./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl --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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:22:13,785 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:22:13,895 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:22:13,899 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:22:13,900 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:22:13,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:22:13,951 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:22:13,952 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:22:13,953 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:22:13,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:22:13,959 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:22:13,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:22:13,960 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:22:13,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:22:13,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:22:13,963 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:22:13,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:22:13,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:22:13,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:22:13,965 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:22:13,965 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:22:13,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:22:13,966 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:22:13,966 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:22:13,967 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:22:13,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:22:13,968 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:22:13,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:22:13,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:13,969 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:22:13,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:22:13,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:22:13,971 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:22:13,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:22:13,972 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:22:13,972 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:22:13,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:22:13,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:22:13,973 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:22:13,973 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_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2023-11-12 02:22:14,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:22:14,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:22:14,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:22:14,258 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:22:14,259 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:22:14,260 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-12 02:22:17,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:22:17,676 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:22:17,677 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2023-11-12 02:22:17,694 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/data/7e8f141f8/592ec7d11f5747aa83851b5ab8236546/FLAG990854805 [2023-11-12 02:22:17,712 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/data/7e8f141f8/592ec7d11f5747aa83851b5ab8236546 [2023-11-12 02:22:17,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:22:17,720 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:22:17,726 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:17,726 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:22:17,732 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:22:17,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:17" (1/1) ... [2023-11-12 02:22:17,735 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a955310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:17, skipping insertion in model container [2023-11-12 02:22:17,736 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:17" (1/1) ... [2023-11-12 02:22:17,781 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:22:17,980 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_f1c00c22-633c-47f0-a083-03157a4d9706/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4643,4656] [2023-11-12 02:22:17,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:18,002 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:22:18,035 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_f1c00c22-633c-47f0-a083-03157a4d9706/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c[4643,4656] [2023-11-12 02:22:18,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:18,049 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:22:18,049 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:22:18,057 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:22:18,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18 WrapperNode [2023-11-12 02:22:18,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:18,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:18,060 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:22:18,060 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:22:18,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,079 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,129 INFO L138 Inliner]: procedures = 25, calls = 68, calls flagged for inlining = 20, calls inlined = 24, statements flattened = 352 [2023-11-12 02:22:18,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:18,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:22:18,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:22:18,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:22:18,141 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,147 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,147 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,167 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:22:18,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:22:18,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:22:18,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:22:18,182 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (1/1) ... [2023-11-12 02:22:18,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:18,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:18,242 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:22:18,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:22:18,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:22:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:22:18,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:22:18,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:22:18,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-12 02:22:18,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-12 02:22:18,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-12 02:22:18,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-12 02:22:18,296 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-12 02:22:18,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-12 02:22:18,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:22:18,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:22:18,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:22:18,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:22:18,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:22:18,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:22:18,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:22:18,302 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:22:18,509 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:22:18,511 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:22:19,226 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:22:19,505 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:22:19,506 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-12 02:22:19,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:19 BoogieIcfgContainer [2023-11-12 02:22:19,510 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:22:19,514 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:22:19,514 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:22:19,518 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:22:19,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:22:17" (1/3) ... [2023-11-12 02:22:19,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27886001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:19, skipping insertion in model container [2023-11-12 02:22:19,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:18" (2/3) ... [2023-11-12 02:22:19,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27886001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:19, skipping insertion in model container [2023-11-12 02:22:19,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:19" (3/3) ... [2023-11-12 02:22:19,524 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2023-11-12 02:22:19,534 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:22:19,545 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:22:19,545 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:22:19,546 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:22:19,656 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:22:19,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 270 transitions, 561 flow [2023-11-12 02:22:19,901 INFO L124 PetriNetUnfolderBase]: 19/267 cut-off events. [2023-11-12 02:22:19,901 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:22:19,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 267 events. 