./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 8393723b 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_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS --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-8393723 [2022-11-19 07:25:44,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:25:44,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:25:44,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:25:44,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:25:44,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:25:44,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:25:44,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:25:44,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:25:44,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:25:44,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:25:44,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:25:44,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:25:44,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:25:44,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:25:44,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:25:44,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:25:44,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:25:44,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:25:44,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:25:44,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:25:44,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:25:44,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:25:44,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:25:44,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:25:44,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:25:44,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:25:44,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:25:44,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:25:44,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:25:44,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:25:44,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:25:44,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:25:44,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:25:44,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:25:44,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:25:44,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:25:44,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:25:44,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:25:44,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:25:44,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:25:44,859 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:25:44,901 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:25:44,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:25:44,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:25:44,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:25:44,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:25:44,903 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:25:44,904 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:25:44,904 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:25:44,904 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:25:44,904 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:25:44,905 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:25:44,905 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:25:44,906 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:25:44,906 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:25:44,906 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:25:44,906 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:25:44,907 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:25:44,907 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:25:44,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:25:44,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:25:44,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:25:44,908 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:25:44,908 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:25:44,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:25:44,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:25:44,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:25:44,910 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:25:44,911 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:25:44,911 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:25:44,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:25:44,911 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:25:44,912 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:25:44,912 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:25:44,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:25:44,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:25:44,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:44,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:25:44,913 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:25:44,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:25:44,913 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:25:44,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:25:44,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:25:44,914 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_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39dcc47a23129180b44ef3e235976e9c499f5290fa3f0e6dd106879ae94f5ae2 [2022-11-19 07:25:45,169 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:25:45,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:25:45,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:25:45,195 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:25:45,196 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:25:45,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-11-19 07:25:45,276 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/data/3d5b70275/0c58271b8cb449a68ac165335e1ab22e/FLAG47f0c8daa [2022-11-19 07:25:45,759 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:25:45,767 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c [2022-11-19 07:25:45,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/data/3d5b70275/0c58271b8cb449a68ac165335e1ab22e/FLAG47f0c8daa [2022-11-19 07:25:46,118 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/data/3d5b70275/0c58271b8cb449a68ac165335e1ab22e [2022-11-19 07:25:46,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:25:46,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:25:46,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:46,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:25:46,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:25:46,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1386454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46, skipping insertion in model container [2022-11-19 07:25:46,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:25:46,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:25:46,450 WARN L234 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_487eab67-143f-4aa9-96d6-d3781dd08a5b/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-11-19 07:25:46,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:46,464 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:25:46,505 WARN L234 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_487eab67-143f-4aa9-96d6-d3781dd08a5b/sv-benchmarks/c/weaver/parallel-bakery-4.wvr.c[7978,7991] [2022-11-19 07:25:46,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:25:46,521 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:25:46,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46 WrapperNode [2022-11-19 07:25:46,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:25:46,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:46,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:25:46,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:25:46,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,589 INFO L138 Inliner]: procedures = 23, calls = 176, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 392 [2022-11-19 07:25:46,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:25:46,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:25:46,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:25:46,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:25:46,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,650 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:25:46,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:25:46,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:25:46,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:25:46,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (1/1) ... [2022-11-19 07:25:46,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:25:46,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:25:46,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:25:46,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_487eab67-143f-4aa9-96d6-d3781dd08a5b/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:25:46,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:25:46,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 07:25:46,751 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 07:25:46,751 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 07:25:46,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 07:25:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 07:25:46,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 07:25:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-19 07:25:46,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-19 07:25:46,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:25:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:25:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:25:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 07:25:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 07:25:46,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:25:46,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:25:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:25:46,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:25:46,756 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:25:46,867 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:25:46,869 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:25:47,446 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:25:47,722 