./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-3.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_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI --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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:39:05,103 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:39:05,176 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:39:05,191 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:39:05,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:39:05,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:39:05,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:39:05,246 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:39:05,246 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:39:05,247 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:39:05,248 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:39:05,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:39:05,263 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:39:05,266 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:39:05,266 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:39:05,267 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:39:05,268 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:39:05,270 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:39:05,270 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:39:05,271 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:39:05,271 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:39:05,272 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:39:05,272 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:39:05,273 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:39:05,273 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:39:05,274 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:39:05,274 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:39:05,275 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:39:05,275 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:39:05,276 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:39:05,277 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:39:05,278 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:05,278 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:39:05,278 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:39:05,279 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:39:05,279 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:39:05,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:39:05,279 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:39:05,280 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:39:05,280 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:39:05,280 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:39:05,280 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:39:05,281 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_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2023-11-24 21:39:05,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:39:05,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:39:05,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:39:05,633 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:39:05,634 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:39:05,635 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2023-11-24 21:39:08,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:39:08,955 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:39:08,957 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/sv-benchmarks/c/weaver/unroll-3.wvr.c [2023-11-24 21:39:08,968 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/data/0a39941e8/7b343624498f45ae810bbd72ce048ca9/FLAGf819600f5 [2023-11-24 21:39:08,990 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/data/0a39941e8/7b343624498f45ae810bbd72ce048ca9 [2023-11-24 21:39:08,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:39:08,999 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:39:09,003 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:09,004 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:39:09,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:39:09,012 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:08" (1/1) ... [2023-11-24 21:39:09,035 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f50e202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09, skipping insertion in model container [2023-11-24 21:39:09,035 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:39:08" (1/1) ... [2023-11-24 21:39:09,070 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:39:09,310 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_27081ade-fda8-4859-87bf-d8a70d6afefc/sv-benchmarks/c/weaver/unroll-3.wvr.c[2526,2539] [2023-11-24 21:39:09,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:09,340 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:39:09,370 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_27081ade-fda8-4859-87bf-d8a70d6afefc/sv-benchmarks/c/weaver/unroll-3.wvr.c[2526,2539] [2023-11-24 21:39:09,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:39:09,406 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:39:09,407 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09 WrapperNode [2023-11-24 21:39:09,407 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:39:09,409 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:39:09,409 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:39:09,409 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:39:09,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,462 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 149 [2023-11-24 21:39:09,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:39:09,463 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:39:09,464 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:39:09,464 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:39:09,476 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,479 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,496 INFO L175 MemorySlicer]: Split 11 memory accesses to 4 slices as follows [2, 2, 2, 5]. 45 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]. [2023-11-24 21:39:09,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,521 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,526 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,528 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,531 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:39:09,532 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:39:09,532 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:39:09,533 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:39:09,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (1/1) ... [2023-11-24 21:39:09,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:39:09,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:39:09,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:39:09,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:39:09,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:39:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-24 21:39:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-24 21:39:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-24 21:39:09,649 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-24 21:39:09,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:39:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:39:09,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:39:09,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-24 21:39:09,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:39:09,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:39:09,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:39:09,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:39:09,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-24 21:39:09,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:39:09,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:39:09,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:39:09,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:39:09,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:39:09,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:39:09,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-24 21:39:09,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:39:09,659 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-24 21:39:09,885 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:39:09,887 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:39:10,286 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:39:10,615 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:39:10,615 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:39:10,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:39:10 BoogieIcfgContainer [2023-11-24 21:39:10,617 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:39:10,622 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:39:10,622 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:39:10,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:39:10,626 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:39:08" (1/3) ... [2023-11-24 21:39:10,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e47419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:39:10, skipping insertion in model container [2023-11-24 21:39:10,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:39:09" (2/3) ... [2023-11-24 21:39:10,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9e47419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:39:10, skipping