./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/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_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/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_90d3e58f-29e8-450a-823e-0cdfb2503d64/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 ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:43:56,411 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:43:56,547 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 10:43:56,555 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:43:56,556 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:43:56,598 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:43:56,599 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:43:56,600 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:43:56,601 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:43:56,607 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:43:56,607 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:43:56,609 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:43:56,610 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:43:56,612 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:43:56,612 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:43:56,613 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:43:56,614 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:43:56,614 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:43:56,615 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:43:56,615 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:43:56,616 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:43:56,617 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:43:56,617 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:43:56,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:43:56,634 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:43:56,634 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:43:56,635 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:43:56,635 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:43:56,636 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:43:56,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:43:56,637 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:43:56,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:43:56,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:43:56,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:43:56,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:43:56,640 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:43:56,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:43:56,641 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:43:56,641 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:43:56,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:43:56,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:43:56,642 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_90d3e58f-29e8-450a-823e-0cdfb2503d64/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 [2023-11-26 10:43:56,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:43:57,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:43:57,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:43:57,006 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:43:57,007 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:43:57,009 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-11-26 10:44:00,528 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:44:00,843 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:44:00,843 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-11-26 10:44:00,862 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/data/5b6fec61d/0f73a05e81dc4b37addd1d23f95a496d/FLAGea272f7e6 [2023-11-26 10:44:00,894 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/data/5b6fec61d/0f73a05e81dc4b37addd1d23f95a496d [2023-11-26 10:44:00,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:44:00,898 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:44:00,900 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:00,900 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:44:00,905 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:44:00,906 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:00" (1/1) ... [2023-11-26 10:44:00,907 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166fed4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:00, skipping insertion in model container [2023-11-26 10:44:00,908 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:44:00" (1/1) ... [2023-11-26 10:44:00,951 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:44:01,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:01,411 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:44:01,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:44:01,516 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:44:01,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01 WrapperNode [2023-11-26 10:44:01,517 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:44:01,519 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:01,519 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:44:01,520 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:44:01,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,563 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,610 INFO L138 Inliner]: procedures = 171, calls = 44, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 174 [2023-11-26 10:44:01,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:44:01,612 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:44:01,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:44:01,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:44:01,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,643 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,664 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2023-11-26 10:44:01,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,679 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,682 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,684 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,688 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:44:01,690 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:44:01,690 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:44:01,690 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:44:01,691 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (1/1) ... [2023-11-26 10:44:01,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:44:01,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:01,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:44:01,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:44:01,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:44:01,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:44:01,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:44:01,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:44:01,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:44:01,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:44:01,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:44:01,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:44:01,800 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-26 10:44:01,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:44:01,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:44:01,801 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-26 10:44:01,803 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-26 10:44:01,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:44:01,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:44:01,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:44:01,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:44:01,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:44:01,805 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-26 10:44:01,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:44:01,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:44:01,811 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 10:44:02,053 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:44:02,056 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:44:02,431 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:44:02,653 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:44:02,661 INFO L309 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-26 10:44:02,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:02 BoogieIcfgContainer [2023-11-26 10:44:02,664 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:44:02,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:44:02,668 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:44:02,671 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:44:02,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:44:00" (1/3) ... [2023-11-26 10:44:02,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55110beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:02, skipping insertion in model container [2023-11-26 10:44:02,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:44:01" (2/3) ... [2023-11-26 10:44:02,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55110beb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:44:02, skipping insertion in model container [2023-11-26 10:44:02,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:44:02" (3/3) ... [2023-11-26 10:44:02,678 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-11-26 10:44:02,701 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:44:02,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-11-26 10:44:02,702 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:44:02,776 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-26 10:44:02,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 98 transitions, 203 flow [2023-11-26 10:44:02,900 INFO L124 PetriNetUnfolderBase]: 32/147 cut-off events. [2023-11-26 10:44:02,900 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:44:02,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 147 events. 