./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/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_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:45:35,325 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:45:35,398 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:45:35,404 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:45:35,404 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:45:35,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:45:35,431 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:45:35,431 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:45:35,432 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:45:35,433 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:45:35,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:45:35,434 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:45:35,435 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:45:35,436 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:45:35,436 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:45:35,437 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:45:35,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:45:35,438 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:45:35,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:45:35,439 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:45:35,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:45:35,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:45:35,441 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:45:35,442 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:45:35,443 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:45:35,443 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:45:35,444 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:45:35,444 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:45:35,445 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:45:35,446 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:45:35,446 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:45:35,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:45:35,447 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:45:35,448 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:45:35,448 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:45:35,449 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:45:35,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:45:35,449 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:45:35,450 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:45:35,450 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:45:35,451 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:45:35,451 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:45:35,451 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_2ed13855-a239-476e-b0ef-0637402a593f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 [2023-11-26 11:45:35,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:45:35,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:45:35,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:45:35,817 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:45:35,819 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:45:35,821 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-26 11:45:39,087 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:45:39,338 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:45:39,340 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-11-26 11:45:39,353 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/data/c5d918a5a/5e7dbefed45b4f5dab7041645e297762/FLAGe39dc130f [2023-11-26 11:45:39,371 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/data/c5d918a5a/5e7dbefed45b4f5dab7041645e297762 [2023-11-26 11:45:39,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:45:39,381 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:45:39,383 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:39,384 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:45:39,389 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:45:39,390 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,391 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548b94d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39, skipping insertion in model container [2023-11-26 11:45:39,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,425 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:45:39,645 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2454,2467] [2023-11-26 11:45:39,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:39,670 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:45:39,694 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c[2454,2467] [2023-11-26 11:45:39,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:45:39,711 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:45:39,711 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:45:39,720 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:45:39,721 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39 WrapperNode [2023-11-26 11:45:39,721 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:45:39,722 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:39,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:45:39,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:45:39,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,740 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,775 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 150 [2023-11-26 11:45:39,775 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:45:39,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:45:39,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:45:39,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:45:39,793 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,797 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,812 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 2, 3]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 11:45:39,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,822 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,826 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,828 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,830 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,834 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:45:39,835 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:45:39,836 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:45:39,836 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:45:39,852 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (1/1) ... [2023-11-26 11:45:39,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:45:39,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:39,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:45:39,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:45:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:45:39,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:45:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:45:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:45:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:45:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:45:39,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:45:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:45:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:45:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:45:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:45:39,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:45:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:45:39,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:45:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:45:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:45:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:45:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:45:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:45:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:45:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:45:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:45:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:45:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:45:39,952 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:45:40,090 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:45:40,093 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:45:40,473 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:45:40,834 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:45:40,834 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:45:40,835 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:40 BoogieIcfgContainer [2023-11-26 11:45:40,835 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:45:40,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:45:40,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:45:40,842 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:45:40,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:45:39" (1/3) ... [2023-11-26 11:45:40,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbb1678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:40, skipping insertion in model container [2023-11-26 11:45:40,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:45:39" (2/3) ... [2023-11-26 11:45:40,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fbb1678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:45:40, skipping insertion in model container [2023-11-26 