./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc --- 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 [2022-11-18 21:06:58,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:06:58,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:06:58,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:06:58,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:06:58,640 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:06:58,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:06:58,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:06:58,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:06:58,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:06:58,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:06:58,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:06:58,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:06:58,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:06:58,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:06:58,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:06:58,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:06:58,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:06:58,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:06:58,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:06:58,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:06:58,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:06:58,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:06:58,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:06:58,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:06:58,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:06:58,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:06:58,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:06:58,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:06:58,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:06:58,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:06:58,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:06:58,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:06:58,699 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:06:58,700 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:06:58,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:06:58,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:06:58,701 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:06:58,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:06:58,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:06:58,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:06:58,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 21:06:58,740 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:06:58,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:06:58,741 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:06:58,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:06:58,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:06:58,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:06:58,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:06:58,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:06:58,743 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:06:58,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:06:58,745 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:06:58,745 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 21:06:58,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:06:58,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:06:58,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:06:58,746 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 21:06:58,746 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 21:06:58,746 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 21:06:58,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:06:58,747 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 21:06:58,747 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:06:58,747 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:06:58,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:06:58,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:06:58,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:06:58,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:06:58,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:06:58,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:06:58,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:06:58,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:06:58,750 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_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 830cb16a3cbc120e059f0ed7638e33ed20360a11f425952cf536aa3d659b86fc [2022-11-18 21:06:59,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:06:59,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:06:59,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:06:59,068 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:06:59,069 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:06:59,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-11-18 21:06:59,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/data/55f0eb052/a522d1c0d63a4de881eb39c81f39e1bc/FLAGda6180aba [2022-11-18 21:06:59,620 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:06:59,631 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i [2022-11-18 21:06:59,661 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/data/55f0eb052/a522d1c0d63a4de881eb39c81f39e1bc/FLAGda6180aba [2022-11-18 21:06:59,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/data/55f0eb052/a522d1c0d63a4de881eb39c81f39e1bc [2022-11-18 21:06:59,953 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:06:59,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:06:59,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:06:59,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:06:59,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:06:59,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:06:59" (1/1) ... [2022-11-18 21:06:59,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590ebac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:06:59, skipping insertion in model container [2022-11-18 21:06:59,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:06:59" (1/1) ... [2022-11-18 21:06:59,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:07:00,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:07:00,518 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_85890714-0fa5-45af-8d65-4f0d7df281a5/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i[41322,41335] [2022-11-18 21:07:00,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:07:00,561 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:07:00,617 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_85890714-0fa5-45af-8d65-4f0d7df281a5/sv-benchmarks/c/goblint-regression/28-race_reach_06-cond_racing1.i[41322,41335] [2022-11-18 21:07:00,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:07:00,698 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:07:00,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00 WrapperNode [2022-11-18 21:07:00,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:07:00,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:07:00,700 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:07:00,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:07:00,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,744 INFO L138 Inliner]: procedures = 270, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-11-18 21:07:00,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:07:00,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:07:00,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:07:00,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:07:00,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,773 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:07:00,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:07:00,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:07:00,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:07:00,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (1/1) ... [2022-11-18 