32/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 650 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 93. Up to 6 conditions per place. [2023-11-26 10:44:02,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 79 places, 98 transitions, 203 flow [2023-11-26 10:44:02,915 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 98 transitions, 203 flow [2023-11-26 10:44:02,927 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:02,936 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;@527586c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:02,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-26 10:44:02,942 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:02,942 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:44:02,943 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:44:02,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:02,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:44:02,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-26 10:44:02,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:02,951 INFO L85 PathProgramCache]: Analyzing trace with hash 477627, now seen corresponding path program 1 times [2023-11-26 10:44:02,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:02,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457329843] [2023-11-26 10:44:02,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:02,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:03,259 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 10:44:03,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:03,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457329843] [2023-11-26 10:44:03,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457329843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:03,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:03,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:44:03,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068900093] [2023-11-26 10:44:03,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:03,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:03,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:03,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:03,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:03,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 98 [2023-11-26 10:44:03,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 98 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 10:44:03,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:03,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 98 [2023-11-26 10:44:03,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:03,910 INFO L124 PetriNetUnfolderBase]: 338/1050 cut-off events. [2023-11-26 10:44:03,911 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-26 10:44:03,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1757 conditions, 1050 events. 338/1050 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 6601 event pairs, 285 based on Foata normal form. 266/1277 useless extension candidates. Maximal degree in co-relation 1682. Up to 635 conditions per place. [2023-11-26 10:44:03,930 INFO L140 encePairwiseOnDemand]: 74/98 looper letters, 53 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-11-26 10:44:03,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 295 flow [2023-11-26 10:44:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-11-26 10:44:03,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-11-26 10:44:03,952 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-11-26 10:44:03,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-11-26 10:44:03,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:03,958 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-11-26 10:44:03,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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 10:44:03,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 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 10:44:03,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 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 10:44:03,976 INFO L175 Difference]: Start difference. First operand has 79 places, 98 transitions, 203 flow. Second operand 3 states and 189 transitions. [2023-11-26 10:44:03,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 295 flow [2023-11-26 10:44:03,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 295 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:44:03,992 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 159 flow [2023-11-26 10:44:03,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-11-26 10:44:04,000 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -2 predicate places. [2023-11-26 10:44:04,001 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 159 flow [2023-11-26 10:44:04,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 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 10:44:04,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:04,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:44:04,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:44:04,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-26 10:44:04,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:04,004 INFO L85 PathProgramCache]: Analyzing trace with hash 477628, now seen corresponding path program 1 times [2023-11-26 10:44:04,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:04,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640304525] [2023-11-26 10:44:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:04,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:04,290 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 10:44:04,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:04,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640304525] [2023-11-26 10:44:04,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640304525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:04,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:04,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:44:04,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709328449] [2023-11-26 10:44:04,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:04,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:04,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:04,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:04,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:04,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 98 [2023-11-26 10:44:04,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 10:44:04,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:04,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 98 [2023-11-26 10:44:04,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:04,605 INFO L124 PetriNetUnfolderBase]: 301/952 cut-off events. [2023-11-26 10:44:04,605 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-26 10:44:04,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 952 events. 301/952 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 6052 event pairs, 0 based on Foata normal form. 1/909 useless extension candidates. Maximal degree in co-relation 1575. Up to 625 conditions per place. [2023-11-26 10:44:04,615 INFO L140 encePairwiseOnDemand]: 94/98 looper letters, 53 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-11-26 10:44:04,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 90 transitions, 301 flow [2023-11-26 10:44:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-11-26 10:44:04,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-26 10:44:04,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-11-26 10:44:04,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-11-26 10:44:04,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:04,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-11-26 10:44:04,628 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 10:44:04,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 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 10:44:04,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 98.0) internal successors, (392), 4 states have internal predecessors, (392), 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 10:44:04,632 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 159 flow. Second operand 3 states and 168 transitions. [2023-11-26 10:44:04,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 90 transitions, 301 flow [2023-11-26 10:44:04,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:44:04,646 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 165 flow [2023-11-26 10:44:04,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2023-11-26 10:44:04,648 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -1 