./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:49:59,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:49:59,572 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 11:49:59,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:49:59,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:49:59,626 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:49:59,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:49:59,628 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:49:59,629 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:49:59,634 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:49:59,635 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:49:59,636 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:49:59,637 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:49:59,639 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:49:59,639 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:49:59,640 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:49:59,640 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 11:49:59,641 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:49:59,641 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:49:59,642 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:49:59,643 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:49:59,644 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 11:49:59,645 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:49:59,645 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 11:49:59,646 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:49:59,646 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 11:49:59,647 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:49:59,648 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:49:59,648 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:49:59,649 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:49:59,650 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:49:59,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:49:59,651 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:49:59,651 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:49:59,651 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 11:49:59,651 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:49:59,652 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:49:59,652 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:49:59,652 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:49:59,653 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 11:49:59,653 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:49:59,653 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:49:59,654 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_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2023-11-26 11:49:59,929 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:49:59,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:49:59,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:49:59,967 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:49:59,968 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:49:59,969 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-26 11:50:03,074 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:50:03,298 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:50:03,299 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/sv-benchmarks/c/weaver/test-context1.wvr.c [2023-11-26 11:50:03,309 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/data/7c976e64e/a2e1c2203e7348538ffec128e128c52b/FLAGba0a8fd57 [2023-11-26 11:50:03,326 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/data/7c976e64e/a2e1c2203e7348538ffec128e128c52b [2023-11-26 11:50:03,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:50:03,331 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:50:03,333 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:03,333 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:50:03,339 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:50:03,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9f867e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03, skipping insertion in model container [2023-11-26 11:50:03,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,369 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:50:03,600 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_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-26 11:50:03,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:03,624 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:50:03,648 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_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/sv-benchmarks/c/weaver/test-context1.wvr.c[2459,2472] [2023-11-26 11:50:03,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:50:03,664 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:50:03,664 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 11:50:03,673 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:50:03,674 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03 WrapperNode [2023-11-26 11:50:03,674 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:50:03,676 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:03,676 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:50:03,676 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:50:03,685 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,697 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,732 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 137 [2023-11-26 11:50:03,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:50:03,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:50:03,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:50:03,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:50:03,745 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,748 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,766 INFO L175 MemorySlicer]: Split 9 memory accesses to 4 slices as follows [2, 2, 2, 3]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 11:50:03,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,767 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,780 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,782 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,784 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,788 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:50:03,789 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:50:03,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:50:03,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:50:03,791 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (1/1) ... [2023-11-26 11:50:03,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:50:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:03,858 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:50:03,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:50:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:50:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 11:50:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 11:50:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 11:50:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 11:50:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:50:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:50:03,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:50:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 11:50:03,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:50:03,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:50:03,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:50:03,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:50:03,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 11:50:03,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 11:50:03,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 11:50:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:50:03,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:50:03,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:50:03,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:50:03,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:50:03,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:50:03,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 11:50:03,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:50:03,925 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 11:50:04,091 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:50:04,094 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:50:04,440 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:50:04,784 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:50:04,785 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 11:50:04,785 