21:07:00,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:07:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:00,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:07:00,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:07:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 21:07:00,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 21:07:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 21:07:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 21:07:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 21:07:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:07:00,891 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 21:07:00,892 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 21:07:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:07:00,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:07:00,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:07:00,894 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 21:07:01,047 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:07:01,049 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:07:01,342 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:07:01,359 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:07:01,359 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-18 21:07:01,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:07:01 BoogieIcfgContainer [2022-11-18 21:07:01,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:07:01,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:07:01,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:07:01,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:07:01,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:06:59" (1/3) ... [2022-11-18 21:07:01,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ffbaa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:07:01, skipping insertion in model container [2022-11-18 21:07:01,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:07:00" (2/3) ... [2022-11-18 21:07:01,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ffbaa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:07:01, skipping insertion in model container [2022-11-18 21:07:01,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:07:01" (3/3) ... [2022-11-18 21:07:01,379 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_06-cond_racing1.i [2022-11-18 21:07:01,402 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:07:01,402 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-18 21:07:01,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 21:07:01,490 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 21:07:01,523 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 21:07:01,537 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 120 places, 132 transitions, 272 flow [2022-11-18 21:07:01,539 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 120 places, 132 transitions, 272 flow [2022-11-18 21:07:01,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 132 transitions, 272 flow [2022-11-18 21:07:01,634 INFO L130 PetriNetUnfolder]: 23/184 cut-off events. [2022-11-18 21:07:01,635 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 21:07:01,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 184 events. 23/184 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 471 event pairs, 0 based on Foata normal form. 0/146 useless extension candidates. Maximal degree in co-relation 92. Up to 6 conditions per place. [2022-11-18 21:07:01,649 INFO L119 LiptonReduction]: Number of co-enabled transitions 3248 [2022-11-18 21:07:06,910 INFO L134 LiptonReduction]: Checked pairs total: 5032 [2022-11-18 21:07:06,911 INFO L136 LiptonReduction]: Total number of compositions: 128 [2022-11-18 21:07:06,918 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 38 transitions, 84 flow [2022-11-18 21:07:06,945 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 186 states, 171 states have (on average 2.719298245614035) internal successors, (465), 185 states have internal predecessors, (465), 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) [2022-11-18 21:07:06,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:07:06,978 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;@5d567106, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:07:06,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-18 21:07:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 171 states have (on average 2.719298245614035) internal successors, (465), 185 states have internal predecessors, (465), 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) [2022-11-18 21:07:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 21:07:06,990 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:06,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 21:07:06,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:07,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:07,002 INFO L85 PathProgramCache]: Analyzing trace with hash 16461, now seen corresponding path program 1 times [2022-11-18 21:07:07,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:07,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967233611] [2022-11-18 21:07:07,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:07,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:07,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967233611] [2022-11-18 21:07:07,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967233611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:07,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:07:07,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:07:07,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644414986] [2022-11-18 21:07:07,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:07,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:07:07,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:07:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:07:07,374 INFO L87 Difference]: Start difference. First operand has 186 states, 171 states have (on average 2.719298245614035) internal successors, (465), 185 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:07,480 INFO L93 Difference]: Finished difference Result 164 states and 301 transitions. [2022-11-18 21:07:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:07:07,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 21:07:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:07,497 INFO L225 Difference]: With dead ends: 164 [2022-11-18 21:07:07,497 INFO L226 Difference]: Without dead ends: 153 [2022-11-18 21:07:07,498 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 [2022-11-18 21:07:07,504 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:07,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:07:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-18 21:07:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-11-18 21:07:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 144 states have (on average 1.9513888888888888) internal successors, (281), 152 states have internal predecessors, (281), 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) [2022-11-18 21:07:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 281 transitions. [2022-11-18 21:07:07,559 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 281 transitions. Word has length 2 [2022-11-18 21:07:07,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:07,560 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 281 transitions. [2022-11-18 21:07:07,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:07,560 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 281 transitions. [2022-11-18 21:07:07,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 21:07:07,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:07,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 21:07:07,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 21:07:07,561 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:07,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:07,562 INFO L85 PathProgramCache]: Analyzing trace with hash 16463, now seen corresponding path program 1 times [2022-11-18 