insertion in model container [2023-11-24 21:39:10,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:39:10" (3/3) ... [2023-11-24 21:39:10,630 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-11-24 21:39:10,645 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-24 21:39:10,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:39:10,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:39:10,658 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-24 21:39:10,706 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-24 21:39:10,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 21 transitions, 56 flow [2023-11-24 21:39:10,770 INFO L124 PetriNetUnfolderBase]: 3/19 cut-off events. [2023-11-24 21:39:10,770 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:39:10,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 3/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 10 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-24 21:39:10,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 21 transitions, 56 flow [2023-11-24 21:39:10,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 18 transitions, 48 flow [2023-11-24 21:39:10,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:39:10,796 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;@6f1441af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:39:10,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-24 21:39:10,806 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-24 21:39:10,807 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2023-11-24 21:39:10,807 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-24 21:39:10,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:10,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:10,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:10,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1764738099, now seen corresponding path program 1 times [2023-11-24 21:39:10,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:10,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662903504] [2023-11-24 21:39:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:10,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:11,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:11,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662903504] [2023-11-24 21:39:11,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662903504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:11,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:11,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:39:11,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412637713] [2023-11-24 21:39:11,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:11,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:11,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:11,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:11,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:11,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:11,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-24 21:39:11,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:11,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:11,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:11,420 INFO L124 PetriNetUnfolderBase]: 75/137 cut-off events. [2023-11-24 21:39:11,420 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-24 21:39:11,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 137 events. 75/137 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 352 event pairs, 24 based on Foata normal form. 1/105 useless extension candidates. Maximal degree in co-relation 220. Up to 79 conditions per place. [2023-11-24 21:39:11,425 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 25 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2023-11-24 21:39:11,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 30 transitions, 139 flow [2023-11-24 21:39:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2023-11-24 21:39:11,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2023-11-24 21:39:11,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2023-11-24 21:39:11,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2023-11-24 21:39:11,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:11,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2023-11-24 21:39:11,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2023-11-24 21:39:11,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:11,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:11,453 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 48 flow. Second operand 3 states and 39 transitions. [2023-11-24 21:39:11,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 30 transitions, 139 flow [2023-11-24 21:39:11,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 30 transitions, 125 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-24 21:39:11,459 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2023-11-24 21:39:11,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2023-11-24 21:39:11,466 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-11-24 21:39:11,466 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2023-11-24 21:39:11,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2023-11-24 21:39:11,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:11,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:11,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:39:11,467 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:11,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:11,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1495654762, now seen corresponding path program 1 times [2023-11-24 21:39:11,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:11,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34180755] [2023-11-24 21:39:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:11,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:11,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:11,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34180755] [2023-11-24 21:39:11,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34180755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:11,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:11,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:39:11,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814538642] [2023-11-24 21:39:11,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:11,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:39:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:11,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:39:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:39:11,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:11,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-11-24 21:39:11,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:11,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:11,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:11,784 INFO L124 PetriNetUnfolderBase]: 75/138 cut-off events. [2023-11-24 21:39:11,784 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-24 21:39:11,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 138 events. 75/138 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 338 event pairs, 48 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 120. Up to 137 conditions per place. [2023-11-24 21:39:11,787 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 18 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-24 21:39:11,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 101 flow [2023-11-24 21:39:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:39:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-24 21:39:11,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 28 transitions. [2023-11-24 21:39:11,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-11-24 21:39:11,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 28 transitions. [2023-11-24 21:39:11,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 28 transitions. [2023-11-24 21:39:11,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:11,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 28 transitions. [2023-11-24 21:39:11,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2023-11-24 21:39:11,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:11,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:39:11,792 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 3 states and 28 transitions. [2023-11-24 21:39:11,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 101 flow [2023-11-24 21:39:11,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:11,794 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 68 flow [2023-11-24 21:39:11,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-11-24 21:39:11,795 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-11-24 21:39:11,795 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 68 flow [2023-11-24 21:39:11,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-11-24 21:39:11,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:11,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:11,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:39:11,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:11,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash 689632753, now seen corresponding path program 1 times [2023-11-24 21:39:11,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:11,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022158347] [2023-11-24 