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:04 BoogieIcfgContainer [2023-11-26 11:50:04,786 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:50:04,788 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:50:04,788 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:50:04,792 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:50:04,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:50:03" (1/3) ... [2023-11-26 11:50:04,793 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d074d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:04, skipping insertion in model container [2023-11-26 11:50:04,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:50:03" (2/3) ... [2023-11-26 11:50:04,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d074d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:50:04, skipping insertion in model container [2023-11-26 11:50:04,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:50:04" (3/3) ... [2023-11-26 11:50:04,796 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-11-26 11:50:04,805 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 11:50:04,816 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:50:04,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 11:50:04,816 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 11:50:04,862 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-26 11:50:04,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 29 transitions, 72 flow [2023-11-26 11:50:04,934 INFO L124 PetriNetUnfolderBase]: 5/27 cut-off events. [2023-11-26 11:50:04,935 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:50:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 27 events. 5/27 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2023-11-26 11:50:04,938 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 29 transitions, 72 flow [2023-11-26 11:50:04,942 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 26 transitions, 64 flow [2023-11-26 11:50:04,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:50:04,974 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;@6d2d134c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:50:04,975 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-26 11:50:05,011 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 11:50:05,012 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-11-26 11:50:05,012 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-26 11:50:05,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:05,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:05,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:05,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1474316529, now seen corresponding path program 1 times [2023-11-26 11:50:05,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:05,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917417273] [2023-11-26 11:50:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:05,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:05,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917417273] [2023-11-26 11:50:05,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917417273] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:05,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:05,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:05,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191915768] [2023-11-26 11:50:05,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:05,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 11:50:05,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:05,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 11:50:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 11:50:05,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:05,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 64 flow. Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 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) [2023-11-26 11:50:05,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:05,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:05,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:05,493 INFO L124 PetriNetUnfolderBase]: 109/202 cut-off events. [2023-11-26 11:50:05,494 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-11-26 11:50:05,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 202 events. 109/202 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 776 event pairs, 64 based on Foata normal form. 40/190 useless extension candidates. Maximal degree in co-relation 334. Up to 180 conditions per place. [2023-11-26 11:50:05,501 INFO L140 encePairwiseOnDemand]: 27/29 looper letters, 19 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2023-11-26 11:50:05,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 98 flow [2023-11-26 11:50:05,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 11:50:05,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-26 11:50:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 35 transitions. [2023-11-26 11:50:05,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603448275862069 [2023-11-26 11:50:05,517 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 35 transitions. [2023-11-26 11:50:05,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 35 transitions. [2023-11-26 11:50:05,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:05,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 35 transitions. [2023-11-26 11:50:05,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 17.5) internal successors, (35), 2 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:05,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:05,529 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:05,531 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 64 flow. Second operand 2 states and 35 transitions. [2023-11-26 11:50:05,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 98 flow [2023-11-26 11:50:05,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-26 11:50:05,539 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 52 flow [2023-11-26 11:50:05,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-11-26 11:50:05,547 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -3 predicate places. [2023-11-26 11:50:05,547 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 52 flow [2023-11-26 11:50:05,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 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) [2023-11-26 11:50:05,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:05,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:05,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:50:05,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:05,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1351442730, now seen corresponding path program 1 times [2023-11-26 11:50:05,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:05,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046260161] [2023-11-26 11:50:05,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:05,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:05,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:05,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046260161] [2023-11-26 11:50:05,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046260161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:05,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:05,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:05,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926801463] [2023-11-26 11:50:05,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:05,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:05,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:05,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:05,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:05,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:05,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:05,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:05,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:05,863 INFO L124 PetriNetUnfolderBase]: 164/302 cut-off events. [2023-11-26 11:50:05,863 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-26 11:50:05,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 302 events. 