21:07:07,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:07,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036996276] [2022-11-18 21:07:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:07,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:07,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:07,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036996276] [2022-11-18 21:07:07,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036996276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:07,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:07:07,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:07:07,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044378220] [2022-11-18 21:07:07,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:07,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:07:07,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:07,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:07:07,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:07:07,755 INFO L87 Difference]: Start difference. First operand 153 states and 281 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:07,828 INFO L93 Difference]: Finished difference Result 147 states and 273 transitions. [2022-11-18 21:07:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:07:07,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 21:07:07,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:07,830 INFO L225 Difference]: With dead ends: 147 [2022-11-18 21:07:07,830 INFO L226 Difference]: Without dead ends: 147 [2022-11-18 21:07:07,831 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 [2022-11-18 21:07:07,832 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:07,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:07:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-18 21:07:07,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-18 21:07:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 140 states have (on average 1.95) internal successors, (273), 146 states have internal predecessors, (273), 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) [2022-11-18 21:07:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 273 transitions. [2022-11-18 21:07:07,845 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 273 transitions. Word has length 2 [2022-11-18 21:07:07,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:07,846 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 273 transitions. [2022-11-18 21:07:07,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:07,846 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 273 transitions. [2022-11-18 21:07:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 21:07:07,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:07,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 21:07:07,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 21:07:07,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:07,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:07,848 INFO L85 PathProgramCache]: Analyzing trace with hash 490777029, now seen corresponding path program 1 times [2022-11-18 21:07:07,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:07,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349505581] [2022-11-18 21:07:07,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:07,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:07,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:08,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349505581] [2022-11-18 21:07:08,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349505581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:08,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569033352] [2022-11-18 21:07:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:08,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:08,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:08,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:08,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:07:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 21:07:08,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:08,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:07:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:08,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:08,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569033352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:08,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:07:08,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-18 21:07:08,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206081363] [2022-11-18 21:07:08,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:08,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 21:07:08,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 21:07:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:07:08,287 INFO L87 Difference]: Start difference. First operand 147 states and 273 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-18 21:07:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:08,383 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2022-11-18 21:07:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:07:08,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 21:07:08,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:08,385 INFO L225 Difference]: With dead ends: 43 [2022-11-18 21:07:08,385 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 21:07:08,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-18 21:07:08,386 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:08,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 7 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:07:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 21:07:08,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-18 21:07:08,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 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) [2022-11-18 21:07:08,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 69 transitions. [2022-11-18 21:07:08,390 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 69 transitions. Word has length 5 [2022-11-18 21:07:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:08,391 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 69 transitions. [2022-11-18 21:07:08,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-18 21:07:08,391 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 69 transitions. [2022-11-18 21:07:08,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 21:07:08,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:08,392 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-18 21:07:08,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:08,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:08,597 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:08,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:08,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1965780960, now seen corresponding path program 1 times [2022-11-18 21:07:08,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:08,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757701016] [2022-11-18 21:07:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:08,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 21:07:08,625 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 21:07:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 21:07:08,650 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 21:07:08,650 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 21:07:08,652 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-18 21:07:08,653 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-18 21:07:08,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-18 21:07:08,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-18 21:07:08,654 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-18 21:07:08,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-18 21:07:08,655 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-18 21:07:08,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 21:07:08,658 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 21:07:08,660 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 21:07:08,660 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 21:07:08,680 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 21:07:08,683 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 21:07:08,683 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 162 transitions, 342 flow [2022-11-18 21:07:08,684 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 162 transitions, 342 flow [2022-11-18 21:07:08,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 162 transitions, 342 flow [2022-11-18 21:07:08,745 INFO L130 PetriNetUnfolder]: 40/296 cut-off events. [2022-11-18 21:07:08,746 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 21:07:08,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 296 events. 