11:45:40,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:40" (3/3) ... [2023-11-26 11:45:40,846 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-11-26 11:45:40,854 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:45:40,863 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:45:40,863 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:45:40,864 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:45:40,915 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:45:40,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 27 transitions, 68 flow [2023-11-26 11:45:40,984 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2023-11-26 11:45:40,984 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:45:40,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 3/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-26 11:45:40,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 27 transitions, 68 flow [2023-11-26 11:45:40,991 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 24 transitions, 60 flow [2023-11-26 11:45:41,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:45:41,010 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5289e1c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:45:41,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:45:41,023 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:45:41,023 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-26 11:45:41,023 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:45:41,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:41,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:41,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:41,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash 745609022, now seen corresponding path program 1 times [2023-11-26 11:45:41,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:41,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172825929] [2023-11-26 11:45:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:41,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:41,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:41,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172825929] [2023-11-26 11:45:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172825929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:41,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:41,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:45:41,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049099354] [2023-11-26 11:45:41,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:41,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:45:41,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:41,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:45:41,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:45:41,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2023-11-26 11:45:41,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:41,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:41,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2023-11-26 11:45:41,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:41,749 INFO L124 PetriNetUnfolderBase]: 156/298 cut-off events. [2023-11-26 11:45:41,749 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-26 11:45:41,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 298 events. 156/298 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1132 event pairs, 45 based on Foata normal form. 1/297 useless extension candidates. Maximal degree in co-relation 502. Up to 179 conditions per place. [2023-11-26 11:45:41,759 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 31 selfloop transitions, 3 changer transitions 1/38 dead transitions. [2023-11-26 11:45:41,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 167 flow [2023-11-26 11:45:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:45:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:45:41,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2023-11-26 11:45:41,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2023-11-26 11:45:41,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 51 transitions. [2023-11-26 11:45:41,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 51 transitions. [2023-11-26 11:45:41,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:41,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 51 transitions. [2023-11-26 11:45:41,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:41,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:41,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:41,786 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 60 flow. Second operand 3 states and 51 transitions. [2023-11-26 11:45:41,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 167 flow [2023-11-26 11:45:41,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 153 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:45:41,793 INFO L231 Difference]: Finished difference. Result has 27 places, 26 transitions, 71 flow [2023-11-26 11:45:41,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2023-11-26 11:45:41,802 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2023-11-26 11:45:41,803 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 71 flow [2023-11-26 11:45:41,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:41,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:41,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:45:41,805 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:41,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1361035497, now seen corresponding path program 1 times [2023-11-26 11:45:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:41,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992882235] [2023-11-26 11:45:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:41,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:42,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:42,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992882235] [2023-11-26 11:45:42,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992882235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:42,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:42,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:42,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432894215] [2023-11-26 11:45:42,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:42,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:42,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:42,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2023-11-26 11:45:42,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 71 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:42,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2023-11-26 11:45:42,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:42,364 INFO L124 PetriNetUnfolderBase]: 221/447 cut-off events. [2023-11-26 11:45:42,365 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-26 11:45:42,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 915 conditions, 447 events. 221/447 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2056 event pairs, 153 based on Foata normal form. 0/414 useless extension candidates. Maximal degree in co-relation 406. Up to 261 conditions per place. [2023-11-26 11:45:42,371 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 38 selfloop transitions, 5 changer transitions 0/49 dead transitions. [2023-11-26 11:45:42,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 49 transitions, 210 flow [2023-11-26 11:45:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:45:42,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2023-11-26 11:45:42,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2023-11-26 11:45:42,374 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 74 transitions. [2023-11-26 11:45:42,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 74 transitions. [2023-11-26 11:45:42,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:42,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 74 transitions. [2023-11-26 11:45:42,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,377 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,377 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 71 flow. Second operand 5 states and 74 transitions. [2023-11-26 11:45:42,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 49 transitions, 210 flow [2023-11-26 11:45:42,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 49 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:42,380 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 104 flow [2023-11-26 11:45:42,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-11-26 11:45:42,381 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 5 predicate places. [2023-11-26 11:45:42,382 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 104 flow [2023-11-26 11:45:42,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:42,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:42,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:45:42,383 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:42,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1539120099, now seen corresponding path program 1 times [2023-11-26 11:45:42,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:42,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071429872] [2023-11-26 11:45:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:42,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:45:42,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:42,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071429872] [2023-11-26 11:45:42,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071429872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:42,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:42,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:45:42,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721277401] [2023-11-26 11:45:42,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:42,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:42,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:42,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:42,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 11:45:42,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2023-11-26 11:45:42,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:42,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2023-11-26 11:45:42,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:42,691 INFO L124 PetriNetUnfolderBase]: 181/356 cut-off events. [2023-11-26 11:45:42,691 INFO L125 PetriNetUnfolderBase]: For 89/107 co-relation queries the response was YES. [2023-11-26 11:45:42,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 356 events. 