21:39:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:11,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:12,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:12,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022158347] [2023-11-24 21:39:12,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022158347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:39:12,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981188909] [2023-11-24 21:39:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:12,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:39:12,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:39:12,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:39:12,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:39:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:12,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:39:12,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:12,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:39:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:12,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981188909] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-24 21:39:12,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:39:12,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-11-24 21:39:12,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105054982] [2023-11-24 21:39:12,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:12,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:12,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:39:12,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:12,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2023-11-24 21:39:12,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:12,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:12,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:12,521 INFO L124 PetriNetUnfolderBase]: 83/152 cut-off events. [2023-11-24 21:39:12,521 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-24 21:39:12,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 152 events. 83/152 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 415 event pairs, 24 based on Foata normal form. 6/157 useless extension candidates. Maximal degree in co-relation 348. Up to 78 conditions per place. [2023-11-24 21:39:12,527 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 31 selfloop transitions, 4 changer transitions 1/37 dead transitions. [2023-11-24 21:39:12,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 180 flow [2023-11-24 21:39:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:39:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:39:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 48 transitions. [2023-11-24 21:39:12,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-24 21:39:12,532 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 48 transitions. [2023-11-24 21:39:12,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 48 transitions. [2023-11-24 21:39:12,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:12,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 48 transitions. [2023-11-24 21:39:12,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2023-11-24 21:39:12,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2023-11-24 21:39:12,534 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2023-11-24 21:39:12,535 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 68 flow. Second operand 4 states and 48 transitions. [2023-11-24 21:39:12,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 180 flow [2023-11-24 21:39:12,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 37 transitions, 176 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:12,540 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 90 flow [2023-11-24 21:39:12,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-11-24 21:39:12,541 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-11-24 21:39:12,542 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 90 flow [2023-11-24 21:39:12,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2023-11-24 21:39:12,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:12,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:12,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:12,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:39:12,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:12,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash -888707086, now seen corresponding path program 1 times [2023-11-24 21:39:12,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:12,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052607279] [2023-11-24 21:39:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:12,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:12,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:12,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052607279] [2023-11-24 21:39:12,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052607279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:12,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:12,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:39:12,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715951260] [2023-11-24 21:39:12,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:12,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:39:12,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:39:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:39:12,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:12,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-24 21:39:12,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:12,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:12,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:13,100 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2023-11-24 21:39:13,100 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2023-11-24 21:39:13,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 186 events. 93/186 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 632 event pairs, 26 based on Foata normal form. 12/197 useless extension candidates. Maximal degree in co-relation 492. Up to 101 conditions per place. [2023-11-24 21:39:13,103 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 33 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-11-24 21:39:13,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 46 transitions, 255 flow [2023-11-24 21:39:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:39:13,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:39:13,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2023-11-24 21:39:13,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2023-11-24 21:39:13,106 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 56 transitions. [2023-11-24 21:39:13,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 56 transitions. [2023-11-24 21:39:13,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:13,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 56 transitions. [2023-11-24 21:39:13,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 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) [2023-11-24 21:39:13,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2023-11-24 21:39:13,119 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2023-11-24 21:39:13,119 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 90 flow. Second operand 5 states and 56 transitions. [2023-11-24 21:39:13,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 46 transitions, 255 flow [2023-11-24 21:39:13,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 46 transitions, 250 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:13,124 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 117 flow [2023-11-24 21:39:13,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-24 21:39:13,126 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 11 predicate places. [2023-11-24 21:39:13,127 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 117 flow [2023-11-24 21:39:13,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-24 21:39:13,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:13,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:13,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:39:13,131 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:13,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:13,133 INFO L85 PathProgramCache]: Analyzing trace with hash 936842816, now seen corresponding path program 2 times [2023-11-24 21:39:13,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:13,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635728605] [2023-11-24 21:39:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:13,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:13,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:13,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:13,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635728605] [2023-11-24 21:39:13,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635728605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:13,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:13,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:39:13,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9064016] [2023-11-24 21:39:13,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:13,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:13,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:13,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:13,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:13,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:13,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2023-11-24 21:39:13,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:13,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:13,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:13,435 INFO L124 PetriNetUnfolderBase]: 93/181 cut-off events. [2023-11-24 21:39:13,435 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2023-11-24 21:39:13,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 181 events. 