40/296 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 918 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 186. Up to 9 conditions per place. [2022-11-18 21:07:08,756 INFO L119 LiptonReduction]: Number of co-enabled transitions 8680 [2022-11-18 21:07:14,058 INFO L134 LiptonReduction]: Checked pairs total: 19534 [2022-11-18 21:07:14,059 INFO L136 LiptonReduction]: Total number of compositions: 147 [2022-11-18 21:07:14,060 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 61 transitions, 140 flow [2022-11-18 21:07:14,172 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2933 states, 2907 states have (on average 3.810457516339869) internal successors, (11077), 2932 states have internal predecessors, (11077), 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) [2022-11-18 21:07:14,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:07:14,174 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;@5d567106, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:07:14,174 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-18 21:07:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand has 2933 states, 2907 states have (on average 3.810457516339869) internal successors, (11077), 2932 states have internal predecessors, (11077), 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) [2022-11-18 21:07:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 21:07:14,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:14,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 21:07:14,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:14,186 INFO L85 PathProgramCache]: Analyzing trace with hash 27311, now seen corresponding path program 1 times [2022-11-18 21:07:14,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:14,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654879901] [2022-11-18 21:07:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:14,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:14,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:14,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654879901] [2022-11-18 21:07:14,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654879901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:14,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:07:14,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:07:14,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711439083] [2022-11-18 21:07:14,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:14,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:07:14,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:14,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:07:14,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:07:14,257 INFO L87 Difference]: Start difference. First operand has 2933 states, 2907 states have (on average 3.810457516339869) internal successors, (11077), 2932 states have internal predecessors, (11077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:14,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:14,399 INFO L93 Difference]: Finished difference Result 2927 states and 8001 transitions. [2022-11-18 21:07:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:07:14,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 21:07:14,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:14,423 INFO L225 Difference]: With dead ends: 2927 [2022-11-18 21:07:14,423 INFO L226 Difference]: Without dead ends: 2758 [2022-11-18 21:07:14,424 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 [2022-11-18 21:07:14,425 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:14,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:07:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2022-11-18 21:07:14,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 2758. [2022-11-18 21:07:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2758 states, 2738 states have (on average 2.756026296566837) internal successors, (7546), 2757 states have internal predecessors, (7546), 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) [2022-11-18 21:07:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2758 states to 2758 states and 7546 transitions. [2022-11-18 21:07:14,560 INFO L78 Accepts]: Start accepts. Automaton has 2758 states and 7546 transitions. Word has length 2 [2022-11-18 21:07:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:14,561 INFO L495 AbstractCegarLoop]: Abstraction has 2758 states and 7546 transitions. [2022-11-18 21:07:14,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2758 states and 7546 transitions. [2022-11-18 21:07:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 21:07:14,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:14,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 21:07:14,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 21:07:14,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash 27312, now seen corresponding path program 1 times [2022-11-18 21:07:14,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:14,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735847691] [2022-11-18 21:07:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:14,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:14,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:14,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735847691] [2022-11-18 21:07:14,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735847691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:14,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:07:14,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:07:14,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868022100] [2022-11-18 21:07:14,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:14,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:07:14,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:07:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:07:14,597 INFO L87 Difference]: Start difference. First operand 2758 states and 7546 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:14,689 INFO L93 Difference]: Finished difference Result 2432 states and 6659 transitions. [2022-11-18 21:07:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:07:14,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 21:07:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:14,705 INFO L225 Difference]: With dead ends: 2432 [2022-11-18 21:07:14,705 INFO L226 Difference]: Without dead ends: 2432 [2022-11-18 21:07:14,705 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 [2022-11-18 21:07:14,706 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:14,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 19 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:07:14,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2022-11-18 21:07:14,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2432. [2022-11-18 21:07:14,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2419 states have (on average 2.7527904092600246) internal successors, (6659), 2431 states have internal predecessors, (6659), 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) [2022-11-18 21:07:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 6659 transitions. [2022-11-18 21:07:14,785 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 6659 transitions. Word has length 2 [2022-11-18 21:07:14,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:14,786 INFO