19/267 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 153 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 228. Up to 2 conditions per place. [2023-11-12 02:22:19,910 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 270 transitions, 561 flow [2023-11-12 02:22:19,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 256 transitions, 530 flow [2023-11-12 02:22:19,930 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:22:19,949 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 256 transitions, 530 flow [2023-11-12 02:22:19,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 256 transitions, 530 flow [2023-11-12 02:22:19,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 256 transitions, 530 flow [2023-11-12 02:22:20,038 INFO L124 PetriNetUnfolderBase]: 19/256 cut-off events. [2023-11-12 02:22:20,039 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:22:20,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 256 events. 19/256 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 151 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 228. Up to 2 conditions per place. [2023-11-12 02:22:20,045 INFO L119 LiptonReduction]: Number of co-enabled transitions 1666 [2023-11-12 02:22:31,485 INFO L134 LiptonReduction]: Checked pairs total: 3062 [2023-11-12 02:22:31,485 INFO L136 LiptonReduction]: Total number of compositions: 268 [2023-11-12 02:22:31,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:22:31,521 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;@1e34dd4c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:22:31,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:22:31,532 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:22:31,533 INFO L124 PetriNetUnfolderBase]: 6/32 cut-off events. [2023-11-12 02:22:31,533 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-12 02:22:31,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:31,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:31,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:31,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1127845411, now seen corresponding path program 1 times [2023-11-12 02:22:31,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:31,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641049055] [2023-11-12 02:22:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:31,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:32,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:32,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641049055] [2023-11-12 02:22:32,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641049055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:32,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:32,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:22:32,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168768492] [2023-11-12 02:22:32,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:32,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:32,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:32,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:32,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:32,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 538 [2023-11-12 02:22:32,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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) [2023-11-12 02:22:32,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:32,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 538 [2023-11-12 02:22:32,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:32,630 INFO L124 PetriNetUnfolderBase]: 919/1273 cut-off events. [2023-11-12 02:22:32,630 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-11-12 02:22:32,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2645 conditions, 1273 events. 919/1273 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5058 event pairs, 151 based on Foata normal form. 1/892 useless extension candidates. Maximal degree in co-relation 2229. Up to 1148 conditions per place. [2023-11-12 02:22:32,644 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 42 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2023-11-12 02:22:32,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 227 flow [2023-11-12 02:22:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:32,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:22:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 768 transitions. [2023-11-12 02:22:32,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758364312267658 [2023-11-12 02:22:32,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 768 transitions. [2023-11-12 02:22:32,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 768 transitions. [2023-11-12 02:22:32,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:32,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 768 transitions. [2023-11-12 02:22:32,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 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) [2023-11-12 02:22:32,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-11-12 02:22:32,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-11-12 02:22:32,703 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 84 flow. Second operand 3 states and 768 transitions. [2023-11-12 02:22:32,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 227 flow [2023-11-12 02:22:32,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 205 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-12 02:22:32,712 INFO L231 Difference]: Finished difference. Result has 34 places, 36 transitions, 98 flow [2023-11-12 02:22:32,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=36} [2023-11-12 02:22:32,720 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-12 02:22:32,720 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 36 transitions, 98 flow [2023-11-12 02:22:32,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 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) [2023-11-12 02:22:32,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:32,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:32,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:22:32,723 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:32,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:32,733 INFO L85 PathProgramCache]: Analyzing trace with hash 133898429, now seen corresponding path program 1 times [2023-11-12 02:22:32,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:32,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567637582] [2023-11-12 02:22:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:32,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:32,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567637582] [2023-11-12 02:22:32,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567637582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:32,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:32,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:32,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310398829] [2023-11-12 02:22:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:32,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:32,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:32,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:32,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 538 [2023-11-12 02:22:32,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 36 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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) [2023-11-12 02:22:32,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:32,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 538 [2023-11-12 02:22:32,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:33,253 INFO L124 PetriNetUnfolderBase]: 871/1256 cut-off events. [2023-11-12 02:22:33,253 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2023-11-12 02:22:33,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2846 conditions, 1256 events. 