predicate places. [2023-11-26 10:44:04,649 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 165 flow [2023-11-26 10:44:04,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 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 10:44:04,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:04,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 10:44:04,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:44:04,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-26 10:44:04,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:04,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1267158416, now seen corresponding path program 1 times [2023-11-26 10:44:04,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:04,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737403454] [2023-11-26 10:44:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:04,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:05,026 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 10:44:05,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:05,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737403454] [2023-11-26 10:44:05,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737403454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:05,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223802584] [2023-11-26 10:44:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:05,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:05,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:05,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:05,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:44:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:05,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:44:05,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:05,245 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 10:44:05,334 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 10:44:05,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:05,428 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 10:44:05,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223802584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:05,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:05,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-26 10:44:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638848409] [2023-11-26 10:44:05,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:44:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:44:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:05,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 98 [2023-11-26 10:44:05,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 165 flow. Second operand has 9 states, 9 states have (on average 38.333333333333336) internal successors, (345), 9 states have internal predecessors, (345), 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 10:44:05,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:05,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 98 [2023-11-26 10:44:05,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:05,685 INFO L124 PetriNetUnfolderBase]: 49/169 cut-off events. [2023-11-26 10:44:05,685 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-11-26 10:44:05,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 169 events. 49/169 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 636 event pairs, 28 based on Foata normal form. 32/196 useless extension candidates. Maximal degree in co-relation 300. Up to 93 conditions per place. [2023-11-26 10:44:05,688 INFO L140 encePairwiseOnDemand]: 94/98 looper letters, 35 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-26 10:44:05,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 55 transitions, 194 flow [2023-11-26 10:44:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:44:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 10:44:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 183 transitions. [2023-11-26 10:44:05,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46683673469387754 [2023-11-26 10:44:05,691 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 183 transitions. [2023-11-26 10:44:05,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 183 transitions. [2023-11-26 10:44:05,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:05,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 183 transitions. [2023-11-26 10:44:05,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 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 10:44:05,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 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 10:44:05,696 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 98.0) internal successors, (490), 5 states have internal predecessors, (490), 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 10:44:05,697 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 165 flow. Second operand 4 states and 183 transitions. [2023-11-26 10:44:05,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 55 transitions, 194 flow [2023-11-26 10:44:05,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 10:44:05,700 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 84 flow [2023-11-26 10:44:05,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-26 10:44:05,701 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -36 predicate places. [2023-11-26 10:44:05,702 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 84 flow [2023-11-26 10:44:05,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 38.333333333333336) internal successors, (345), 9 states have internal predecessors, (345), 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 10:44:05,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:05,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-26 10:44:05,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:05,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-26 10:44:05,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-26 10:44:05,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:05,910 INFO L85 PathProgramCache]: Analyzing trace with hash -627204745, now seen corresponding path program 1 times [2023-11-26 10:44:05,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:05,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162463430] [2023-11-26 10:44:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:05,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:05,935 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:44:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:05,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:44:05,979 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:44:05,981 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-26 10:44:05,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-11-26 10:44:05,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-26 10:44:05,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-26 10:44:05,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-11-26 10:44:05,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-26 10:44:05,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-26 10:44:05,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-26 10:44:05,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-26 10:44:05,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:44:05,987 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 10:44:05,991 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:44:05,991 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-26 10:44:06,070 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 10:44:06,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 143 transitions, 302 flow [2023-11-26 10:44:06,119 INFO L124 PetriNetUnfolderBase]: 55/253 cut-off events. [2023-11-26 10:44:06,120 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-26 10:44:06,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 253 events. 55/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1242 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2023-11-26 10:44:06,124 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 143 transitions, 302 flow [2023-11-26 10:44:06,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 143 transitions, 302 flow [2023-11-26 10:44:06,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:06,135 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;@527586c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:06,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-26 10:44:06,138 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:06,138 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:44:06,138 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:44:06,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:06,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:44:06,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-26 10:44:06,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:06,139 INFO L85 PathProgramCache]: Analyzing trace with hash 619626, now seen corresponding path program 1 times [2023-11-26 10:44:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:06,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504886678] [2023-11-26 10:44:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:06,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:06,199 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 10:44:06,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:06,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504886678] [2023-11-26 10:44:06,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504886678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:06,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:06,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:44:06,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077117375] [2023-11-26 10:44:06,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:06,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:06,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:06,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:06,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 143 [2023-11-26 10:44:06,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 143 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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 10:44:06,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:06,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 143 [2023-11-26 10:44:06,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:10,556 INFO L124 PetriNetUnfolderBase]: 11475/23376 cut-off events. [2023-11-26 10:44:10,557 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-26 10:44:10,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40793 conditions, 23376 events. 