L495 AbstractCegarLoop]: Abstraction has 2432 states and 6659 transitions. [2022-11-18 21:07:14,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 6659 transitions. [2022-11-18 21:07:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 21:07:14,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:14,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 21:07:14,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 21:07:14,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -527779364, now seen corresponding path program 1 times [2022-11-18 21:07:14,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:14,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638165219] [2022-11-18 21:07:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:14,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:14,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:14,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638165219] [2022-11-18 21:07:14,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638165219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865589070] [2022-11-18 21:07:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:14,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:14,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:14,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:14,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:07:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:14,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 21:07:14,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:15,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:07:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:15,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:15,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865589070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:15,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:07:15,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-18 21:07:15,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3243093] [2022-11-18 21:07:15,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:15,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 21:07:15,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:15,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 21:07:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:07:15,164 INFO L87 Difference]: Start difference. First operand 2432 states and 6659 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:15,405 INFO L93 Difference]: Finished difference Result 2216 states and 6089 transitions. [2022-11-18 21:07:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:07:15,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 21:07:15,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:15,417 INFO L225 Difference]: With dead ends: 2216 [2022-11-18 21:07:15,418 INFO L226 Difference]: Without dead ends: 2216 [2022-11-18 21:07:15,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:07:15,419 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 174 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:15,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 80 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:07:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2022-11-18 21:07:15,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2216. [2022-11-18 21:07:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 2206 states have (on average 2.760199456029012) internal successors, (6089), 2215 states have internal predecessors, (6089), 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) [2022-11-18 21:07:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 6089 transitions. [2022-11-18 21:07:15,485 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 6089 transitions. Word has length 6 [2022-11-18 21:07:15,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:15,485 INFO L495 AbstractCegarLoop]: Abstraction has 2216 states and 6089 transitions. [2022-11-18 21:07:15,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 6089 transitions. [2022-11-18 21:07:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 21:07:15,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:15,487 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-18 21:07:15,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:15,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 21:07:15,692 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:15,693 INFO L85 PathProgramCache]: Analyzing trace with hash 842253900, now seen corresponding path program 1 times [2022-11-18 21:07:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:15,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832446065] [2022-11-18 21:07:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:15,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:15,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:15,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832446065] [2022-11-18 21:07:15,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832446065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:15,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325743219] [2022-11-18 21:07:15,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:15,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:15,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:15,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:15,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:07:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:07:15,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:15,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:15,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325743219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:15,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:07:15,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-18 21:07:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970953171] [2022-11-18 21:07:15,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:15,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:07:15,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:07:15,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:07:15,989 INFO L87 Difference]: Start difference. First operand 2216 states and 6089 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-11-18 21:07:16,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:16,095 INFO L93 Difference]: Finished difference Result 771 states and 1991 transitions. [2022-11-18 21:07:16,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 21:07:16,096 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 21:07:16,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:16,099 INFO L225 Difference]: With dead ends: 771 [2022-11-18 21:07:16,099 INFO L226 Difference]: Without dead ends: 771 [2022-11-18 21:07:16,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2022-11-18 21:07:16,101 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 178 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:16,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 39 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:07:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-18 21:07:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-18 21:07:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 2.585714285714286) internal successors, (1991), 770 states have internal predecessors, (1991), 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) [2022-11-18 21:07:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1991 transitions. [2022-11-18 21:07:16,148 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1991 transitions. Word has length 11 [2022-11-18 21:07:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:16,149 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1991 transitions. [2022-11-18 21:07:16,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-11-18 21:07:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1991 transitions. [2022-11-18 21:07:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 21:07:16,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:16,152 