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:25:47,722 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:25:47,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:25:47 BoogieIcfgContainer [2022-11-19 07:25:47,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:25:47,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:25:47,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:25:47,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:25:47,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:25:46" (1/3) ... [2022-11-19 07:25:47,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9721ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:25:47, skipping insertion in model container [2022-11-19 07:25:47,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:25:46" (2/3) ... [2022-11-19 07:25:47,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9721ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:25:47, skipping insertion in model container [2022-11-19 07:25:47,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:25:47" (3/3) ... [2022-11-19 07:25:47,738 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2022-11-19 07:25:47,760 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:25:47,760 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2022-11-19 07:25:47,760 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:25:47,869 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-19 07:25:47,914 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:25:47,930 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 233 places, 222 transitions, 476 flow [2022-11-19 07:25:47,941 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 233 places, 222 transitions, 476 flow [2022-11-19 07:25:47,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 222 transitions, 476 flow [2022-11-19 07:25:48,094 INFO L130 PetriNetUnfolder]: 2/218 cut-off events. [2022-11-19 07:25:48,094 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-19 07:25:48,098 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 270 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. [2022-11-19 07:25:48,104 INFO L119 LiptonReduction]: Number of co-enabled transitions 6800 [2022-11-19 07:25:57,844 INFO L134 LiptonReduction]: Checked pairs total: 67237 [2022-11-19 07:25:57,845 INFO L136 LiptonReduction]: Total number of compositions: 175 [2022-11-19 07:25:57,853 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 104 places, 91 transitions, 214 flow [2022-11-19 07:26:05,708 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) [2022-11-19 07:26:05,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:26:05,783 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;@3ef73ea3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:26:05,784 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-19 07:26:06,156 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) [2022-11-19 07:26:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-19 07:26:06,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:06,161 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-19 07:26:06,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-19 07:26:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1178, now seen corresponding path program 1 times [2022-11-19 07:26:06,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:06,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968171853] [2022-11-19 07:26:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:06,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:06,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968171853] [2022-11-19 07:26:06,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968171853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:06,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:06,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-19 07:26:06,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324535637] [2022-11-19 07:26:06,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:06,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:26:06,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:06,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:26:06,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:26:06,636 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) [2022-11-19 07:26:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:10,817 INFO L93 Difference]: Finished difference Result 177300 states and 773804 transitions. [2022-11-19 07:26:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:26:10,820 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 [2022-11-19 07:26:10,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:12,711 INFO L225 Difference]: With dead ends: 177300 [2022-11-19 07:26:12,711 INFO L226 Difference]: Without dead ends: 177300 [2022-11-19 07:26:12,712 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 [2022-11-19 07:26:12,715 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:26:12,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:26:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177300 states. [2022-11-19 07:26:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177300 to 177300. [2022-11-19 07:26:21,354 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) [2022-11-19 07:26:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177300 states to 177300 states and 773804 transitions. [2022-11-19 07:26:23,360 INFO L78 Accepts]: Start accepts. Automaton has 177300 states and 773804 transitions. Word has length 1 [2022-11-19 07:26:23,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:23,360 INFO L495 AbstractCegarLoop]: Abstraction has 177300 states and 773804 transitions. [2022-11-19 07:26:23,361 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) [2022-11-19 07:26:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 177300 states and 773804 transitions. [2022-11-19 07:26:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:26:23,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:23,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:26:23,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:26:23,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-19 07:26:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1162046, now seen corresponding path program 1 times [2022-11-19 07:26:23,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:23,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236389881] [2022-11-19 07:26:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:23,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:23,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:23,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236389881] [2022-11-19 07:26:23,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236389881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:23,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:23,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:26:23,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517533902] [2022-11-19 07:26:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:23,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:23,894 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) [2022-11-19 07:26:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:26:27,044 INFO L93 Difference]: Finished difference Result 174542 states and 763389 transitions. [2022-11-19 07:26:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:26:27,045 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 [2022-11-19 07:26:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:26:28,405 INFO L225 Difference]: With dead ends: 174542 [2022-11-19 07:26:28,405 INFO L226 Difference]: Without dead ends: 174542 [2022-11-19 07:26:28,406 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 [2022-11-19 07:26:28,407 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 [2022-11-19 07:26:28,408 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] [2022-11-19 07:26:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174542 states. [2022-11-19 07:26:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174542 to 174542. [2022-11-19 07:26:35,842 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) [2022-11-19 07:26:38,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174542 states to 174542 states and 763389 transitions. [2022-11-19 07:26:38,227 INFO L78 Accepts]: Start accepts. Automaton has 174542 states and 763389 transitions. Word has length 3 [2022-11-19 07:26:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:26:38,228 INFO L495 AbstractCegarLoop]: Abstraction has 174542 states and 763389 transitions. [2022-11-19 07:26:38,228 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) [2022-11-19 07:26:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 174542 states and 763389 transitions. [2022-11-19 07:26:38,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:26:38,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:26:38,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:26:38,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:26:38,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-19 07:26:38,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:26:38,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1162047, now seen corresponding path program 1 times [2022-11-19 07:26:38,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:26:38,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051963393] [2022-11-19 07:26:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:38,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:26:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:38,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:26:38,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051963393] [2022-11-19 07:26:38,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051963393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:26:38,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:26:38,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:26:38,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406888470] [2022-11-19 07:26:38,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:26:38,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:26:38,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:26:38,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:26:38,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:26:38,514 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)