93/181 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 552 event pairs, 28 based on Foata normal form. 4/184 useless extension candidates. Maximal degree in co-relation 590. Up to 114 conditions per place. [2023-11-24 21:39:13,438 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 29 selfloop transitions, 4 changer transitions 4/38 dead transitions. [2023-11-24 21:39:13,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 38 transitions, 242 flow [2023-11-24 21:39:13,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:39:13,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:39:13,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-24 21:39:13,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-24 21:39:13,440 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-24 21:39:13,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-24 21:39:13,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:13,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-24 21:39:13,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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) [2023-11-24 21:39:13,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2023-11-24 21:39:13,443 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2023-11-24 21:39:13,443 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 117 flow. Second operand 4 states and 46 transitions. [2023-11-24 21:39:13,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 38 transitions, 242 flow [2023-11-24 21:39:13,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 38 transitions, 229 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-24 21:39:13,447 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 136 flow [2023-11-24 21:39:13,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-11-24 21:39:13,448 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-11-24 21:39:13,448 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 136 flow [2023-11-24 21:39:13,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2023-11-24 21:39:13,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:13,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:13,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:39:13,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:13,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:13,450 INFO L85 PathProgramCache]: Analyzing trace with hash 278282927, now seen corresponding path program 2 times [2023-11-24 21:39:13,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:13,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684619153] [2023-11-24 21:39:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:13,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:13,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:13,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684619153] [2023-11-24 21:39:13,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684619153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:13,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:13,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:39:13,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467255750] [2023-11-24 21:39:13,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:13,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:39:13,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:39:13,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:39:13,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:13,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-24 21:39:13,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:13,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:13,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:13,778 INFO L124 PetriNetUnfolderBase]: 103/204 cut-off events. [2023-11-24 21:39:13,778 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2023-11-24 21:39:13,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 204 events. 103/204 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 693 event pairs, 26 based on Foata normal form. 2/205 useless extension candidates. Maximal degree in co-relation 684. Up to 107 conditions per place. [2023-11-24 21:39:13,782 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 33 selfloop transitions, 9 changer transitions 10/53 dead transitions. [2023-11-24 21:39:13,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 355 flow [2023-11-24 21:39:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:39:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-24 21:39:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 63 transitions. [2023-11-24 21:39:13,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-24 21:39:13,787 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 63 transitions. [2023-11-24 21:39:13,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 63 transitions. [2023-11-24 21:39:13,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:13,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 63 transitions. [2023-11-24 21:39:13,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 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) [2023-11-24 21:39:13,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 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) [2023-11-24 21:39:13,792 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 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) [2023-11-24 21:39:13,792 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 136 flow. Second operand 6 states and 63 transitions. [2023-11-24 21:39:13,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 355 flow [2023-11-24 21:39:13,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 53 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:13,799 INFO L231 Difference]: Finished difference. Result has 41 places, 30 transitions, 193 flow [2023-11-24 21:39:13,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=41, PETRI_TRANSITIONS=30} [2023-11-24 21:39:13,802 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 19 predicate places. [2023-11-24 21:39:13,802 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 30 transitions, 193 flow [2023-11-24 21:39:13,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-24 21:39:13,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:13,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:13,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:39:13,809 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:13,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1401451265, now seen corresponding path program 3 times [2023-11-24 21:39:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:13,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266437944] [2023-11-24 21:39:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:13,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:13,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266437944] [2023-11-24 21:39:13,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266437944] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:39:13,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395001778] [2023-11-24 21:39:13,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:39:13,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:39:13,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:39:13,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:39:14,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:39:14,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-24 21:39:14,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:39:14,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:39:14,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:14,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:39:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:14,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395001778] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:39:14,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:39:14,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-24 21:39:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455745751] [2023-11-24 21:39:14,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:39:14,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:39:14,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:14,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:39:14,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:39:14,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:14,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 193 flow. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 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) [2023-11-24 21:39:14,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:14,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:14,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:14,447 INFO L124 PetriNetUnfolderBase]: 114/225 cut-off events. [2023-11-24 21:39:14,447 INFO L125 PetriNetUnfolderBase]: For 467/467 co-relation queries the response was YES. [2023-11-24 21:39:14,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 225 events. 