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-18 21:07:16,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:16,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:16,359 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:16,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:16,360 INFO L85 PathProgramCache]: Analyzing trace with hash 842252443, now seen corresponding path program 1 times [2022-11-18 21:07:16,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:16,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494914965] [2022-11-18 21:07:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:16,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 21:07:16,374 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 21:07:16,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 21:07:16,387 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 21:07:16,387 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 21:07:16,388 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-18 21:07:16,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-18 21:07:16,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-18 21:07:16,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-18 21:07:16,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-18 21:07:16,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-18 21:07:16,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-18 21:07:16,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 21:07:16,389 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 21:07:16,390 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 21:07:16,390 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 21:07:16,409 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 21:07:16,412 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 21:07:16,412 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 192 transitions, 414 flow [2022-11-18 21:07:16,412 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 192 transitions, 414 flow [2022-11-18 21:07:16,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 192 transitions, 414 flow [2022-11-18 21:07:16,485 INFO L130 PetriNetUnfolder]: 62/451 cut-off events. [2022-11-18 21:07:16,485 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-18 21:07:16,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 451 events. 62/451 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1610 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 304. Up to 16 conditions per place. [2022-11-18 21:07:16,506 INFO L119 LiptonReduction]: Number of co-enabled transitions 15624 [2022-11-18 21:07:21,773 INFO L134 LiptonReduction]: Checked pairs total: 37725 [2022-11-18 21:07:21,773 INFO L136 LiptonReduction]: Total number of compositions: 168 [2022-11-18 21:07:21,774 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 80 transitions, 190 flow [2022-11-18 21:07:23,123 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 36581 states, 36536 states have (on average 5.139314648565798) internal successors, (187770), 36580 states have internal predecessors, (187770), 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) [2022-11-18 21:07:23,124 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:07:23,125 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;@5d567106, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:07:23,125 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-18 21:07:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 36581 states, 36536 states have (on average 5.139314648565798) internal successors, (187770), 36580 states have internal predecessors, (187770), 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) [2022-11-18 21:07:23,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 21:07:23,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:23,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 21:07:23,198 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:23,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:23,198 INFO L85 PathProgramCache]: Analyzing trace with hash 39786, now seen corresponding path program 1 times [2022-11-18 21:07:23,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:23,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458003674] [2022-11-18 21:07:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:23,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:23,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:23,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458003674] [2022-11-18 21:07:23,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458003674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:23,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:07:23,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:07:23,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926683119] [2022-11-18 21:07:23,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:23,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:07:23,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:23,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:07:23,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:07:23,292 INFO L87 Difference]: Start difference. First operand has 36581 states, 36536 states have (on average 5.139314648565798) internal successors, (187770), 36580 states have internal predecessors, (187770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:24,366 INFO L93 Difference]: Finished difference Result 32499 states and 117408 transitions. [2022-11-18 21:07:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:07:24,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 21:07:24,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:25,079 INFO L225 Difference]: With dead ends: 32499 [2022-11-18 21:07:25,079 INFO L226 Difference]: Without dead ends: 30302 [2022-11-18 21:07:25,080 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 [2022-11-18 21:07:25,081 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:25,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 29 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:07:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30302 states. [2022-11-18 21:07:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30302 to 30302. [2022-11-18 21:07:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30302 states, 30277 states have (on average 3.6210324668890577) internal successors, (109634), 30301 states have internal predecessors, (109634), 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) [2022-11-18 21:07:26,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30302 states to 30302 states and 109634 transitions. [2022-11-18 21:07:26,913 INFO L78 Accepts]: Start accepts. Automaton has 30302 states and 109634 transitions. Word has length 2 [2022-11-18 21:07:26,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:26,914 INFO L495 AbstractCegarLoop]: Abstraction has 30302 states and 109634 transitions. [2022-11-18 21:07:26,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 30302 states and 109634 transitions. [2022-11-18 21:07:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 21:07:26,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:26,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 21:07:26,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 21:07:26,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:26,917 INFO L85 PathProgramCache]: Analyzing trace with hash 39787, now seen corresponding path program 1 times [2022-11-18 21:07:26,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:26,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300100166] [2022-11-18 21:07:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:26,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:26,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:26,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300100166] [2022-11-18 21:07:26,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300100166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:26,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:07:26,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:07:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946698256] [2022-11-18 