, 177285 states have (on average 4.36476295230843) internal successors, (773807), 177302 states have internal predecessors, (773807), 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) [2022-11-23 13:44:41,903 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:44:41,911 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;@2526edbb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:44:41,912 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-23 13:44:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand has 177303 states, 177285 states have (on average 4.36476295230843) internal successors, (773807), 177302 states have internal predecessors, (773807), 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) [2022-11-23 13:44:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-23 13:44:42,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:44:42,763 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-23 13:44:42,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 13:44:42,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:44:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1177, now seen corresponding path program 1 times [2022-11-23 13:44:42,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:44:42,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943252654] [2022-11-23 13:44:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:44:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:44:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:44:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:44:42,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:44:42,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943252654] [2022-11-23 13:44:42,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943252654] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:44:42,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:44:42,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-23 13:44:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019698347] [2022-11-23 13:44:42,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:44:42,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 13:44:42,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:44:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 13:44:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:44:43,322 INFO L87 Difference]: Start difference. First operand has 177303 states, 177285 states have (on average 4.36476295230843) internal successors, (773807), 177302 states have internal predecessors, (773807), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-23 13:44:47,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:44:47,309 INFO L93 Difference]: Finished difference Result 177300 states and 773804 transitions. [2022-11-23 13:44:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 13:44:47,312 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-11-23 13:44:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:44:49,515 INFO L225 Difference]: With dead ends: 177300 [2022-11-23 13:44:49,516 INFO L226 Difference]: Without dead ends: 177300 [2022-11-23 13:44:49,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 13:44:49,530 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:44:49,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:44:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177300 states. [2022-11-23 13:44:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177300 to 177300. [2022-11-23 13:44:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177300 states, 177285 states have (on average 4.3647460304030234) internal successors, (773804), 177299 states have internal predecessors, (773804), 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) [2022-11-23 13:45:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177300 states to 177300 states and 773804 transitions. [2022-11-23 13:45:00,305 INFO L78 Accepts]: Start accepts. Automaton has 177300 states and 773804 transitions. Word has length 1 [2022-11-23 13:45:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:45:00,306 INFO L495 AbstractCegarLoop]: Abstraction has 177300 states and 773804 transitions. [2022-11-23 13:45:00,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-23 13:45:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 177300 states and 773804 transitions. [2022-11-23 13:45:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 13:45:00,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:45:00,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 13:45:00,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:45:00,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 13:45:00,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:45:00,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1163973, now seen corresponding path program 1 times [2022-11-23 13:45:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:45:00,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209719196] [2022-11-23 13:45:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:00,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:45:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:45:00,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:45:00,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209719196] [2022-11-23 13:45:00,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209719196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:45:00,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:45:00,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 13:45:00,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569572266] [2022-11-23 13:45:00,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:45:00,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:45:00,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:45:00,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:45:00,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:45:00,790 INFO L87 Difference]: Start difference. First operand 177300 states and 773804 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-23 13:45:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:45:03,687 INFO L93 Difference]: Finished difference Result 174542 states and 763389 transitions. [2022-11-23 13:45:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:45:03,691 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-11-23 13:45:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:45:04,868 INFO L225 Difference]: With dead ends: 174542 [2022-11-23 13:45:04,868 INFO L226 Difference]: Without dead ends: 174542 [2022-11-23 13:45:04,870 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 [2022-11-23 13:45:04,871 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:45:04,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 16 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:45:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174542 states. [2022-11-23 13:45:11,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174542 to 174542. [2022-11-23 13:45:12,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174542 states, 174529 states have (on average 4.373995152668038) internal successors, (763389), 174541 states have internal predecessors, (763389), 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) [2022-11-23 13:45:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174542 states to 174542 states and 763389 transitions. [2022-11-23 13:45:13,996 INFO L78 Accepts]: Start accepts. Automaton has 174542 states and 763389 transitions. Word has length 3 [2022-11-23 13:45:13,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:45:13,996 INFO L495 AbstractCegarLoop]: Abstraction has 174542 states and 763389 transitions. [2022-11-23 13:45:13,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-23 13:45:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 174542 states and 763389 transitions. [2022-11-23 13:45:13,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 13:45:13,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:45:13,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 13:45:13,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:45:13,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-23 13:45:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:45:13,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1163974, now seen corresponding path program 1 times [2022-11-23 13:45:13,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:45:13,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576118895] [2022-11-23 13:45:13,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:13,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:45:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:45:14,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:45:14,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576118895] [2022-11-23 13:45:14,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576118895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:45:14,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:45:14,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 13:45:14,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053394468] [2022-11-23 13:45:14,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:45:14,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:45:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:45:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:45:14,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:45:14,191 INFO L87 Difference]: Start difference. First operand 174542 states and 763389 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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)