114/225 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 745 event pairs, 38 based on Foata normal form. 6/230 useless extension candidates. Maximal degree in co-relation 866. Up to 145 conditions per place. [2023-11-24 21:39:14,451 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 36 selfloop transitions, 13 changer transitions 4/54 dead transitions. [2023-11-24 21:39:14,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 419 flow [2023-11-24 21:39:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:39:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:39:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 57 transitions. [2023-11-24 21:39:14,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-24 21:39:14,452 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 57 transitions. [2023-11-24 21:39:14,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 57 transitions. [2023-11-24 21:39:14,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:14,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 57 transitions. [2023-11-24 21:39:14,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2023-11-24 21:39:14,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2023-11-24 21:39:14,456 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2023-11-24 21:39:14,456 INFO L175 Difference]: Start difference. First operand has 41 places, 30 transitions, 193 flow. Second operand 5 states and 57 transitions. [2023-11-24 21:39:14,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 419 flow [2023-11-24 21:39:14,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 397 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-24 21:39:14,462 INFO L231 Difference]: Finished difference. Result has 45 places, 36 transitions, 277 flow [2023-11-24 21:39:14,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2023-11-24 21:39:14,463 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-11-24 21:39:14,463 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 277 flow [2023-11-24 21:39:14,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 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) [2023-11-24 21:39:14,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:14,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:14,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:39:14,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:39:14,670 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:14,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:14,671 INFO L85 PathProgramCache]: Analyzing trace with hash -491136274, now seen corresponding path program 3 times [2023-11-24 21:39:14,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:14,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592207424] [2023-11-24 21:39:14,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:14,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:14,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:14,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592207424] [2023-11-24 21:39:14,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592207424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:14,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:14,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:39:14,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300942574] [2023-11-24 21:39:14,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:14,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:39:14,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:14,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:39:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:39:14,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:14,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 36 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2023-11-24 21:39:14,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:14,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:14,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:14,896 INFO L124 PetriNetUnfolderBase]: 114/218 cut-off events. [2023-11-24 21:39:14,896 INFO L125 PetriNetUnfolderBase]: For 652/652 co-relation queries the response was YES. [2023-11-24 21:39:14,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984 conditions, 218 events. 114/218 cut-off events. For 652/652 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 704 event pairs, 34 based on Foata normal form. 4/221 useless extension candidates. Maximal degree in co-relation 956. Up to 149 conditions per place. [2023-11-24 21:39:14,899 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 31 selfloop transitions, 12 changer transitions 4/48 dead transitions. [2023-11-24 21:39:14,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 48 transitions, 433 flow [2023-11-24 21:39:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:39:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-24 21:39:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2023-11-24 21:39:14,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2023-11-24 21:39:14,901 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2023-11-24 21:39:14,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2023-11-24 21:39:14,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:14,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2023-11-24 21:39:14,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2023-11-24 21:39:14,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2023-11-24 21:39:14,903 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 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) [2023-11-24 21:39:14,903 INFO L175 Difference]: Start difference. First operand has 45 places, 36 transitions, 277 flow. Second operand 4 states and 45 transitions. [2023-11-24 21:39:14,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 48 transitions, 433 flow [2023-11-24 21:39:14,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 48 transitions, 414 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-11-24 21:39:14,909 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 305 flow [2023-11-24 21:39:14,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-11-24 21:39:14,911 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 26 predicate places. [2023-11-24 21:39:14,911 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 305 flow [2023-11-24 21:39:14,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2023-11-24 21:39:14,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:14,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:14,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:39:14,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:14,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:14,913 INFO L85 PathProgramCache]: Analyzing trace with hash -107225049, now seen corresponding path program 4 times [2023-11-24 21:39:14,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:14,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603860677] [2023-11-24 21:39:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:14,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:15,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:15,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603860677] [2023-11-24 21:39:15,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603860677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:39:15,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:39:15,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:39:15,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058260976] [2023-11-24 21:39:15,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:39:15,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:39:15,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:15,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:39:15,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:39:15,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:15,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-24 21:39:15,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:15,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:15,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:15,174 INFO L124 PetriNetUnfolderBase]: 100/182 cut-off events. [2023-11-24 21:39:15,174 INFO L125 PetriNetUnfolderBase]: For 703/703 co-relation queries the response was YES. [2023-11-24 21:39:15,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 862 conditions, 182 events. 