21:07:26,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:26,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:07:26,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:07:26,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:07:27,000 INFO L87 Difference]: Start difference. First operand 30302 states and 109634 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:27,512 INFO L93 Difference]: Finished difference Result 30296 states and 109626 transitions. [2022-11-18 21:07:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:07:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-18 21:07:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:27,738 INFO L225 Difference]: With dead ends: 30296 [2022-11-18 21:07:27,739 INFO L226 Difference]: Without dead ends: 30296 [2022-11-18 21:07:27,739 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 [2022-11-18 21:07:27,740 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:27,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 32 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:07:28,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30296 states. [2022-11-18 21:07:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30296 to 30296. [2022-11-18 21:07:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30296 states, 30273 states have (on average 3.6212466554355367) internal successors, (109626), 30295 states have internal predecessors, (109626), 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) [2022-11-18 21:07:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30296 states to 30296 states and 109626 transitions. [2022-11-18 21:07:29,334 INFO L78 Accepts]: Start accepts. Automaton has 30296 states and 109626 transitions. Word has length 2 [2022-11-18 21:07:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:29,334 INFO L495 AbstractCegarLoop]: Abstraction has 30296 states and 109626 transitions. [2022-11-18 21:07:29,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 30296 states and 109626 transitions. [2022-11-18 21:07:29,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 21:07:29,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:29,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 21:07:29,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 21:07:29,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:29,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1880485349, now seen corresponding path program 1 times [2022-11-18 21:07:29,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:29,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614766681] [2022-11-18 21:07:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:29,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:29,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:29,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614766681] [2022-11-18 21:07:29,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614766681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:29,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112629303] [2022-11-18 21:07:29,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:29,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:29,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:29,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:29,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:07:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:29,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 21:07:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:29,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 21:07:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:29,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:29,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112629303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:29,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:07:29,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-18 21:07:29,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082173437] [2022-11-18 21:07:29,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:29,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 21:07:29,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:29,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 21:07:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 21:07:29,662 INFO L87 Difference]: Start difference. First operand 30296 states and 109626 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:30,388 INFO L93 Difference]: Finished difference Result 28908 states and 104060 transitions. [2022-11-18 21:07:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:07:30,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-18 21:07:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:30,556 INFO L225 Difference]: With dead ends: 28908 [2022-11-18 21:07:30,556 INFO L226 Difference]: Without dead ends: 28908 [2022-11-18 21:07:30,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:07:30,558 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 279 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:30,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 88 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 21:07:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28908 states. [2022-11-18 21:07:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28908 to 28352. [2022-11-18 21:07:31,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28352 states, 28333 states have (on average 3.620372004376522) internal successors, (102576), 28351 states have internal predecessors, (102576), 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) [2022-11-18 21:07:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28352 states to 28352 states and 102576 transitions. [2022-11-18 21:07:31,577 INFO L78 Accepts]: Start accepts. Automaton has 28352 states and 102576 transitions. Word has length 6 [2022-11-18 21:07:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:31,577 INFO L495 AbstractCegarLoop]: Abstraction has 28352 states and 102576 transitions. [2022-11-18 21:07:31,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:07:31,577 INFO L276 IsEmpty]: Start isEmpty. Operand 28352 states and 102576 transitions. [2022-11-18 21:07:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 21:07:31,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:31,579 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-18 21:07:31,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:31,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:31,783 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:31,784 INFO L85 PathProgramCache]: Analyzing trace with hash -280262050, now seen corresponding path program 1 times [2022-11-18 21:07:31,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:31,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889775465] [2022-11-18 21:07:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:31,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 21:07:31,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:31,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889775465] [2022-11-18 21:07:31,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889775465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:07:31,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929851066] [2022-11-18 21:07:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:31,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:31,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:07:31,897 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:07:31,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:07:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:31,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:07:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:07:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:32,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:07:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:32,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929851066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:07:32,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:07:32,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-18 