11475/23376 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 220164 event pairs, 9705 based on Foata normal form. 6815/29358 useless extension candidates. Maximal degree in co-relation 16441. Up to 15663 conditions per place. [2023-11-26 10:44:10,797 INFO L140 encePairwiseOnDemand]: 109/143 looper letters, 85 selfloop transitions, 2 changer transitions 0/138 dead transitions. [2023-11-26 10:44:10,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 138 transitions, 466 flow [2023-11-26 10:44:10,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-11-26 10:44:10,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6806526806526807 [2023-11-26 10:44:10,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-11-26 10:44:10,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-11-26 10:44:10,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:10,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-11-26 10:44:10,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 10:44:10,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 10:44:10,807 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 10:44:10,807 INFO L175 Difference]: Start difference. First operand has 114 places, 143 transitions, 302 flow. Second operand 3 states and 292 transitions. [2023-11-26 10:44:10,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 138 transitions, 466 flow [2023-11-26 10:44:10,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 138 transitions, 466 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:44:10,819 INFO L231 Difference]: Finished difference. Result has 111 places, 108 transitions, 236 flow [2023-11-26 10:44:10,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=111, PETRI_TRANSITIONS=108} [2023-11-26 10:44:10,822 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2023-11-26 10:44:10,822 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 108 transitions, 236 flow [2023-11-26 10:44:10,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 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 10:44:10,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:10,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:44:10,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:44:10,824 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-26 10:44:10,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:10,825 INFO L85 PathProgramCache]: Analyzing trace with hash 619627, now seen corresponding path program 1 times [2023-11-26 10:44:10,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:10,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950000517] [2023-11-26 10:44:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:10,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:10,944 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 10:44:10,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:10,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950000517] [2023-11-26 10:44:10,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950000517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:10,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:10,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:44:10,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852985685] [2023-11-26 10:44:10,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:10,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:10,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:10,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 143 [2023-11-26 10:44:10,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 108 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 10:44:10,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:10,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 143 [2023-11-26 10:44:10,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:14,238 INFO L124 PetriNetUnfolderBase]: 10573/22136 cut-off events. [2023-11-26 10:44:14,239 INFO L125 PetriNetUnfolderBase]: For 231/231 co-relation queries the response was YES. [2023-11-26 10:44:14,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38709 conditions, 22136 events. 10573/22136 cut-off events. For 231/231 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 211568 event pairs, 4860 based on Foata normal form. 1/21229 useless extension candidates. Maximal degree in co-relation 34859. Up to 16177 conditions per place. [2023-11-26 10:44:14,656 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 71 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-11-26 10:44:14,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 125 transitions, 416 flow [2023-11-26 10:44:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:44:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:44:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-11-26 10:44:14,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5524475524475524 [2023-11-26 10:44:14,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-11-26 10:44:14,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-11-26 10:44:14,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:14,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-11-26 10:44:14,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 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 10:44:14,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 10:44:14,665 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 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 10:44:14,665 INFO L175 Difference]: Start difference. First operand has 111 places, 108 transitions, 236 flow. Second operand 3 states and 237 transitions. [2023-11-26 10:44:14,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 125 transitions, 416 flow [2023-11-26 10:44:14,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 125 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:44:14,759 INFO L231 Difference]: Finished difference. Result has 112 places, 109 transitions, 246 flow [2023-11-26 10:44:14,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=112, PETRI_TRANSITIONS=109} [2023-11-26 10:44:14,764 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, -2 predicate places. [2023-11-26 10:44:14,764 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 109 transitions, 246 flow [2023-11-26 10:44:14,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 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 10:44:14,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:14,765 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-26 10:44:14,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:44:14,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-26 10:44:14,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1028564308, now seen corresponding path program 1 times [2023-11-26 10:44:14,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:14,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849273962] [2023-11-26 10:44:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:14,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:14,978 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 10:44:14,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:14,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849273962] [2023-11-26 10:44:14,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849273962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:44:14,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811016591] [2023-11-26 10:44:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:14,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:14,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:44:14,981 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:44:15,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:44:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:15,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:44:15,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:44:15,135 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 10:44:15,237 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 