181/356 cut-off events. For 89/107 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1419 event pairs, 133 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 650. Up to 269 conditions per place. [2023-11-26 11:45:42,696 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 19 selfloop transitions, 2 changer transitions 17/44 dead transitions. [2023-11-26 11:45:42,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 221 flow [2023-11-26 11:45:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:45:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 69 transitions. [2023-11-26 11:45:42,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-11-26 11:45:42,702 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 69 transitions. [2023-11-26 11:45:42,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 69 transitions. [2023-11-26 11:45:42,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:42,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 69 transitions. [2023-11-26 11:45:42,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,706 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,707 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 104 flow. Second operand 5 states and 69 transitions. [2023-11-26 11:45:42,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 221 flow [2023-11-26 11:45:42,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 44 transitions, 217 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 11:45:42,711 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 92 flow [2023-11-26 11:45:42,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-11-26 11:45:42,714 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2023-11-26 11:45:42,714 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 92 flow [2023-11-26 11:45:42,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:42,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:42,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:42,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:45:42,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:42,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash -286812489, now seen corresponding path program 1 times [2023-11-26 11:45:42,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:42,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790112474] [2023-11-26 11:45:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:42,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:42,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790112474] [2023-11-26 11:45:42,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790112474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:42,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129100976] [2023-11-26 11:45:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:42,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:42,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:42,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:42,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:45:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:43,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:45:43,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:43,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:43,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129100976] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:43,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:43,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 11:45:43,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505091522] [2023-11-26 11:45:43,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:43,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:43,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:43,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:43,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:45:43,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2023-11-26 11:45:43,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:43,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:43,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2023-11-26 11:45:43,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:43,352 INFO L124 PetriNetUnfolderBase]: 154/296 cut-off events. [2023-11-26 11:45:43,352 INFO L125 PetriNetUnfolderBase]: For 64/82 co-relation queries the response was YES. [2023-11-26 11:45:43,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717 conditions, 296 events. 154/296 cut-off events. For 64/82 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1173 event pairs, 44 based on Foata normal form. 0/280 useless extension candidates. Maximal degree in co-relation 700. Up to 151 conditions per place. [2023-11-26 11:45:43,356 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 24 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-11-26 11:45:43,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 35 transitions, 173 flow [2023-11-26 11:45:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:45:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2023-11-26 11:45:43,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-26 11:45:43,358 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 60 transitions. [2023-11-26 11:45:43,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 60 transitions. [2023-11-26 11:45:43,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:43,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 60 transitions. [2023-11-26 11:45:43,360 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:43,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:43,361 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:43,361 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 92 flow. Second operand 5 states and 60 transitions. [2023-11-26 11:45:43,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 35 transitions, 173 flow [2023-11-26 11:45:43,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 149 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-26 11:45:43,365 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 97 flow [2023-11-26 11:45:43,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=97, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-26 11:45:43,366 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-11-26 11:45:43,366 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 97 flow [2023-11-26 11:45:43,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:43,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:43,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:43,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:43,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:43,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:43,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:43,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2110500781, now seen corresponding path program 1 times [2023-11-26 11:45:43,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:43,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740856382] [2023-11-26 11:45:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:43,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:43,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:43,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740856382] [2023-11-26 11:45:43,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740856382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:43,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593101457] [2023-11-26 11:45:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:43,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:43,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:43,743 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:43,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:45:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:43,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:45:43,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:43,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593101457] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:43,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:43,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-26 11:45:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784415790] [2023-11-26 11:45:43,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:43,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 11:45:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 11:45:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-26 11:45:43,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2023-11-26 11:45:43,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:43,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:45:43,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2023-11-26 11:45:43,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:45:44,102 INFO L124 PetriNetUnfolderBase]: 149/295 cut-off events. [2023-11-26 11:45:44,103 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-26 11:45:44,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 295 events. 