21:07:32,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118291634] [2022-11-18 21:07:32,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:07:32,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 21:07:32,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:32,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 21:07:32,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-18 21:07:32,079 INFO L87 Difference]: Start difference. First operand 28352 states and 102576 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-11-18 21:07:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:07:32,308 INFO L93 Difference]: Finished difference Result 9267 states and 32399 transitions. [2022-11-18 21:07:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:07:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-18 21:07:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:07:32,593 INFO L225 Difference]: With dead ends: 9267 [2022-11-18 21:07:32,607 INFO L226 Difference]: Without dead ends: 9267 [2022-11-18 21:07:32,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-11-18 21:07:32,608 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 259 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:07:32,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 86 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 21:07:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2022-11-18 21:07:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 9267. [2022-11-18 21:07:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9267 states, 9266 states have (on average 3.496546514137708) internal successors, (32399), 9266 states have internal predecessors, (32399), 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) [2022-11-18 21:07:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 32399 transitions. [2022-11-18 21:07:32,892 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 32399 transitions. Word has length 11 [2022-11-18 21:07:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:07:32,893 INFO L495 AbstractCegarLoop]: Abstraction has 9267 states and 32399 transitions. [2022-11-18 21:07:32,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-11-18 21:07:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 32399 transitions. [2022-11-18 21:07:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 21:07:32,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:32,896 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-18 21:07:32,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 21:07:33,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85890714-0fa5-45af-8d65-4f0d7df281a5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:07:33,100 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:33,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1770579525, now seen corresponding path program 1 times [2022-11-18 21:07:33,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:33,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399358544] [2022-11-18 21:07:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:33,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 21:07:33,116 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 21:07:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 21:07:33,131 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 21:07:33,131 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 21:07:33,131 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-18 21:07:33,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-18 21:07:33,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-18 21:07:33,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-18 21:07:33,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-18 21:07:33,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-18 21:07:33,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-18 21:07:33,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 21:07:33,133 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-18 21:07:33,134 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 21:07:33,134 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 21:07:33,154 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 21:07:33,157 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 21:07:33,157 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 195 places, 222 transitions, 488 flow [2022-11-18 21:07:33,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 195 places, 222 transitions, 488 flow [2022-11-18 21:07:33,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 222 transitions, 488 flow [2022-11-18 21:07:33,270 INFO L130 PetriNetUnfolder]: 96/694 cut-off events. [2022-11-18 21:07:33,270 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-18 21:07:33,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 694 events. 96/694 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2878 event pairs, 6 based on Foata normal form. 0/535 useless extension candidates. Maximal degree in co-relation 471. Up to 32 conditions per place. [2022-11-18 21:07:33,301 INFO L119 LiptonReduction]: Number of co-enabled transitions 24304 [2022-11-18 21:07:39,407 INFO L134 LiptonReduction]: Checked pairs total: 62886 [2022-11-18 21:07:39,407 INFO L136 LiptonReduction]: Total number of compositions: 189 [2022-11-18 21:07:39,408 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 77 places, 99 transitions, 242 flow [2022-11-18 21:07:58,502 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 456581 states, 456501 states have (on average 6.48897373718787) internal successors, (2962223), 456580 states have internal predecessors, (2962223), 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) [2022-11-18 21:07:58,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:07:58,523 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;@5d567106, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:07:58,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-18 21:07:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 456581 states, 456501 states have (on average 6.48897373718787) internal successors, (2962223), 456580 states have internal predecessors, (2962223), 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) [2022-11-18 21:07:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 21:07:59,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:07:59,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 21:07:59,279 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-18 21:07:59,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:07:59,281 INFO L85 PathProgramCache]: Analyzing trace with hash 53897, now seen corresponding path program 1 times [2022-11-18 21:07:59,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:07:59,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865028787] [2022-11-18 21:07:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:07:59,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:07:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:07:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:07:59,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:07:59,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865028787] [2022-11-18 21:07:59,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865028787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:07:59,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:07:59,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:07:59,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787775331] [2022-11-18 21:07:59,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:07:59,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:07:59,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:07:59,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:07:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:08:00,034 INFO L87 Difference]: Start difference. First operand has 456581 states, 456501 states have (on average 6.48897373718787) internal successors, (2962223), 456580 states have internal predecessors, (2962223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)