164/302 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1240 event pairs, 56 based on Foata normal form. 1/235 useless extension candidates. Maximal degree in co-relation 582. Up to 139 conditions per place. [2023-11-26 11:50:05,867 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 26 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2023-11-26 11:50:05,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 36 transitions, 140 flow [2023-11-26 11:50:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:05,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2023-11-26 11:50:05,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2023-11-26 11:50:05,870 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 53 transitions. [2023-11-26 11:50:05,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 53 transitions. [2023-11-26 11:50:05,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:05,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 53 transitions. [2023-11-26 11:50:05,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:05,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:05,873 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:05,873 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 52 flow. Second operand 3 states and 53 transitions. [2023-11-26 11:50:05,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 36 transitions, 140 flow [2023-11-26 11:50:05,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 36 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 11:50:05,876 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 64 flow [2023-11-26 11:50:05,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2023-11-26 11:50:05,877 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-11-26 11:50:05,878 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 64 flow [2023-11-26 11:50:05,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:05,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:05,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:05,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:50:05,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:05,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:05,880 INFO L85 PathProgramCache]: Analyzing trace with hash -959153222, now seen corresponding path program 1 times [2023-11-26 11:50:05,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:05,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764722472] [2023-11-26 11:50:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:05,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:06,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:06,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764722472] [2023-11-26 11:50:06,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764722472] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:06,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:06,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:50:06,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577610685] [2023-11-26 11:50:06,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:06,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:50:06,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:06,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:50:06,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:50:06,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:06,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:06,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:06,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:06,261 INFO L124 PetriNetUnfolderBase]: 176/345 cut-off events. [2023-11-26 11:50:06,262 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-26 11:50:06,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 345 events. 176/345 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1567 event pairs, 77 based on Foata normal form. 10/289 useless extension candidates. Maximal degree in co-relation 704. Up to 222 conditions per place. [2023-11-26 11:50:06,266 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 24 selfloop transitions, 2 changer transitions 7/38 dead transitions. [2023-11-26 11:50:06,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 38 transitions, 159 flow [2023-11-26 11:50:06,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:50:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 11:50:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2023-11-26 11:50:06,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2023-11-26 11:50:06,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 54 transitions. [2023-11-26 11:50:06,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 54 transitions. [2023-11-26 11:50:06,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:06,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 54 transitions. [2023-11-26 11:50:06,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,273 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,279 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 64 flow. Second operand 3 states and 54 transitions. [2023-11-26 11:50:06,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 38 transitions, 159 flow [2023-11-26 11:50:06,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 38 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:50:06,282 INFO L231 Difference]: Finished difference. Result has 30 places, 26 transitions, 74 flow [2023-11-26 11:50:06,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2023-11-26 11:50:06,283 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-11-26 11:50:06,284 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 74 flow [2023-11-26 11:50:06,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:06,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:06,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:50:06,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:06,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:06,288 INFO L85 PathProgramCache]: Analyzing trace with hash 171303639, now seen corresponding path program 1 times [2023-11-26 11:50:06,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:06,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265625173] [2023-11-26 11:50:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:06,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:06,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:06,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265625173] [2023-11-26 11:50:06,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265625173] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:50:06,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:50:06,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 11:50:06,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703291307] [2023-11-26 11:50:06,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:50:06,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:50:06,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:06,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:50:06,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:50:06,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:06,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 74 flow. Second operand has 4 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) [2023-11-26 11:50:06,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:06,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:06,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:06,837 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2023-11-26 11:50:06,837 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-11-26 11:50:06,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 449 events. 221/449 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2284 event pairs, 192 based on Foata normal form. 10/367 useless extension candidates. Maximal degree in co-relation 948. Up to 319 conditions per place. [2023-11-26 11:50:06,845 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 14/41 dead transitions. [2023-11-26 11:50:06,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 41 transitions, 180 flow [2023-11-26 11:50:06,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:50:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-26 11:50:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 63 transitions. [2023-11-26 11:50:06,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431034482758621 [2023-11-26 11:50:06,850 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 63 transitions. [2023-11-26 11:50:06,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 63 transitions. [2023-11-26 11:50:06,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:06,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 63 transitions. [2023-11-26 11:50:06,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.75) internal successors, (63), 4 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) [2023-11-26 11:50:06,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,856 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:06,856 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 74 flow. Second operand 4 states and 63 transitions. [2023-11-26 11:50:06,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 41 transitions, 180 flow [2023-11-26 11:50:06,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 11:50:06,862 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2023-11-26 11:50:06,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2023-11-26 11:50:06,864 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-11-26 11:50:06,865 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2023-11-26 11:50:06,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2023-11-26 11:50:06,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:06,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:06,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:50:06,867 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:06,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:06,867 INFO L85 PathProgramCache]: Analyzing trace with hash -832023193, now seen corresponding path program 1 times [2023-11-26 11:50:06,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:06,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556089024] [2023-11-26 11:50:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:06,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:50:07,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:07,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556089024] [2023-11-26 11:50:07,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556089024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:07,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519320458] [2023-11-26 11:50:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:07,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:07,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:07,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:07,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:50:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:07,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:50:07,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:07,628 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 [2023-11-26 11:50:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:07,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:08,008 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 41 treesize of output 37 [2023-11-26 11:50:08,027 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:50:08,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 41 [2023-11-26 11:50:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:08,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519320458] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:08,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:08,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2023-11-26 11:50:08,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379599112] [2023-11-26 11:50:08,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:08,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:50:08,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:08,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:50:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-26 11:50:08,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:08,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:08,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:08,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:08,403 INFO L124 PetriNetUnfolderBase]: 232/455 cut-off events. [2023-11-26 11:50:08,403 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-11-26 11:50:08,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 982 conditions, 455 events. 232/455 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2049 event pairs, 45 based on Foata normal form. 1/372 useless extension candidates. Maximal degree in co-relation 974. Up to 113 conditions per place. [2023-11-26 11:50:08,408 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 38 selfloop transitions, 6 changer transitions 13/62 dead transitions. [2023-11-26 11:50:08,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 62 transitions, 283 flow [2023-11-26 11:50:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:50:08,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 11:50:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2023-11-26 11:50:08,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270935960591133 [2023-11-26 11:50:08,414 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 107 transitions. [2023-11-26 11:50:08,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 107 transitions. [2023-11-26 11:50:08,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:08,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 107 transitions. [2023-11-26 11:50:08,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,422 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,422 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 7 states and 107 transitions. [2023-11-26 11:50:08,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 62 transitions, 283 flow [2023-11-26 11:50:08,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 62 transitions, 277 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:08,428 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 102 flow [2023-11-26 11:50:08,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=102, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-11-26 11:50:08,431 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 10 predicate places. [2023-11-26 11:50:08,432 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 102 flow [2023-11-26 11:50:08,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:08,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:08,433 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:08,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 11:50:08,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:08,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:08,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:08,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1783023759, now seen corresponding path program 2 times [2023-11-26 11:50:08,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:08,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15408955] [2023-11-26 11:50:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:08,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:50:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15408955] [2023-11-26 11:50:08,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15408955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:08,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192916080] [2023-11-26 11:50:08,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:50:08,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:08,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:08,778 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:08,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:50:08,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:50:08,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:08,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:50:08,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:50:09,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:50:09,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192916080] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:09,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:09,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-11-26 11:50:09,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836970746] [2023-11-26 11:50:09,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:09,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:50:09,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:09,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:50:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:50:09,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:09,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:09,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:09,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:09,757 INFO L124 PetriNetUnfolderBase]: 657/1294 cut-off events. [2023-11-26 11:50:09,757 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2023-11-26 11:50:09,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846 conditions, 1294 events. 657/1294 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7557 event pairs, 234 based on Foata normal form. 38/1094 useless extension candidates. Maximal degree in co-relation 2838. Up to 335 conditions per place. [2023-11-26 11:50:09,766 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 46 selfloop transitions, 9 changer transitions 39/99 dead transitions. [2023-11-26 11:50:09,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 99 transitions, 494 flow [2023-11-26 11:50:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-26 11:50:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-26 11:50:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2023-11-26 11:50:09,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938697318007663 [2023-11-26 11:50:09,769 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 155 transitions. [2023-11-26 11:50:09,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 155 transitions. [2023-11-26 11:50:09,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:09,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 155 transitions. [2023-11-26 11:50:09,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 17.22222222222222) internal successors, (155), 9 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,772 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 29.0) internal successors, (290), 10 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,772 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 102 flow. Second operand 9 states and 155 transitions. [2023-11-26 11:50:09,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 99 transitions, 494 flow [2023-11-26 11:50:09,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 99 transitions, 478 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-26 11:50:09,783 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 174 flow [2023-11-26 11:50:09,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-11-26 11:50:09,787 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 19 predicate places. [2023-11-26 11:50:09,788 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 174 flow [2023-11-26 11:50:09,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.23076923076923) internal successors, (146), 13 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:09,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:09,791 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:09,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-26 11:50:09,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:09,998 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:09,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash -23646222, now seen corresponding path program 3 times [2023-11-26 11:50:09,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:09,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995202454] [2023-11-26 11:50:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:09,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:10,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:10,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995202454] [2023-11-26 11:50:10,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995202454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:10,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796751974] [2023-11-26 11:50:10,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 11:50:10,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:10,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:10,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:10,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:50:10,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-26 11:50:10,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:10,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-26 11:50:10,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:10,983 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 [2023-11-26 11:50:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:11,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:12,194 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 43 treesize of output 39 [2023-11-26 11:50:12,211 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:50:12,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 47 [2023-11-26 11:50:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:12,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796751974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:12,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:12,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-11-26 11:50:12,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516468694] [2023-11-26 11:50:12,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:12,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-26 11:50:12,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:12,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-26 11:50:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-26 11:50:12,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:12,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 174 flow. Second operand has 19 states, 19 states have (on average 9.526315789473685) internal successors, (181), 19 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:12,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:12,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:12,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:14,577 INFO L124 PetriNetUnfolderBase]: 1865/3627 cut-off events. [2023-11-26 11:50:14,578 INFO L125 PetriNetUnfolderBase]: For 2880/2880 co-relation queries the response was YES. [2023-11-26 11:50:14,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8783 conditions, 3627 events. 1865/3627 cut-off events. For 2880/2880 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 23629 event pairs, 482 based on Foata normal form. 12/3001 useless extension candidates. Maximal degree in co-relation 8770. Up to 586 conditions per place. [2023-11-26 11:50:14,603 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 162 selfloop transitions, 32 changer transitions 30/229 dead transitions. [2023-11-26 11:50:14,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 229 transitions, 1350 flow [2023-11-26 11:50:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-26 11:50:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-26 11:50:14,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 337 transitions. [2023-11-26 11:50:14,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6116152450090744 [2023-11-26 11:50:14,606 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 337 transitions. [2023-11-26 11:50:14,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 337 transitions. [2023-11-26 11:50:14,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:14,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 337 transitions. [2023-11-26 11:50:14,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 17.736842105263158) internal successors, (337), 19 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:14,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:14,610 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 29.0) internal successors, (580), 20 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:14,611 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 174 flow. Second operand 19 states and 337 transitions. [2023-11-26 11:50:14,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 229 transitions, 1350 flow [2023-11-26 11:50:14,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 229 transitions, 1314 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-11-26 11:50:14,626 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 575 flow [2023-11-26 11:50:14,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=575, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2023-11-26 11:50:14,627 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 42 predicate places. [2023-11-26 11:50:14,627 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 575 flow [2023-11-26 11:50:14,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.526315789473685) internal successors, (181), 19 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:14,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:14,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:14,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-26 11:50:14,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:14,834 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:14,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1384883908, now seen corresponding path program 4 times [2023-11-26 11:50:14,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:14,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150472629] [2023-11-26 11:50:14,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:14,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:50:15,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:15,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150472629] [2023-11-26 11:50:15,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150472629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517673852] [2023-11-26 11:50:15,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 11:50:15,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:15,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:15,420 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:15,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:50:15,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 11:50:15,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:15,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 11:50:15,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:50:15,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:15,713 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:50:15,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-26 11:50:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:50:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517673852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:15,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:15,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2023-11-26 11:50:15,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795337900] [2023-11-26 11:50:15,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:15,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 11:50:15,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:15,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 11:50:15,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-26 11:50:15,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:15,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 575 flow. Second operand has 12 states, 12 states have (on average 10.5) internal successors, (126), 12 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) [2023-11-26 11:50:15,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:15,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:15,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:17,137 INFO L124 PetriNetUnfolderBase]: 3097/5885 cut-off events. [2023-11-26 11:50:17,138 INFO L125 PetriNetUnfolderBase]: For 15816/15816 co-relation queries the response was YES. [2023-11-26 11:50:17,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16678 conditions, 5885 events. 3097/5885 cut-off events. For 15816/15816 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 41260 event pairs, 608 based on Foata normal form. 12/4863 useless extension candidates. Maximal degree in co-relation 16655. Up to 978 conditions per place. [2023-11-26 11:50:17,185 INFO L140 encePairwiseOnDemand]: 24/29 looper letters, 94 selfloop transitions, 48 changer transitions 43/190 dead transitions. [2023-11-26 11:50:17,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 190 transitions, 1572 flow [2023-11-26 11:50:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:50:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-26 11:50:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 218 transitions. [2023-11-26 11:50:17,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6264367816091954 [2023-11-26 11:50:17,188 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 218 transitions. [2023-11-26 11:50:17,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 218 transitions. [2023-11-26 11:50:17,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:17,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 218 transitions. [2023-11-26 11:50:17,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 18.166666666666668) internal successors, (218), 12 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:17,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:17,191 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:17,191 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 575 flow. Second operand 12 states and 218 transitions. [2023-11-26 11:50:17,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 190 transitions, 1572 flow [2023-11-26 11:50:17,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 190 transitions, 1376 flow, removed 96 selfloop flow, removed 2 redundant places. [2023-11-26 11:50:17,287 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 867 flow [2023-11-26 11:50:17,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=867, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2023-11-26 11:50:17,288 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2023-11-26 11:50:17,289 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 867 flow [2023-11-26 11:50:17,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.5) internal successors, (126), 12 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) [2023-11-26 11:50:17,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:17,289 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:17,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:17,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:17,498 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:17,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:17,498 INFO L85 PathProgramCache]: Analyzing trace with hash 251954506, now seen corresponding path program 5 times [2023-11-26 11:50:17,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:17,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808955626] [2023-11-26 11:50:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:17,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-26 11:50:17,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:17,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808955626] [2023-11-26 11:50:17,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808955626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:17,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955411680] [2023-11-26 11:50:17,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 11:50:17,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:17,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:17,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:17,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:50:17,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-26 11:50:17,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:17,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 11:50:17,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 11:50:17,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 11:50:17,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955411680] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:17,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:17,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-11-26 11:50:17,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999015906] [2023-11-26 11:50:17,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:17,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:50:17,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:50:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-26 11:50:17,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:17,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 867 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:17,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:17,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:17,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:20,352 INFO L124 PetriNetUnfolderBase]: 6159/11623 cut-off events. [2023-11-26 11:50:20,353 INFO L125 PetriNetUnfolderBase]: For 36308/36308 co-relation queries the response was YES. [2023-11-26 11:50:20,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33884 conditions, 11623 events. 6159/11623 cut-off events. For 36308/36308 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 92689 event pairs, 1754 based on Foata normal form. 90/9667 useless extension candidates. Maximal degree in co-relation 33855. Up to 3943 conditions per place. [2023-11-26 11:50:20,458 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 104 selfloop transitions, 73 changer transitions 0/182 dead transitions. [2023-11-26 11:50:20,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 182 transitions, 2087 flow [2023-11-26 11:50:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 11:50:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 11:50:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2023-11-26 11:50:20,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6827586206896552 [2023-11-26 11:50:20,460 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 99 transitions. [2023-11-26 11:50:20,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 99 transitions. [2023-11-26 11:50:20,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:20,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 99 transitions. [2023-11-26 11:50:20,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:20,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:20,462 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 29.0) internal successors, (174), 6 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:20,463 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 867 flow. Second operand 5 states and 99 transitions. [2023-11-26 11:50:20,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 182 transitions, 2087 flow [2023-11-26 11:50:20,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 182 transitions, 1708 flow, removed 152 selfloop flow, removed 7 redundant places. [2023-11-26 11:50:20,548 INFO L231 Difference]: Finished difference. Result has 84 places, 143 transitions, 1565 flow [2023-11-26 11:50:20,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1565, PETRI_PLACES=84, PETRI_TRANSITIONS=143} [2023-11-26 11:50:20,550 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 56 predicate places. [2023-11-26 11:50:20,550 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 143 transitions, 1565 flow [2023-11-26 11:50:20,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:20,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:20,551 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:20,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-26 11:50:20,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:20,758 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:20,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash 240113327, now seen corresponding path program 6 times [2023-11-26 11:50:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:20,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130360790] [2023-11-26 11:50:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:20,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:50:21,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130360790] [2023-11-26 11:50:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130360790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142961179] [2023-11-26 11:50:21,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 11:50:21,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:21,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:21,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:21,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:50:22,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-26 11:50:22,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:22,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-26 11:50:22,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:22,638 INFO L349 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2023-11-26 11:50:22,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 16 [2023-11-26 11:50:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:50:22,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:23,215 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-11-26 11:50:23,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 30 [2023-11-26 11:50:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:50:23,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142961179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:23,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:23,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2023-11-26 11:50:23,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755453585] [2023-11-26 11:50:23,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:23,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 11:50:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 11:50:23,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2023-11-26 11:50:23,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:23,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 143 transitions, 1565 flow. Second operand has 29 states, 29 states have (on average 9.310344827586206) internal successors, (270), 29 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:23,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:23,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:23,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:31,299 INFO L124 PetriNetUnfolderBase]: 12452/23592 cut-off events. [2023-11-26 11:50:31,299 INFO L125 PetriNetUnfolderBase]: For 90634/90634 co-relation queries the response was YES. [2023-11-26 11:50:31,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71392 conditions, 23592 events. 12452/23592 cut-off events. For 90634/90634 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 209561 event pairs, 2231 based on Foata normal form. 37/19502 useless extension candidates. Maximal degree in co-relation 71361. Up to 3719 conditions per place. [2023-11-26 11:50:31,437 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 171 selfloop transitions, 158 changer transitions 261/595 dead transitions. [2023-11-26 11:50:31,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 595 transitions, 5537 flow [2023-11-26 11:50:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-26 11:50:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-26 11:50:31,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 630 transitions. [2023-11-26 11:50:31,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6206896551724138 [2023-11-26 11:50:31,443 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 630 transitions. [2023-11-26 11:50:31,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 630 transitions. [2023-11-26 11:50:31,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:31,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 630 transitions. [2023-11-26 11:50:31,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 18.0) internal successors, (630), 35 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) [2023-11-26 11:50:31,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 29.0) internal successors, (1044), 36 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:31,451 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 29.0) internal successors, (1044), 36 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:31,451 INFO L175 Difference]: Start difference. First operand has 84 places, 143 transitions, 1565 flow. Second operand 35 states and 630 transitions. [2023-11-26 11:50:31,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 595 transitions, 5537 flow [2023-11-26 11:50:31,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 595 transitions, 5347 flow, removed 95 selfloop flow, removed 0 redundant places. [2023-11-26 11:50:31,771 INFO L231 Difference]: Finished difference. Result has 134 places, 194 transitions, 2802 flow [2023-11-26 11:50:31,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2802, PETRI_PLACES=134, PETRI_TRANSITIONS=194} [2023-11-26 11:50:31,773 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 106 predicate places. [2023-11-26 11:50:31,773 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 194 transitions, 2802 flow [2023-11-26 11:50:31,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.310344827586206) internal successors, (270), 29 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:31,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:31,774 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:31,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:31,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 11:50:31,981 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:31,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:31,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1552474057, now seen corresponding path program 7 times [2023-11-26 11:50:31,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:31,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239256355] [2023-11-26 11:50:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:31,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:50:32,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:32,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239256355] [2023-11-26 11:50:32,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239256355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:32,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986030021] [2023-11-26 11:50:32,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 11:50:32,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:32,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:32,840 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:32,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:50:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:32,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-26 11:50:32,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:50:33,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:33,359 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-26 11:50:33,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2023-11-26 11:50:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:50:33,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986030021] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:33,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:33,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 24 [2023-11-26 11:50:33,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928931603] [2023-11-26 11:50:33,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:33,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-26 11:50:33,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-26 11:50:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-11-26 11:50:33,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:33,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 194 transitions, 2802 flow. Second operand has 25 states, 25 states have (on average 10.0) internal successors, (250), 25 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:33,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:33,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:33,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:39,123 INFO L124 PetriNetUnfolderBase]: 12846/24219 cut-off events. [2023-11-26 11:50:39,124 INFO L125 PetriNetUnfolderBase]: For 131356/131356 co-relation queries the response was YES. [2023-11-26 11:50:39,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78419 conditions, 24219 events. 12846/24219 cut-off events. For 131356/131356 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 216854 event pairs, 2265 based on Foata normal form. 30/20018 useless extension candidates. Maximal degree in co-relation 78371. Up to 3728 conditions per place. [2023-11-26 11:50:39,290 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 157 selfloop transitions, 230 changer transitions 86/478 dead transitions. [2023-11-26 11:50:39,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 478 transitions, 5693 flow [2023-11-26 11:50:39,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-26 11:50:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-26 11:50:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 423 transitions. [2023-11-26 11:50:39,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6077586206896551 [2023-11-26 11:50:39,300 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 423 transitions. [2023-11-26 11:50:39,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 423 transitions. [2023-11-26 11:50:39,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:39,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 423 transitions. [2023-11-26 11:50:39,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 17.625) internal successors, (423), 24 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:39,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:39,308 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 29.0) internal successors, (725), 25 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:39,308 INFO L175 Difference]: Start difference. First operand has 134 places, 194 transitions, 2802 flow. Second operand 24 states and 423 transitions. [2023-11-26 11:50:39,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 478 transitions, 5693 flow [2023-11-26 11:50:40,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 478 transitions, 5194 flow, removed 234 selfloop flow, removed 14 redundant places. [2023-11-26 11:50:40,233 INFO L231 Difference]: Finished difference. Result has 149 places, 273 transitions, 4453 flow [2023-11-26 11:50:40,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4453, PETRI_PLACES=149, PETRI_TRANSITIONS=273} [2023-11-26 11:50:40,234 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 121 predicate places. [2023-11-26 11:50:40,234 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 273 transitions, 4453 flow [2023-11-26 11:50:40,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.0) internal successors, (250), 25 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:40,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 11:50:40,235 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:50:40,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:50:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:50:40,436 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-26 11:50:40,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:50:40,437 INFO L85 PathProgramCache]: Analyzing trace with hash 782912447, now seen corresponding path program 8 times [2023-11-26 11:50:40,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:50:40,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817258384] [2023-11-26 11:50:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:50:40,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:50:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:50:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-26 11:50:40,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:50:40,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817258384] [2023-11-26 11:50:40,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817258384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:50:40,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800575348] [2023-11-26 11:50:40,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 11:50:40,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:50:40,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:50:40,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:50:40,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcb0af33-9d43-4d2e-b4d5-0153bc91f477/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:50:40,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 11:50:40,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 11:50:40,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-26 11:50:40,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:50:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:50:40,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:50:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:50:40,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800575348] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:50:40,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:50:40,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2023-11-26 11:50:40,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8695175] [2023-11-26 11:50:40,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:50:40,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:50:40,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:50:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:50:40,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:50:40,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2023-11-26 11:50:40,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 273 transitions, 4453 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:40,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 11:50:40,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2023-11-26 11:50:40,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 11:50:49,822 INFO L124 PetriNetUnfolderBase]: 23272/43501 cut-off events. [2023-11-26 11:50:49,822 INFO L125 PetriNetUnfolderBase]: For 215670/215670 co-relation queries the response was YES. [2023-11-26 11:50:50,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141035 conditions, 43501 events. 23272/43501 cut-off events. For 215670/215670 co-relation queries the response was YES. Maximal size of possible extension queue 1734. Compared 424642 event pairs, 5411 based on Foata normal form. 110/35994 useless extension candidates. Maximal degree in co-relation 140980. Up to 13146 conditions per place. [2023-11-26 11:50:50,136 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 209 selfloop transitions, 303 changer transitions 0/517 dead transitions. [2023-11-26 11:50:50,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 517 transitions, 8974 flow [2023-11-26 11:50:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:50:50,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 11:50:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2023-11-26 11:50:50,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6954022988505747 [2023-11-26 11:50:50,143 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 121 transitions. [2023-11-26 11:50:50,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 121 transitions. [2023-11-26 11:50:50,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 11:50:50,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 121 transitions. [2023-11-26 11:50:50,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:50,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:50,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:50:50,150 INFO L175 Difference]: Start difference. First operand has 149 places, 273 transitions, 4453 flow. Second operand 6 states and 121 transitions. [2023-11-26 11:50:50,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 517 transitions, 8974 flow