100/182 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 518 event pairs, 31 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 833. Up to 130 conditions per place. [2023-11-24 21:39:15,177 INFO L140 encePairwiseOnDemand]: 16/21 looper letters, 32 selfloop transitions, 9 changer transitions 4/46 dead transitions. [2023-11-24 21:39:15,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 440 flow [2023-11-24 21:39:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:39:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-24 21:39:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2023-11-24 21:39:15,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-11-24 21:39:15,180 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 45 transitions. [2023-11-24 21:39:15,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 45 transitions. [2023-11-24 21:39:15,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:15,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 45 transitions. [2023-11-24 21:39:15,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2023-11-24 21:39:15,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2023-11-24 21:39:15,182 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2023-11-24 21:39:15,182 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 305 flow. Second operand 5 states and 45 transitions. [2023-11-24 21:39:15,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 440 flow [2023-11-24 21:39:15,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 46 transitions, 420 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-24 21:39:15,189 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 321 flow [2023-11-24 21:39:15,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=321, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-11-24 21:39:15,190 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2023-11-24 21:39:15,190 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 321 flow [2023-11-24 21:39:15,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 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) [2023-11-24 21:39:15,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:15,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:15,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:39:15,193 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:15,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:15,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1474385269, now seen corresponding path program 1 times [2023-11-24 21:39:15,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:15,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001325790] [2023-11-24 21:39:15,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:15,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:39:15,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:15,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001325790] [2023-11-24 21:39:15,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001325790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:39:15,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148887344] [2023-11-24 21:39:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:15,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:39:15,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:39:15,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:39:15,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:39:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:15,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 21:39:15,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:16,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2023-11-24 21:39:16,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:39:16,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 41 [2023-11-24 21:39:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:16,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:39:16,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 116 [2023-11-24 21:39:16,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:39:16,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 765 treesize of output 645 [2023-11-24 21:39:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:43,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148887344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:39:43,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:39:43,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-11-24 21:39:43,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928173661] [2023-11-24 21:39:43,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:39:43,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:39:43,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:39:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:39:43,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:39:43,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2023-11-24 21:39:43,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 321 flow. Second operand has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 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) [2023-11-24 21:39:43,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-24 21:39:43,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2023-11-24 21:39:43,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-24 21:39:47,906 INFO L124 PetriNetUnfolderBase]: 309/558 cut-off events. [2023-11-24 21:39:47,906 INFO L125 PetriNetUnfolderBase]: For 1883/1883 co-relation queries the response was YES. [2023-11-24 21:39:47,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 558 events. 309/558 cut-off events. For 1883/1883 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2363 event pairs, 14 based on Foata normal form. 10/566 useless extension candidates. Maximal degree in co-relation 2582. Up to 237 conditions per place. [2023-11-24 21:39:47,913 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 58 selfloop transitions, 27 changer transitions 93/179 dead transitions. [2023-11-24 21:39:47,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 179 transitions, 1541 flow [2023-11-24 21:39:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-24 21:39:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-24 21:39:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 245 transitions. [2023-11-24 21:39:47,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40229885057471265 [2023-11-24 21:39:47,917 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 245 transitions. [2023-11-24 21:39:47,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 245 transitions. [2023-11-24 21:39:47,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-24 21:39:47,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 245 transitions. [2023-11-24 21:39:47,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 8.448275862068966) internal successors, (245), 29 states have internal predecessors, (245), 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) [2023-11-24 21:39:47,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 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) [2023-11-24 21:39:47,921 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 21.0) internal successors, (630), 30 states have internal predecessors, (630), 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) [2023-11-24 21:39:47,922 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 321 flow. Second operand 29 states and 245 transitions. [2023-11-24 21:39:47,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 179 transitions, 1541 flow [2023-11-24 21:39:47,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 179 transitions, 1433 flow, removed 20 selfloop flow, removed 4 redundant places. [2023-11-24 21:39:47,938 INFO L231 Difference]: Finished difference. Result has 87 places, 49 transitions, 509 flow [2023-11-24 21:39:47,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=509, PETRI_PLACES=87, PETRI_TRANSITIONS=49} [2023-11-24 21:39:47,939 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 65 predicate places. [2023-11-24 21:39:47,939 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 49 transitions, 509 flow [2023-11-24 21:39:47,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.705882352941177) internal successors, (97), 17 states have internal predecessors, (97), 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) [2023-11-24 21:39:47,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-24 21:39:47,940 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:39:47,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-24 21:39:48,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:39:48,146 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-24 21:39:48,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:39:48,147 INFO L85 PathProgramCache]: Analyzing trace with hash -839814674, now seen corresponding path program 2 times [2023-11-24 21:39:48,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:39:48,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002460739] [2023-11-24 21:39:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:39:48,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:39:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:39:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:39:49,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:39:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002460739] [2023-11-24 21:39:49,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002460739] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:39:49,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498979771] [2023-11-24 21:39:49,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:39:49,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:39:49,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:39:49,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:39:49,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27081ade-fda8-4859-87bf-d8a70d6afefc/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:39:49,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:39:49,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:39:49,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-24 21:39:49,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:39:49,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2023-11-24 21:39:49,486 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-24 21:39:49,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2023-11-24 21:39:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:39:49,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:39:50,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 150 [2023-11-24 21:39:50,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:39:50,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 572 treesize of output 488