871/1256 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5191 event pairs, 260 based on Foata normal form. 49/1166 useless extension candidates. Maximal degree in co-relation 2202. Up to 943 conditions per place. [2023-11-12 02:22:33,267 INFO L140 encePairwiseOnDemand]: 535/538 looper letters, 48 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-12 02:22:33,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 240 flow [2023-11-12 02:22:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:22:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 763 transitions. [2023-11-12 02:22:33,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47273853779429986 [2023-11-12 02:22:33,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 763 transitions. [2023-11-12 02:22:33,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 763 transitions. [2023-11-12 02:22:33,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:33,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 763 transitions. [2023-11-12 02:22:33,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 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) [2023-11-12 02:22:33,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-11-12 02:22:33,286 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-11-12 02:22:33,287 INFO L175 Difference]: Start difference. First operand has 34 places, 36 transitions, 98 flow. Second operand 3 states and 763 transitions. [2023-11-12 02:22:33,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 240 flow [2023-11-12 02:22:33,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 53 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:33,290 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 102 flow [2023-11-12 02:22:33,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-11-12 02:22:33,291 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2023-11-12 02:22:33,291 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 102 flow [2023-11-12 02:22:33,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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) [2023-11-12 02:22:33,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:33,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:33,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:22:33,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:33,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1030875441, now seen corresponding path program 1 times [2023-11-12 02:22:33,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:33,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855336575] [2023-11-12 02:22:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:33,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:33,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:33,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855336575] [2023-11-12 02:22:33,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855336575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:33,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:33,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:33,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157959471] [2023-11-12 02:22:33,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:33,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:33,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:33,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:33,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:33,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 538 [2023-11-12 02:22:33,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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) [2023-11-12 02:22:33,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:33,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 538 [2023-11-12 02:22:33,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:33,729 INFO L124 PetriNetUnfolderBase]: 932/1341 cut-off events. [2023-11-12 02:22:33,729 INFO L125 PetriNetUnfolderBase]: For 415/415 co-relation queries the response was YES. [2023-11-12 02:22:33,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1341 events. 932/1341 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5566 event pairs, 235 based on Foata normal form. 34/1234 useless extension candidates. Maximal degree in co-relation 2059. Up to 957 conditions per place. [2023-11-12 02:22:33,741 INFO L140 encePairwiseOnDemand]: 535/538 looper letters, 42 selfloop transitions, 2 changer transitions 6/53 dead transitions. [2023-11-12 02:22:33,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 53 transitions, 243 flow [2023-11-12 02:22:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:22:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 765 transitions. [2023-11-12 02:22:33,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4739776951672863 [2023-11-12 02:22:33,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 765 transitions. [2023-11-12 02:22:33,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 765 transitions. [2023-11-12 02:22:33,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:33,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 765 transitions. [2023-11-12 02:22:33,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.0) internal successors, (765), 3 states have internal predecessors, (765), 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) [2023-11-12 02:22:33,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-11-12 02:22:33,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-11-12 02:22:33,756 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 102 flow. Second operand 3 states and 765 transitions. [2023-11-12 02:22:33,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 53 transitions, 243 flow [2023-11-12 02:22:33,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 53 transitions, 241 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:33,759 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 108 flow [2023-11-12 02:22:33,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-11-12 02:22:33,761 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2023-11-12 02:22:33,765 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 108 flow [2023-11-12 02:22:33,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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) [2023-11-12 02:22:33,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:33,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:33,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:22:33,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:33,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1773185919, now seen corresponding path program 1 times [2023-11-12 02:22:33,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:33,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014626571] [2023-11-12 02:22:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:33,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:33,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:33,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:33,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014626571] [2023-11-12 02:22:33,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014626571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:33,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:33,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:22:33,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757699495] [2023-11-12 02:22:33,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:33,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:33,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:33,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:33,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 538 [2023-11-12 02:22:33,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 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) [2023-11-12 02:22:33,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:33,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 538 [2023-11-12 02:22:33,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:34,167 INFO L124 PetriNetUnfolderBase]: 486/724 cut-off events. [2023-11-12 02:22:34,167 INFO L125 PetriNetUnfolderBase]: For 328/328 co-relation queries the response was YES. [2023-11-12 02:22:34,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1814 conditions, 724 events. 