149/295 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1076 event pairs, 49 based on Foata normal form. 0/282 useless extension candidates. Maximal degree in co-relation 688. Up to 139 conditions per place. [2023-11-26 11:45:44,106 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 24 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2023-11-26 11:45:44,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 182 flow [2023-11-26 11:45:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:45:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:45:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2023-11-26 11:45:44,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-26 11:45:44,108 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 60 transitions. [2023-11-26 11:45:44,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 60 transitions. [2023-11-26 11:45:44,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:45:44,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 60 transitions. [2023-11-26 11:45:44,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:44,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:44,110 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:44,110 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 97 flow. Second operand 5 states and 60 transitions. [2023-11-26 11:45:44,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 182 flow [2023-11-26 11:45:44,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-26 11:45:44,113 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 114 flow [2023-11-26 11:45:44,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-26 11:45:44,114 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 9 predicate places. [2023-11-26 11:45:44,114 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 114 flow [2023-11-26 11:45:44,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:45:44,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:45:44,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:44,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:44,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:44,322 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:45:44,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:44,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1868499776, now seen corresponding path program 1 times [2023-11-26 11:45:44,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:44,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300089082] [2023-11-26 11:45:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:44,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:45:44,354 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-26 11:45:44,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-26 11:45:44,412 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-26 11:45:44,413 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-26 11:45:44,414 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-26 11:45:44,418 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-26 11:45:44,421 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-26 11:45:44,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 11:45:44,422 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-26 11:45:44,428 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-26 11:45:44,428 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-26 11:45:44,489 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:45:44,491 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-11-26 11:45:44,491 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-11-26 11:45:44,493 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:45:44,494 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:45:44,494 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-11-26 11:45:44,495 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-11-26 11:45:44,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 11:45:44 BasicIcfg [2023-11-26 11:45:44,506 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-26 11:45:44,506 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-26 11:45:44,507 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-26 11:45:44,507 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-26 11:45:44,507 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:45:40" (3/4) ... [2023-11-26 11:45:44,508 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-26 11:45:44,525 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:45:44,525 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-11-26 11:45:44,526 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-11-26 11:45:44,527 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:45:44,528 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-26 11:45:44,528 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-11-26 11:45:44,529 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-11-26 11:45:44,570 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ed13855-a239-476e-b0ef-0637402a593f/bin/uautomizer-verify-VRDe98Ueme/witness.graphml [2023-11-26 11:45:44,571 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-26 11:45:44,571 INFO L158 Benchmark]: Toolchain (without parser) took 5190.15ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 97.0MB in the beginning and 122.8MB in the end (delta: -25.8MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2023-11-26 11:45:44,572 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 138.4MB. Free memory is still 110.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-26 11:45:44,572 INFO L158 Benchmark]: CACSL2BoogieTranslator took 338.23ms. Allocated memory is still 138.4MB. Free memory was 97.0MB in the beginning and 85.0MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-26 11:45:44,572 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.01ms. Allocated memory is still 138.4MB. Free memory was 85.0MB in the beginning and 82.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:45:44,573 INFO L158 Benchmark]: Boogie Preprocessor took 57.85ms. Allocated memory is still 138.4MB. Free memory was 82.9MB in the beginning and 80.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-26 11:45:44,573 INFO L158 Benchmark]: RCFGBuilder took 999.87ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 80.3MB in the beginning and 137.9MB in the end (delta: -57.5MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. [2023-11-26 11:45:44,574 INFO L158 Benchmark]: TraceAbstraction took 3668.02ms. Allocated memory is still 184.5MB. Free memory was 136.8MB in the beginning and 130.2MB in the end (delta: 6.6MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2023-11-26 11:45:44,574 INFO L158 Benchmark]: Witness Printer took 64.39ms. Allocated memory is still 184.5MB. Free memory was 130.2MB in the beginning and 122.8MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-26 11:45:44,576 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 138.4MB. Free memory is still 110.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 338.23ms. Allocated memory is still 138.4MB. Free memory was 97.0MB in the beginning and 85.0MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.01ms. Allocated memory is still 138.4MB. Free memory was 85.0MB in the beginning and 82.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.85ms. Allocated memory is still 138.4MB. Free memory was 82.9MB in the beginning and 80.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 999.87ms. Allocated memory was 138.4MB in the beginning and 184.5MB in the end (delta: 46.1MB). Free memory was 80.3MB in the beginning and 137.9MB in the end (delta: -57.5MB). Peak memory consumption was 36.7MB. Max. memory is 16.1GB. * TraceAbstraction took 3668.02ms. Allocated memory is still 184.5MB. Free memory was 136.8MB in the beginning and 130.2MB in the end (delta: 6.6MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Witness Printer took 64.39ms. Allocated memory is still 184.5MB. Free memory was 130.2MB in the beginning and 122.8MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-1:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-1:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-1:0}, N=1, counter=0, t1={3:0}, t2={5:0}] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-1:0}, N=1, counter=0, t1={3:0}, t2={5:0}] [L83] 0 \read(t1) VAL [A={-1:0}, N=1, counter=0] [L62] 2 int i=0; VAL [A={-1:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=0, i=0] [L62] COND TRUE 2 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L64] EXPR 2 A[i] [L64] CALL, EXPR 2 minus(counter, A[i]) [L104] CALL 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L54] 1 counter = tmp VAL [A={-1:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=7, i=0, tmp=7] [L49] 1 i++ VAL [A={-1:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=7, i=1, tmp=7] [L49] COND FALSE 1 !(i