10:44:15,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:44:15,347 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 10:44:15,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811016591] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:44:15,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:44:15,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-26 10:44:15,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229628451] [2023-11-26 10:44:15,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:44:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-26 10:44:15,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-26 10:44:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-26 10:44:15,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 143 [2023-11-26 10:44:15,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 109 transitions, 246 flow. Second operand has 9 states, 9 states have (on average 55.333333333333336) internal successors, (498), 9 states have internal predecessors, (498), 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 10:44:15,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:15,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 143 [2023-11-26 10:44:15,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:44:16,123 INFO L124 PetriNetUnfolderBase]: 1800/3458 cut-off events. [2023-11-26 10:44:16,123 INFO L125 PetriNetUnfolderBase]: For 590/590 co-relation queries the response was YES. [2023-11-26 10:44:16,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6671 conditions, 3458 events. 1800/3458 cut-off events. For 590/590 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 25687 event pairs, 270 based on Foata normal form. 544/3870 useless extension candidates. Maximal degree in co-relation 6544. Up to 2247 conditions per place. [2023-11-26 10:44:16,158 INFO L140 encePairwiseOnDemand]: 139/143 looper letters, 83 selfloop transitions, 3 changer transitions 0/121 dead transitions. [2023-11-26 10:44:16,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 121 transitions, 432 flow [2023-11-26 10:44:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:44:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:44:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 355 transitions. [2023-11-26 10:44:16,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965034965034965 [2023-11-26 10:44:16,161 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 355 transitions. [2023-11-26 10:44:16,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 355 transitions. [2023-11-26 10:44:16,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:44:16,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 355 transitions. [2023-11-26 10:44:16,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 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 10:44:16,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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 10:44:16,168 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 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 10:44:16,169 INFO L175 Difference]: Start difference. First operand has 112 places, 109 transitions, 246 flow. Second operand 5 states and 355 transitions. [2023-11-26 10:44:16,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 121 transitions, 432 flow [2023-11-26 10:44:16,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 121 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:44:16,175 INFO L231 Difference]: Finished difference. Result has 80 places, 72 transitions, 166 flow [2023-11-26 10:44:16,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=143, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=80, PETRI_TRANSITIONS=72} [2023-11-26 10:44:16,178 INFO L281 CegarLoopForPetriNet]: 114 programPoint places, -34 predicate places. [2023-11-26 10:44:16,178 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 72 transitions, 166 flow [2023-11-26 10:44:16,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 55.333333333333336) internal successors, (498), 9 states have internal predecessors, (498), 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 10:44:16,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:16,179 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-26 10:44:16,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:44:16,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90d3e58f-29e8-450a-823e-0cdfb2503d64/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:44:16,387 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-26 10:44:16,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash 681973765, now seen corresponding path program 1 times [2023-11-26 10:44:16,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:16,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846622969] [2023-11-26 10:44:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:16,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:16,483 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 10:44:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 10:44:16,511 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 10:44:16,512 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 10:44:16,512 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-26 10:44:16,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-26 10:44:16,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-26 10:44:16,515 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-26 10:44:16,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-26 10:44:16,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2023-11-26 10:44:16,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-26 10:44:16,516 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2023-11-26 10:44:16,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2023-11-26 10:44:16,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-26 10:44:16,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:44:16,517 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-26 10:44:16,520 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-26 10:44:16,520 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-26 10:44:16,592 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:44:16,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 188 transitions, 403 flow [2023-11-26 10:44:16,654 INFO L124 PetriNetUnfolderBase]: 81/380 cut-off events. [2023-11-26 10:44:16,655 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-26 10:44:16,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 380 events. 81/380 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1982 event pairs, 1 based on Foata normal form. 0/256 useless extension candidates. Maximal degree in co-relation 264. Up to 12 conditions per place. [2023-11-26 10:44:16,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 188 transitions, 403 flow [2023-11-26 10:44:16,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 188 transitions, 403 flow [2023-11-26 10:44:16,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:44:16,671 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;@527586c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:44:16,672 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-26 10:44:16,674 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:44:16,674 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-26 10:44:16,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-26 10:44:16,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:44:16,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-26 10:44:16,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-26 10:44:16,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:44:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash 806310, now seen corresponding path program 1 times [2023-11-26 10:44:16,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:44:16,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746315012] [2023-11-26 10:44:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:44:16,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:44:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:44:16,719 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 10:44:16,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:44:16,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746315012] [2023-11-26 10:44:16,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746315012] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:44:16,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:44:16,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:44:16,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420147064] [2023-11-26 10:44:16,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:44:16,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:44:16,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:44:16,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:44:16,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:44:16,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 188 [2023-11-26 10:44:16,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 188 transitions, 403 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 10:44:16,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:44:16,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 188 [2023-11-26 10:44:16,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand