./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --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 eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:47:22,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:47:22,239 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:47:22,245 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:47:22,245 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:47:22,271 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:47:22,272 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:47:22,272 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:47:22,273 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:47:22,274 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:47:22,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:47:22,275 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:47:22,275 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:47:22,276 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:47:22,277 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:47:22,277 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:47:22,278 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:47:22,278 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:47:22,279 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:47:22,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:47:22,280 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:47:22,281 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:47:22,281 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:47:22,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:47:22,282 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:47:22,282 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:47:22,283 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:47:22,283 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:47:22,284 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:47:22,284 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:47:22,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:47:22,285 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:47:22,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:22,286 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:47:22,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:47:22,287 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:47:22,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:47:22,287 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:47:22,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:47:22,288 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:47:22,288 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:47:22,288 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eddb66a74cd149f880832378d52d5c02c94fd6efcf2d83aeade11bcdaaabe426 [2023-11-26 11:47:22,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:47:22,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:47:22,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:47:22,547 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:47:22,547 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:47:22,548 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2023-11-26 11:47:25,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:47:26,110 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:47:26,111 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/sv-benchmarks/c/goblint-regression/28-race_reach_01-simple_racing.i [2023-11-26 11:47:26,140 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/data/68fc1bc6f/baa50fa8105a46de8ce843dfa6c479a2/FLAG38fc4b5f1 [2023-11-26 11:47:26,162 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/data/68fc1bc6f/baa50fa8105a46de8ce843dfa6c479a2 [2023-11-26 11:47:26,173 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:47:26,175 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:47:26,179 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:26,180 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:47:26,186 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:47:26,187 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,188 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6a2aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26, skipping insertion in model container [2023-11-26 11:47:26,188 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,254 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:47:26,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:26,709 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:47:26,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:47:26,836 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:47:26,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26 WrapperNode [2023-11-26 11:47:26,837 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:47:26,838 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:26,838 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:47:26,839 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:47:26,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,867 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,904 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2023-11-26 11:47:26,904 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:47:26,905 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:47:26,905 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:47:26,906 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:47:26,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,921 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,925 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,941 INFO L175 MemorySlicer]: Split 19 memory accesses to 5 slices as follows [2, 5, 5, 5, 2]. 26 percent of accesses are in the largest equivalence class. The 17 initializations are split as follows [2, 5, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 0, 1]. [2023-11-26 11:47:26,942 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,952 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,959 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,960 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,965 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:47:26,966 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:47:26,966 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:47:26,967 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:47:26,967 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (1/1) ... [2023-11-26 11:47:26,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:47:26,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:27,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:47:27,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:47:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:47:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:47:27,035 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:47:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:47:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-26 11:47:27,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:47:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:47:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:47:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:47:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-26 11:47:27,037 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 11:47:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:47:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:47:27,038 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-26 11:47:27,038 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-26 11:47:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:47:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:47:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:47:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:47:27,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:47:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-26 11:47:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 11:47:27,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:47:27,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:47:27,042 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:47:27,210 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:47:27,212 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:47:27,515 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:47:27,732 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:47:27,733 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-26 11:47:27,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:27 BoogieIcfgContainer [2023-11-26 11:47:27,734 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:47:27,740 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:47:27,740 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:47:27,743 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:47:27,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:47:26" (1/3) ... [2023-11-26 11:47:27,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb1d729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:27, skipping insertion in model container [2023-11-26 11:47:27,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:47:26" (2/3) ... [2023-11-26 11:47:27,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb1d729 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:47:27, skipping insertion in model container [2023-11-26 11:47:27,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:47:27" (3/3) ... [2023-11-26 11:47:27,748 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_01-simple_racing.i [2023-11-26 11:47:27,768 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:47:27,768 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-26 11:47:27,769 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:47:27,806 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-26 11:47:27,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 60 transitions, 127 flow [2023-11-26 11:47:27,883 INFO L124 PetriNetUnfolderBase]: 15/91 cut-off events. [2023-11-26 11:47:27,883 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:47:27,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 91 events. 