486/724 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2547 event pairs, 197 based on Foata normal form. 13/669 useless extension candidates. Maximal degree in co-relation 520. Up to 633 conditions per place. [2023-11-12 02:22:34,173 INFO L140 encePairwiseOnDemand]: 535/538 looper letters, 34 selfloop transitions, 2 changer transitions 7/46 dead transitions. [2023-11-12 02:22:34,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 217 flow [2023-11-12 02:22:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:22:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-11-12 02:22:34,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677819083023544 [2023-11-12 02:22:34,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-11-12 02:22:34,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-11-12 02:22:34,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:34,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-11-12 02:22:34,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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) [2023-11-12 02:22:34,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-11-12 02:22:34,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 538.0) internal successors, (2152), 4 states have internal predecessors, (2152), 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) [2023-11-12 02:22:34,188 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 108 flow. Second operand 3 states and 755 transitions. [2023-11-12 02:22:34,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 217 flow [2023-11-12 02:22:34,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:34,191 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 118 flow [2023-11-12 02:22:34,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-11-12 02:22:34,192 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2023-11-12 02:22:34,192 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 118 flow [2023-11-12 02:22:34,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 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) [2023-11-12 02:22:34,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:34,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:34,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:22:34,194 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:34,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash -511025785, now seen corresponding path program 1 times [2023-11-12 02:22:34,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:34,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518256132] [2023-11-12 02:22:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:34,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:34,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:34,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518256132] [2023-11-12 02:22:34,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518256132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:34,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:34,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:34,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526105085] [2023-11-12 02:22:34,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:34,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:34,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:34,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:34,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:34,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 538 [2023-11-12 02:22:34,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 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) [2023-11-12 02:22:34,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:34,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 538 [2023-11-12 02:22:34,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:34,749 INFO L124 PetriNetUnfolderBase]: 525/815 cut-off events. [2023-11-12 02:22:34,749 INFO L125 PetriNetUnfolderBase]: For 352/352 co-relation queries the response was YES. [2023-11-12 02:22:34,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2072 conditions, 815 events. 525/815 cut-off events. For 352/352 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3189 event pairs, 366 based on Foata normal form. 14/822 useless extension candidates. Maximal degree in co-relation 1318. Up to 718 conditions per place. [2023-11-12 02:22:34,755 INFO L140 encePairwiseOnDemand]: 534/538 looper letters, 33 selfloop transitions, 2 changer transitions 19/57 dead transitions. [2023-11-12 02:22:34,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 57 transitions, 272 flow [2023-11-12 02:22:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 939 transitions. [2023-11-12 02:22:34,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43633828996282525 [2023-11-12 02:22:34,759 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 939 transitions. [2023-11-12 02:22:34,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 939 transitions. [2023-11-12 02:22:34,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:34,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 939 transitions. [2023-11-12 02:22:34,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.75) internal successors, (939), 4 states have internal predecessors, (939), 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) [2023-11-12 02:22:34,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 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) [2023-11-12 02:22:34,772 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 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) [2023-11-12 02:22:34,772 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 118 flow. Second operand 4 states and 939 transitions. [2023-11-12 02:22:34,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 57 transitions, 272 flow [2023-11-12 02:22:34,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:22:34,775 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 130 flow [2023-11-12 02:22:34,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-11-12 02:22:34,777 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 7 predicate places. [2023-11-12 02:22:34,777 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 130 flow [2023-11-12 02:22:34,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 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) [2023-11-12 02:22:34,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:34,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:34,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:22:34,778 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:34,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:34,779 INFO L85 PathProgramCache]: Analyzing trace with hash -602096577, now seen corresponding path program 1 times [2023-11-12 02:22:34,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:34,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259078408] [2023-11-12 02:22:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:34,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:22:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:34,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259078408] [2023-11-12 02:22:34,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259078408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:34,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:34,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545540181] [2023-11-12 02:22:34,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:34,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:34,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:35,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 538 [2023-11-12 02:22:35,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 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) [2023-11-12 02:22:35,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:35,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 538 [2023-11-12 02:22:35,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:35,390 INFO L124 PetriNetUnfolderBase]: 572/896 cut-off events. [2023-11-12 02:22:35,390 INFO L125 PetriNetUnfolderBase]: For 432/432 co-relation queries the response was YES. [2023-11-12 02:22:35,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2297 conditions, 896 events. 572/896 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3663 event pairs, 406 based on Foata normal form. 8/898 useless extension candidates. Maximal degree in co-relation 2277. Up to 716 conditions per place. [2023-11-12 02:22:35,397 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 33 selfloop transitions, 3 changer transitions 23/62 dead transitions. [2023-11-12 02:22:35,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 316 flow [2023-11-12 02:22:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 943 transitions. [2023-11-12 02:22:35,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381970260223048 [2023-11-12 02:22:35,402 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 943 transitions. [2023-11-12 02:22:35,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 943 transitions. [2023-11-12 02:22:35,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:35,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 943 transitions. [2023-11-12 02:22:35,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 235.75) internal successors, (943), 4 states have internal predecessors, (943), 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) [2023-11-12 02:22:35,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 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) [2023-11-12 02:22:35,414 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 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) [2023-11-12 02:22:35,414 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 130 flow. Second operand 4 states and 943 transitions. [2023-11-12 02:22:35,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 316 flow [2023-11-12 02:22:35,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 62 transitions, 308 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-12 02:22:35,417 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 142 flow [2023-11-12 02:22:35,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2023-11-12 02:22:35,419 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 9 predicate places. [2023-11-12 02:22:35,419 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 142 flow [2023-11-12 02:22:35,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 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) [2023-11-12 02:22:35,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:35,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:35,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:22:35,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:35,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:35,421 INFO L85 PathProgramCache]: Analyzing trace with hash -317391252, now seen corresponding path program 1 times [2023-11-12 02:22:35,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:35,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517860338] [2023-11-12 02:22:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:35,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:35,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:35,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517860338] [2023-11-12 02:22:35,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517860338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:35,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:35,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:35,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644581103] [2023-11-12 02:22:35,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:35,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:35,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:35,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 538 [2023-11-12 02:22:35,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 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) [2023-11-12 02:22:35,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:35,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 538 [2023-11-12 02:22:35,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:36,025 INFO L124 PetriNetUnfolderBase]: 547/855 cut-off events. [2023-11-12 02:22:36,025 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2023-11-12 02:22:36,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2181 conditions, 855 events. 547/855 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3470 event pairs, 390 based on Foata normal form. 4/855 useless extension candidates. Maximal degree in co-relation 2153. Up to 714 conditions per place. [2023-11-12 02:22:36,032 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 34 selfloop transitions, 3 changer transitions 17/57 dead transitions. [2023-11-12 02:22:36,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 298 flow [2023-11-12 02:22:36,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:36,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 937 transitions. [2023-11-12 02:22:36,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354089219330855 [2023-11-12 02:22:36,037 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 937 transitions. [2023-11-12 02:22:36,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 937 transitions. [2023-11-12 02:22:36,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:36,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 937 transitions. [2023-11-12 02:22:36,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 234.25) internal successors, (937), 4 states have internal predecessors, (937), 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) [2023-11-12 02:22:36,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 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) [2023-11-12 02:22:36,049 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 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) [2023-11-12 02:22:36,050 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 142 flow. Second operand 4 states and 937 transitions. [2023-11-12 02:22:36,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 298 flow [2023-11-12 02:22:36,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 288 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:36,054 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 150 flow [2023-11-12 02:22:36,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-11-12 02:22:36,055 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 11 predicate places. [2023-11-12 02:22:36,055 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 150 flow [2023-11-12 02:22:36,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.75) internal successors, (915), 4 states have internal predecessors, (915), 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) [2023-11-12 02:22:36,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:36,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:36,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:22:36,056 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:36,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:36,057 INFO L85 PathProgramCache]: Analyzing trace with hash 870757549, now seen corresponding path program 1 times [2023-11-12 02:22:36,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:36,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236287523] [2023-11-12 02:22:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:36,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:36,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:36,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236287523] [2023-11-12 02:22:36,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236287523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:36,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163334661] [2023-11-12 02:22:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:36,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:36,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:36,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:36,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:22:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:36,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:22:36,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:36,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 02:22:37,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163334661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:37,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:37,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-11-12 02:22:37,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941449057] [2023-11-12 02:22:37,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:37,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:22:37,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:37,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:22:37,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:22:37,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 538 [2023-11-12 02:22:37,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 150 flow. Second operand has 13 states, 13 states have (on average 215.23076923076923) internal successors, (2798), 13 states have internal predecessors, (2798), 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) [2023-11-12 02:22:37,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:37,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 538 [2023-11-12 02:22:37,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:37,847 INFO L124 PetriNetUnfolderBase]: 554/873 cut-off events. [2023-11-12 02:22:37,847 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2023-11-12 02:22:37,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2240 conditions, 873 events. 554/873 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3394 event pairs, 234 based on Foata normal form. 8/878 useless extension candidates. Maximal degree in co-relation 1875. Up to 633 conditions per place. [2023-11-12 02:22:37,855 INFO L140 encePairwiseOnDemand]: 531/538 looper letters, 36 selfloop transitions, 4 changer transitions 41/84 dead transitions. [2023-11-12 02:22:37,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 84 transitions, 446 flow [2023-11-12 02:22:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:22:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-12 02:22:37,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1772 transitions. [2023-11-12 02:22:37,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117100371747212 [2023-11-12 02:22:37,864 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1772 transitions. [2023-11-12 02:22:37,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1772 transitions. [2023-11-12 02:22:37,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:37,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1772 transitions. [2023-11-12 02:22:37,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 221.5) internal successors, (1772), 8 states have internal predecessors, (1772), 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) [2023-11-12 02:22:37,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 538.0) internal successors, (4842), 9 states have internal predecessors, (4842), 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) [2023-11-12 02:22:37,884 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 538.0) internal successors, (4842), 9 states have internal predecessors, (4842), 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) [2023-11-12 02:22:37,884 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 150 flow. Second operand 8 states and 1772 transitions. [2023-11-12 02:22:37,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 84 transitions, 446 flow [2023-11-12 02:22:37,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 84 transitions, 429 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-12 02:22:37,889 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 164 flow [2023-11-12 02:22:37,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-11-12 02:22:37,890 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 18 predicate places. [2023-11-12 02:22:37,890 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 164 flow [2023-11-12 02:22:37,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 215.23076923076923) internal successors, (2798), 13 states have internal predecessors, (2798), 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) [2023-11-12 02:22:37,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:37,892 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:37,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:38,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:38,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:38,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:38,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1634155705, now seen corresponding path program 2 times [2023-11-12 02:22:38,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:38,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880950748] [2023-11-12 02:22:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:38,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:22:38,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:38,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880950748] [2023-11-12 02:22:38,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880950748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:38,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:38,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:38,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729656379] [2023-11-12 02:22:38,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:38,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:38,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:38,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:38,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 538 [2023-11-12 02:22:38,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 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) [2023-11-12 02:22:38,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:38,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 538 [2023-11-12 02:22:38,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:38,673 INFO L124 PetriNetUnfolderBase]: 881/1339 cut-off events. [2023-11-12 02:22:38,673 INFO L125 PetriNetUnfolderBase]: For 781/781 co-relation queries the response was YES. [2023-11-12 02:22:38,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3670 conditions, 1339 events. 881/1339 cut-off events. For 781/781 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5071 event pairs, 346 based on Foata normal form. 42/1379 useless extension candidates. Maximal degree in co-relation 3632. Up to 492 conditions per place. [2023-11-12 02:22:38,685 INFO L140 encePairwiseOnDemand]: 533/538 looper letters, 65 selfloop transitions, 9 changer transitions 0/77 dead transitions. [2023-11-12 02:22:38,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 77 transitions, 434 flow [2023-11-12 02:22:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:22:38,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1018 transitions. [2023-11-12 02:22:38,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47304832713754646 [2023-11-12 02:22:38,691 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1018 transitions. [2023-11-12 02:22:38,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1018 transitions. [2023-11-12 02:22:38,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:38,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1018 transitions. [2023-11-12 02:22:38,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 254.5) internal successors, (1018), 4 states have internal predecessors, (1018), 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) [2023-11-12 02:22:38,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 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) [2023-11-12 02:22:38,702 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 538.0) internal successors, (2690), 5 states have internal predecessors, (2690), 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) [2023-11-12 02:22:38,702 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 164 flow. Second operand 4 states and 1018 transitions. [2023-11-12 02:22:38,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 77 transitions, 434 flow [2023-11-12 02:22:38,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 77 transitions, 422 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-12 02:22:38,707 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 221 flow [2023-11-12 02:22:38,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2023-11-12 02:22:38,710 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2023-11-12 02:22:38,710 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 221 flow [2023-11-12 02:22:38,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 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) [2023-11-12 02:22:38,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:38,711 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:38,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:22:38,711 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:38,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:38,712 INFO L85 PathProgramCache]: Analyzing trace with hash 87848521, now seen corresponding path program 1 times [2023-11-12 02:22:38,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:38,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529436829] [2023-11-12 02:22:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:38,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:22:39,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:39,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529436829] [2023-11-12 02:22:39,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529436829] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:39,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475531954] [2023-11-12 02:22:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:39,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:39,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:39,082 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:39,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:22:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:39,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:22:39,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:22:39,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:22:39,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475531954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:39,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:22:39,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-12 02:22:39,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269540702] [2023-11-12 02:22:39,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:39,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:22:39,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:39,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:22:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:22:39,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 538 [2023-11-12 02:22:39,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 221 flow. Second operand has 12 states, 12 states have (on average 218.16666666666666) internal successors, (2618), 12 states have internal predecessors, (2618), 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) [2023-11-12 02:22:39,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:22:39,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 538 [2023-11-12 02:22:39,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:22:40,430 INFO L124 PetriNetUnfolderBase]: 1118/1796 cut-off events. [2023-11-12 02:22:40,430 INFO L125 PetriNetUnfolderBase]: For 2305/2305 co-relation queries the response was YES. [2023-11-12 02:22:40,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5593 conditions, 1796 events. 1118/1796 cut-off events. For 2305/2305 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7848 event pairs, 731 based on Foata normal form. 132/1925 useless extension candidates. Maximal degree in co-relation 5557. Up to 1328 conditions per place. [2023-11-12 02:22:40,446 INFO L140 encePairwiseOnDemand]: 531/538 looper letters, 39 selfloop transitions, 6 changer transitions 44/92 dead transitions. [2023-11-12 02:22:40,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 601 flow [2023-11-12 02:22:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:22:40,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-12 02:22:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1998 transitions. [2023-11-12 02:22:40,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41263940520446096 [2023-11-12 02:22:40,457 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1998 transitions. [2023-11-12 02:22:40,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1998 transitions. [2023-11-12 02:22:40,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:22:40,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1998 transitions. [2023-11-12 02:22:40,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 222.0) internal successors, (1998), 9 states have internal predecessors, (1998), 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) [2023-11-12 02:22:40,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 538.0) internal successors, (5380), 10 states have internal predecessors, (5380), 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) [2023-11-12 02:22:40,483 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 538.0) internal successors, (5380), 10 states have internal predecessors, (5380), 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) [2023-11-12 02:22:40,483 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 221 flow. Second operand 9 states and 1998 transitions. [2023-11-12 02:22:40,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 601 flow [2023-11-12 02:22:40,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 92 transitions, 575 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-11-12 02:22:40,490 INFO L231 Difference]: Finished difference. Result has 64 places, 48 transitions, 237 flow [2023-11-12 02:22:40,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=538, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=237, PETRI_PLACES=64, PETRI_TRANSITIONS=48} [2023-11-12 02:22:40,491 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 27 predicate places. [2023-11-12 02:22:40,491 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 48 transitions, 237 flow [2023-11-12 02:22:40,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 218.16666666666666) internal successors, (2618), 12 states have internal predecessors, (2618), 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) [2023-11-12 02:22:40,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:22:40,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:40,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:40,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:40,701 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-12 02:22:40,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash -673421844, now seen corresponding path program 2 times [2023-11-12 02:22:40,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:40,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765577296] [2023-11-12 02:22:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:40,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:22:46,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:46,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765577296] [2023-11-12 02:22:46,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765577296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:46,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762039276] [2023-11-12 02:22:46,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:22:46,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:46,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:46,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:46,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1c00c22-633c-47f0-a083-03157a4d9706/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:22:46,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:22:46,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:22:46,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-12 02:22:46,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:46,880 INFO L351 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 23 treesize of output 1 [2023-11-12 02:22:46,976 INFO L351 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 8 treesize of output 1 [2023-11-12 02:22:47,098 INFO L351 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 8 treesize of output 1 [2023-11-12 02:22:47,214 INFO L351 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 8 treesize of output 1 [2023-11-12 02:22:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:22:48,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:50,872 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| c_~manager~0.base))) (let ((.cse6 (* c_~client_back~0 4)) (.cse4 (select .cse5 (+ c_~manager~0.offset (* c_~manager_back~0 4))))) (let ((.cse3 (forall ((~client~0.base Int) (~client~0.offset Int)) (let ((.cse7 (select |c_#memory_int| ~client~0.base))) (or (not (= .cse4 (select .cse7 (+ .cse6 ~client~0.offset)))) (= (select .cse7 (+ (* c_~client_front~0 4) ~client~0.offset)) .cse4)))))) (let ((.cse1 (and .cse3 (forall ((~client~0.base Int) (~client~0.offset Int)) (not (= .cse4 (select (select |c_#memory_int| ~client~0.base) (+ .cse6 ~client~0.offset))))))) (.cse0 (= (mod c_~safe~0 256) 0))) (and (or .cse0 (let ((.cse2 (= .cse4 (select .cse5 (+ (* 4 c_~manager_front~0) c_~manager~0.offset))))) (and (or .cse1 .cse2) (or (not .cse2) .cse3)))) (or .cse1 (not .cse0))))))) is different from false