15/91 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 347 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-11-26 11:47:27,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 60 transitions, 127 flow [2023-11-26 11:47:27,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 60 transitions, 127 flow [2023-11-26 11:47:27,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:47:27,909 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=PETRI_NET, 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;@3d692627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:47:27,909 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 11:47:27,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:47:27,914 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 11:47:27,914 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:47:27,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:27,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:47:27,916 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)] === [2023-11-26 11:47:27,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:27,921 INFO L85 PathProgramCache]: Analyzing trace with hash 356047, now seen corresponding path program 1 times [2023-11-26 11:47:27,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:27,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108483134] [2023-11-26 11:47:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:27,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:28,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:28,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108483134] [2023-11-26 11:47:28,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108483134] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:28,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:28,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:47:28,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026515582] [2023-11-26 11:47:28,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:28,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:28,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:28,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2023-11-26 11:47:28,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 60 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2023-11-26 11:47:28,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:28,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2023-11-26 11:47:28,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:28,459 INFO L124 PetriNetUnfolderBase]: 136/437 cut-off events. [2023-11-26 11:47:28,459 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 11:47:28,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 437 events. 136/437 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2207 event pairs, 117 based on Foata normal form. 94/512 useless extension candidates. Maximal degree in co-relation 700. Up to 272 conditions per place. [2023-11-26 11:47:28,465 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 34 selfloop transitions, 2 changer transitions 1/56 dead transitions. [2023-11-26 11:47:28,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 56 transitions, 193 flow [2023-11-26 11:47:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2023-11-26 11:47:28,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2023-11-26 11:47:28,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 112 transitions. [2023-11-26 11:47:28,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 112 transitions. [2023-11-26 11:47:28,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:28,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 112 transitions. [2023-11-26 11:47:28,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2023-11-26 11:47:28,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2023-11-26 11:47:28,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2023-11-26 11:47:28,498 INFO L175 Difference]: Start difference. First operand has 52 places, 60 transitions, 127 flow. Second operand 3 states and 112 transitions. [2023-11-26 11:47:28,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 56 transitions, 193 flow [2023-11-26 11:47:28,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 56 transitions, 193 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:47:28,505 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 103 flow [2023-11-26 11:47:28,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-26 11:47:28,511 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-26 11:47:28,511 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 103 flow [2023-11-26 11:47:28,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2023-11-26 11:47:28,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:28,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:47:28,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:47:28,512 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)] === [2023-11-26 11:47:28,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:28,513 INFO L85 PathProgramCache]: Analyzing trace with hash 356048, now seen corresponding path program 1 times [2023-11-26 11:47:28,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:28,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154543987] [2023-11-26 11:47:28,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:28,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:28,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:28,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154543987] [2023-11-26 11:47:28,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154543987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:28,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:28,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:47:28,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115603877] [2023-11-26 11:47:28,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:28,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:28,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:28,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2023-11-26 11:47:28,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2023-11-26 11:47:28,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:28,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2023-11-26 11:47:28,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:28,867 INFO L124 PetriNetUnfolderBase]: 117/394 cut-off events. [2023-11-26 11:47:28,867 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2023-11-26 11:47:28,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 675 conditions, 394 events. 117/394 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1929 event pairs, 96 based on Foata normal form. 1/368 useless extension candidates. Maximal degree in co-relation 646. Up to 251 conditions per place. [2023-11-26 11:47:28,872 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 34 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-11-26 11:47:28,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 56 transitions, 195 flow [2023-11-26 11:47:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2023-11-26 11:47:28,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-11-26 11:47:28,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 104 transitions. [2023-11-26 11:47:28,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 104 transitions. [2023-11-26 11:47:28,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:28,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 104 transitions. [2023-11-26 11:47:28,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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) [2023-11-26 11:47:28,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2023-11-26 11:47:28,899 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 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) [2023-11-26 11:47:28,899 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 103 flow. Second operand 3 states and 104 transitions. [2023-11-26 11:47:28,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 56 transitions, 195 flow [2023-11-26 11:47:28,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:28,904 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 109 flow [2023-11-26 11:47:28,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-11-26 11:47:28,905 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-11-26 11:47:28,905 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 109 flow [2023-11-26 11:47:28,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 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) [2023-11-26 11:47:28,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:28,906 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 11:47:28,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:47:28,907 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)] === [2023-11-26 11:47:28,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:28,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1885010568, now seen corresponding path program 1 times [2023-11-26 11:47:28,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:28,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463822515] [2023-11-26 11:47:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:28,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:29,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:29,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463822515] [2023-11-26 11:47:29,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463822515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:29,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150818522] [2023-11-26 11:47:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:29,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:29,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:29,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:29,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:47:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:29,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:47:29,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:29,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:47:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:29,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:29,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150818522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:29,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:29,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-26 11:47:29,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336671484] [2023-11-26 11:47:29,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:29,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 11:47:29,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:29,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 11:47:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:47:29,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2023-11-26 11:47:29,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 109 flow. Second operand has 9 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 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) [2023-11-26 11:47:29,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:29,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2023-11-26 11:47:29,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:29,706 INFO L124 PetriNetUnfolderBase]: 27/100 cut-off events. [2023-11-26 11:47:29,706 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-26 11:47:29,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 100 events. 27/100 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 227 event pairs, 18 based on Foata normal form. 20/119 useless extension candidates. Maximal degree in co-relation 179. Up to 57 conditions per place. [2023-11-26 11:47:29,710 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 23 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2023-11-26 11:47:29,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 128 flow [2023-11-26 11:47:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:47:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:47:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2023-11-26 11:47:29,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2023-11-26 11:47:29,715 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 111 transitions. [2023-11-26 11:47:29,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 111 transitions. [2023-11-26 11:47:29,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:29,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 111 transitions. [2023-11-26 11:47:29,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2023-11-26 11:47:29,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 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) [2023-11-26 11:47:29,718 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 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) [2023-11-26 11:47:29,718 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 109 flow. Second operand 4 states and 111 transitions. [2023-11-26 11:47:29,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 128 flow [2023-11-26 11:47:29,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:47:29,720 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 54 flow [2023-11-26 11:47:29,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-26 11:47:29,722 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -23 predicate places. [2023-11-26 11:47:29,722 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 54 flow [2023-11-26 11:47:29,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.333333333333332) internal successors, (210), 9 states have internal predecessors, (210), 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) [2023-11-26 11:47:29,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:29,723 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-26 11:47:29,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:29,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:29,930 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)] === [2023-11-26 11:47:29,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:29,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1694214849, now seen corresponding path program 1 times [2023-11-26 11:47:29,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:29,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101218676] [2023-11-26 11:47:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:29,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:47:29,967 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:47:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:47:30,019 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:47:30,019 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 11:47:30,020 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-26 11:47:30,023 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-26 11:47:30,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-26 11:47:30,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-26 11:47:30,024 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-26 11:47:30,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-26 11:47:30,025 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-26 11:47:30,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:47:30,025 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 11:47:30,028 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 11:47:30,028 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-26 11:47:30,064 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:47:30,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 85 transitions, 186 flow [2023-11-26 11:47:30,091 INFO L124 PetriNetUnfolderBase]: 27/159 cut-off events. [2023-11-26 11:47:30,091 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 11:47:30,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 159 events. 27/159 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 676 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2023-11-26 11:47:30,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 85 transitions, 186 flow [2023-11-26 11:47:30,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 85 transitions, 186 flow [2023-11-26 11:47:30,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:47:30,101 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=PETRI_NET, 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;@3d692627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:47:30,101 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 11:47:30,104 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:47:30,104 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 11:47:30,104 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:47:30,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:30,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:47:30,105 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)] === [2023-11-26 11:47:30,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:30,106 INFO L85 PathProgramCache]: Analyzing trace with hash 440452, now seen corresponding path program 1 times [2023-11-26 11:47:30,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:30,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484867110] [2023-11-26 11:47:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:30,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:30,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484867110] [2023-11-26 11:47:30,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484867110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:30,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:30,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:47:30,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530220485] [2023-11-26 11:47:30,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:30,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:30,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:30,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:30,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 85 [2023-11-26 11:47:30,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2023-11-26 11:47:30,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:30,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 85 [2023-11-26 11:47:30,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:31,328 INFO L124 PetriNetUnfolderBase]: 2991/6066 cut-off events. [2023-11-26 11:47:31,329 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-26 11:47:31,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10951 conditions, 6066 events. 2991/6066 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 46024 event pairs, 2583 based on Foata normal form. 1632/7435 useless extension candidates. Maximal degree in co-relation 8032. Up to 4189 conditions per place. [2023-11-26 11:47:31,381 INFO L140 encePairwiseOnDemand]: 65/85 looper letters, 54 selfloop transitions, 2 changer transitions 1/84 dead transitions. [2023-11-26 11:47:31,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 298 flow [2023-11-26 11:47:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-26 11:47:31,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2023-11-26 11:47:31,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-26 11:47:31,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-26 11:47:31,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:31,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-26 11:47:31,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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) [2023-11-26 11:47:31,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-26 11:47:31,387 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-26 11:47:31,387 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 186 flow. Second operand 3 states and 168 transitions. [2023-11-26 11:47:31,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 298 flow [2023-11-26 11:47:31,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 84 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:47:31,391 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 150 flow [2023-11-26 11:47:31,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2023-11-26 11:47:31,392 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-11-26 11:47:31,393 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 150 flow [2023-11-26 11:47:31,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2023-11-26 11:47:31,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:31,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:47:31,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:47:31,394 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)] === [2023-11-26 11:47:31,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:31,394 INFO L85 PathProgramCache]: Analyzing trace with hash 440453, now seen corresponding path program 1 times [2023-11-26 11:47:31,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:31,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873733066] [2023-11-26 11:47:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:31,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:31,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873733066] [2023-11-26 11:47:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873733066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:31,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:31,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:47:31,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878135214] [2023-11-26 11:47:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:31,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:31,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:31,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 85 [2023-11-26 11:47:31,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2023-11-26 11:47:31,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:31,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 85 [2023-11-26 11:47:31,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:32,437 INFO L124 PetriNetUnfolderBase]: 2594/5471 cut-off events. [2023-11-26 11:47:32,437 INFO L125 PetriNetUnfolderBase]: For 127/135 co-relation queries the response was YES. [2023-11-26 11:47:32,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9831 conditions, 5471 events. 2594/5471 cut-off events. For 127/135 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 41828 event pairs, 2574 based on Foata normal form. 1/5164 useless extension candidates. Maximal degree in co-relation 9025. Up to 4168 conditions per place. [2023-11-26 11:47:32,480 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 46 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-11-26 11:47:32,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 268 flow [2023-11-26 11:47:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:32,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2023-11-26 11:47:32,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5490196078431373 [2023-11-26 11:47:32,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2023-11-26 11:47:32,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2023-11-26 11:47:32,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:32,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2023-11-26 11:47:32,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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) [2023-11-26 11:47:32,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-26 11:47:32,485 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 states have internal predecessors, (340), 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) [2023-11-26 11:47:32,486 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 150 flow. Second operand 3 states and 140 transitions. [2023-11-26 11:47:32,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 268 flow [2023-11-26 11:47:32,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 76 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:32,496 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 160 flow [2023-11-26 11:47:32,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2023-11-26 11:47:32,497 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-11-26 11:47:32,497 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 160 flow [2023-11-26 11:47:32,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2023-11-26 11:47:32,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:32,498 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 11:47:32,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:47:32,498 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)] === [2023-11-26 11:47:32,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1241330058, now seen corresponding path program 1 times [2023-11-26 11:47:32,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:32,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483587729] [2023-11-26 11:47:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:32,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:32,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:32,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483587729] [2023-11-26 11:47:32,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483587729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:32,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513148482] [2023-11-26 11:47:32,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:32,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:32,663 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:32,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:47:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:32,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:47:32,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:32,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:47:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:32,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:32,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513148482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:32,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:32,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-26 11:47:32,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897354795] [2023-11-26 11:47:32,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:32,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:47:32,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:32,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:47:32,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:47:33,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 85 [2023-11-26 11:47:33,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 160 flow. Second operand has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 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) [2023-11-26 11:47:33,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:33,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 85 [2023-11-26 11:47:33,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:34,061 INFO L124 PetriNetUnfolderBase]: 2512/5370 cut-off events. [2023-11-26 11:47:34,061 INFO L125 PetriNetUnfolderBase]: For 355/355 co-relation queries the response was YES. [2023-11-26 11:47:34,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9669 conditions, 5370 events. 2512/5370 cut-off events. For 355/355 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 42351 event pairs, 161 based on Foata normal form. 120/5335 useless extension candidates. Maximal degree in co-relation 973. Up to 2919 conditions per place. [2023-11-26 11:47:34,105 INFO L140 encePairwiseOnDemand]: 81/85 looper letters, 83 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-11-26 11:47:34,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 114 transitions, 428 flow [2023-11-26 11:47:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:47:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:47:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2023-11-26 11:47:34,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529411764705883 [2023-11-26 11:47:34,111 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 235 transitions. [2023-11-26 11:47:34,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 235 transitions. [2023-11-26 11:47:34,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:34,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 235 transitions. [2023-11-26 11:47:34,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2023-11-26 11:47:34,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 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) [2023-11-26 11:47:34,115 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 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) [2023-11-26 11:47:34,115 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 160 flow. Second operand 5 states and 235 transitions. [2023-11-26 11:47:34,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 114 transitions, 428 flow [2023-11-26 11:47:34,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 426 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:47:34,120 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 162 flow [2023-11-26 11:47:34,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=85, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2023-11-26 11:47:34,121 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2023-11-26 11:47:34,122 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 162 flow [2023-11-26 11:47:34,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.428571428571427) internal successors, (220), 7 states have internal predecessors, (220), 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) [2023-11-26 11:47:34,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:34,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-26 11:47:34,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:47:34,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:34,330 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)] === [2023-11-26 11:47:34,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:34,330 INFO L85 PathProgramCache]: Analyzing trace with hash 586027551, now seen corresponding path program 1 times [2023-11-26 11:47:34,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:34,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851148236] [2023-11-26 11:47:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:34,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:47:34,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:47:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:47:34,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:47:34,372 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 11:47:34,373 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-26 11:47:34,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-26 11:47:34,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-26 11:47:34,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-26 11:47:34,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-26 11:47:34,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-26 11:47:34,374 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-26 11:47:34,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 11:47:34,374 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 11:47:34,375 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 11:47:34,375 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-26 11:47:34,404 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 11:47:34,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 110 transitions, 247 flow [2023-11-26 11:47:34,436 INFO L124 PetriNetUnfolderBase]: 42/248 cut-off events. [2023-11-26 11:47:34,436 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-26 11:47:34,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 248 events. 42/248 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1122 event pairs, 1 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 170. Up to 12 conditions per place. [2023-11-26 11:47:34,438 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 110 transitions, 247 flow [2023-11-26 11:47:34,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 110 transitions, 247 flow [2023-11-26 11:47:34,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:47:34,443 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=PETRI_NET, 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;@3d692627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:47:34,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 11:47:34,445 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:47:34,445 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 11:47:34,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:47:34,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:34,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:47:34,445 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)] === [2023-11-26 11:47:34,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 549682, now seen corresponding path program 1 times [2023-11-26 11:47:34,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:34,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878607318] [2023-11-26 11:47:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:34,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:34,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:34,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878607318] [2023-11-26 11:47:34,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878607318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:34,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:34,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:47:34,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991153775] [2023-11-26 11:47:34,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:34,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:34,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:34,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:34,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:34,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 110 [2023-11-26 11:47:34,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 110 transitions, 247 flow. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-26 11:47:34,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:34,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 110 [2023-11-26 11:47:34,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:46,438 INFO L124 PetriNetUnfolderBase]: 47447/78707 cut-off events. [2023-11-26 11:47:46,438 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2023-11-26 11:47:46,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145940 conditions, 78707 events. 47447/78707 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 2012. Compared 707225 event pairs, 40780 based on Foata normal form. 23856/99464 useless extension candidates. Maximal degree in co-relation 53254. Up to 57237 conditions per place. [2023-11-26 11:47:47,288 INFO L140 encePairwiseOnDemand]: 84/110 looper letters, 74 selfloop transitions, 2 changer transitions 1/112 dead transitions. [2023-11-26 11:47:47,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 405 flow [2023-11-26 11:47:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:47,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:47,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2023-11-26 11:47:47,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6787878787878788 [2023-11-26 11:47:47,291 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2023-11-26 11:47:47,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2023-11-26 11:47:47,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:47,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2023-11-26 11:47:47,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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) [2023-11-26 11:47:47,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-11-26 11:47:47,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-11-26 11:47:47,297 INFO L175 Difference]: Start difference. First operand has 92 places, 110 transitions, 247 flow. Second operand 3 states and 224 transitions. [2023-11-26 11:47:47,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 405 flow [2023-11-26 11:47:47,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 112 transitions, 405 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:47:47,305 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 199 flow [2023-11-26 11:47:47,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2023-11-26 11:47:47,306 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2023-11-26 11:47:47,307 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 199 flow [2023-11-26 11:47:47,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-11-26 11:47:47,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:47,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:47:47,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 11:47:47,308 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)] === [2023-11-26 11:47:47,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash 549683, now seen corresponding path program 1 times [2023-11-26 11:47:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:47,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307450362] [2023-11-26 11:47:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:47,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:47,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:47,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307450362] [2023-11-26 11:47:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307450362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:47:47,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:47:47,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:47:47,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560632951] [2023-11-26 11:47:47,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:47:47,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:47:47,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:47:47,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:47:47,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 110 [2023-11-26 11:47:47,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-26 11:47:47,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:47,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 110 [2023-11-26 11:47:47,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:47:55,270 INFO L124 PetriNetUnfolderBase]: 40912/69720 cut-off events. [2023-11-26 11:47:55,270 INFO L125 PetriNetUnfolderBase]: For 2450/2450 co-relation queries the response was YES. [2023-11-26 11:47:55,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129080 conditions, 69720 events. 40912/69720 cut-off events. For 2450/2450 co-relation queries the response was YES. Maximal size of possible extension queue 1877. Compared 637392 event pairs, 26434 based on Foata normal form. 1/66891 useless extension candidates. Maximal degree in co-relation 117413. Up to 57216 conditions per place. [2023-11-26 11:47:55,727 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 57 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2023-11-26 11:47:55,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 95 transitions, 339 flow [2023-11-26 11:47:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:47:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:47:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-11-26 11:47:55,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2023-11-26 11:47:55,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-11-26 11:47:55,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-11-26 11:47:55,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:47:55,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-11-26 11:47:55,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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) [2023-11-26 11:47:55,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-11-26 11:47:55,732 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-11-26 11:47:55,733 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 199 flow. Second operand 3 states and 175 transitions. [2023-11-26 11:47:55,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 95 transitions, 339 flow [2023-11-26 11:47:56,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 95 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 11:47:56,126 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 209 flow [2023-11-26 11:47:56,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2023-11-26 11:47:56,127 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2023-11-26 11:47:56,128 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 209 flow [2023-11-26 11:47:56,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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) [2023-11-26 11:47:56,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:47:56,128 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 11:47:56,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:47:56,129 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)] === [2023-11-26 11:47:56,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:47:56,129 INFO L85 PathProgramCache]: Analyzing trace with hash 854692397, now seen corresponding path program 1 times [2023-11-26 11:47:56,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:47:56,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713192037] [2023-11-26 11:47:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:56,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:47:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:56,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:47:56,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713192037] [2023-11-26 11:47:56,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713192037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:47:56,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920905900] [2023-11-26 11:47:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:47:56,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:47:56,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:47:56,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:47:56,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:47:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:47:56,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 11:47:56,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:47:56,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:47:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:56,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:47:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:47:56,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920905900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:47:56,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:47:56,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-11-26 11:47:56,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720511507] [2023-11-26 11:47:56,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:47:56,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:47:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:47:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:47:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:47:56,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 110 [2023-11-26 11:47:56,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 209 flow. Second operand has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 states have internal predecessors, (276), 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) [2023-11-26 11:47:56,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:47:56,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 110 [2023-11-26 11:47:56,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:48:04,280 INFO L124 PetriNetUnfolderBase]: 40830/70861 cut-off events. [2023-11-26 11:48:04,280 INFO L125 PetriNetUnfolderBase]: For 4578/4578 co-relation queries the response was YES. [2023-11-26 11:48:04,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130950 conditions, 70861 events. 40830/70861 cut-off events. For 4578/4578 co-relation queries the response was YES. Maximal size of possible extension queue 1997. Compared 669951 event pairs, 9875 based on Foata normal form. 1120/70423 useless extension candidates. Maximal degree in co-relation 13145. Up to 42067 conditions per place. [2023-11-26 11:48:04,752 INFO L140 encePairwiseOnDemand]: 106/110 looper letters, 132 selfloop transitions, 6 changer transitions 0/173 dead transitions. [2023-11-26 11:48:04,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 173 transitions, 663 flow [2023-11-26 11:48:04,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:48:04,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:48:04,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 364 transitions. [2023-11-26 11:48:04,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515151515151515 [2023-11-26 11:48:04,757 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 364 transitions. [2023-11-26 11:48:04,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 364 transitions. [2023-11-26 11:48:04,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:48:04,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 364 transitions. [2023-11-26 11:48:04,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.666666666666664) internal successors, (364), 6 states have internal predecessors, (364), 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) [2023-11-26 11:48:04,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 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) [2023-11-26 11:48:04,762 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 110.0) internal successors, (770), 7 states have internal predecessors, (770), 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) [2023-11-26 11:48:04,762 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 209 flow. Second operand 6 states and 364 transitions. [2023-11-26 11:48:04,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 173 transitions, 663 flow [2023-11-26 11:48:04,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 173 transitions, 661 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:48:04,772 INFO L231 Difference]: Finished difference. Result has 94 places, 86 transitions, 223 flow [2023-11-26 11:48:04,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=94, PETRI_TRANSITIONS=86} [2023-11-26 11:48:04,773 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2023-11-26 11:48:04,774 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 86 transitions, 223 flow [2023-11-26 11:48:04,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.42857142857143) internal successors, (276), 7 states have internal predecessors, (276), 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) [2023-11-26 11:48:04,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:04,774 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-26 11:48:04,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:48:04,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65477162-97be-44bc-bbe2-9b1eacde2160/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:48:04,986 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)] === [2023-11-26 11:48:04,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash -450659540, now seen corresponding path program 1 times [2023-11-26 11:48:04,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:04,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103444432] [2023-11-26 11:48:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:04,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:48:05,015 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:48:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:48:05,048 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:48:05,048 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 11:48:05,048 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-26 11:48:05,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-26 11:48:05,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-26 11:48:05,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-26 11:48:05,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-26 11:48:05,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-26 11:48:05,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-26 11:48:05,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 11:48:05,050 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 11:48:05,051 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 11:48:05,052 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-26 11:48:05,098 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-26 11:48:05,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 135 transitions, 310 flow [2023-11-26 11:48:05,155 INFO L124 PetriNetUnfolderBase]: 65/381 cut-off events. [2023-11-26 11:48:05,155 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-26 11:48:05,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 381 events. 65/381 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1869 event pairs, 6 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 272. Up to 32 conditions per place. [2023-11-26 11:48:05,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 135 transitions, 310 flow [2023-11-26 11:48:05,165 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 135 transitions, 310 flow [2023-11-26 11:48:05,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:48:05,167 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=PETRI_NET, 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;@3d692627, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:48:05,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 11:48:05,169 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:48:05,169 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 11:48:05,169 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 11:48:05,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:48:05,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 11:48:05,170 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)] === [2023-11-26 11:48:05,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:48:05,171 INFO L85 PathProgramCache]: Analyzing trace with hash 683737, now seen corresponding path program 1 times [2023-11-26 11:48:05,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:48:05,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572071749] [2023-11-26 11:48:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:48:05,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:48:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:48:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:48:05,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:48:05,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572071749] [2023-11-26 11:48:05,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572071749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:48:05,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:48:05,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 11:48:05,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421454626] [2023-11-26 11:48:05,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:48:05,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:48:05,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:48:05,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:48:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:48:05,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 135 [2023-11-26 11:48:05,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 135 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 44.0) internal successors, (132), 3 states have internal predecessors, (132), 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) [2023-11-26 11:48:05,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:48:05,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 135 [2023-11-26 11:48:05,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand