./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:09:01,028 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:09:01,100 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:09:01,106 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:09:01,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:09:01,131 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:09:01,132 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:09:01,133 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:09:01,133 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:09:01,134 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:09:01,135 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:09:01,135 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:09:01,136 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:09:01,136 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:09:01,137 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:09:01,138 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:09:01,138 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:09:01,139 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:09:01,139 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:09:01,139 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:09:01,140 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:09:01,141 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:09:01,141 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:09:01,142 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:09:01,142 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:09:01,142 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:09:01,143 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:09:01,143 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:09:01,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:01,144 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:09:01,145 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:09:01,145 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:09:01,145 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:09:01,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:09:01,146 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:09:01,146 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:09:01,147 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:09:01,147 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:09:01,147 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:09:01,147 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_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f484a00c18d1df7ceedc12992e35584262ebeacdaf88de41be4bc57f4fb5401d [2023-11-06 23:09:01,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:09:01,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:09:01,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:09:01,445 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:09:01,445 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:09:01,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2023-11-06 23:09:04,618 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:09:04,834 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:09:04,835 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2023-11-06 23:09:04,845 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/data/e391768be/ba95e08fee28432187d5ba9cb4f22014/FLAG4a1c030e9 [2023-11-06 23:09:04,859 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/data/e391768be/ba95e08fee28432187d5ba9cb4f22014 [2023-11-06 23:09:04,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:09:04,863 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:09:04,865 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:04,865 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:09:04,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:09:04,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4682ff90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04, skipping insertion in model container [2023-11-06 23:09:04,873 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,903 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:09:05,104 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_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2023-11-06 23:09:05,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:05,126 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:09:05,162 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_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5846,5859] [2023-11-06 23:09:05,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:05,183 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:09:05,183 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:09:05,189 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:09:05,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05 WrapperNode [2023-11-06 23:09:05,190 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:05,191 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:05,192 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:09:05,192 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:09:05,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,224 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,266 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 477 [2023-11-06 23:09:05,266 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:05,267 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:09:05,267 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:09:05,267 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:09:05,277 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,286 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,337 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,340 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,344 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,349 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:09:05,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:09:05,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:09:05,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:09:05,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (1/1) ... [2023-11-06 23:09:05,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:05,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:05,388 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:09:05,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:09:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:09:05,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:09:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:09:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:09:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:09:05,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:09:05,431 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:09:05,431 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:09:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:09:05,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:09:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-06 23:09:05,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-06 23:09:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:09:05,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:09:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:09:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:09:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:09:05,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:09:05,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:09:05,435 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 23:09:05,573 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:09:05,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:09:06,426 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:09:06,825 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:09:06,825 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-11-06 23:09:06,829 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:06 BoogieIcfgContainer [2023-11-06 23:09:06,829 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:09:06,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:09:06,834 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:09:06,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:09:06,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:09:04" (1/3) ... [2023-11-06 23:09:06,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0922eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:06, skipping insertion in model container [2023-11-06 23:09:06,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:05" (2/3) ... [2023-11-06 23:09:06,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0922eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:06, skipping insertion in model container [2023-11-06 23:09:06,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:06" (3/3) ... [2023-11-06 23:09:06,841 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2023-11-06 23:09:06,855 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:09:06,867 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:09:06,867 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:09:06,867 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:09:07,013 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-06 23:09:07,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 346 transitions, 720 flow [2023-11-06 23:09:07,211 INFO L124 PetriNetUnfolderBase]: 25/342 cut-off events. [2023-11-06 23:09:07,211 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 23:09:07,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 342 events. 25/342 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 208 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 301. Up to 2 conditions per place. [2023-11-06 23:09:07,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 346 transitions, 720 flow [2023-11-06 23:09:07,256 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 317 places, 329 transitions, 682 flow [2023-11-06 23:09:07,259 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:09:07,281 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 317 places, 329 transitions, 682 flow [2023-11-06 23:09:07,284 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 317 places, 329 transitions, 682 flow [2023-11-06 23:09:07,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 317 places, 329 transitions, 682 flow [2023-11-06 23:09:07,396 INFO L124 PetriNetUnfolderBase]: 25/329 cut-off events. [2023-11-06 23:09:07,396 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 23:09:07,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 329 events. 25/329 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 207 event pairs, 0 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 301. Up to 2 conditions per place. [2023-11-06 23:09:07,404 INFO L119 LiptonReduction]: Number of co-enabled transitions 2928 [2023-11-06 23:09:22,749 INFO L134 LiptonReduction]: Checked pairs total: 6909 [2023-11-06 23:09:22,750 INFO L136 LiptonReduction]: Total number of compositions: 346 [2023-11-06 23:09:22,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:09:22,774 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=LoopsAndPotentialCycles, 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;@650b4b89, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:09:22,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 23:09:22,784 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:09:22,784 INFO L124 PetriNetUnfolderBase]: 8/40 cut-off events. [2023-11-06 23:09:22,784 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-06 23:09:22,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:22,785 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] [2023-11-06 23:09:22,786 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 2 more)] === [2023-11-06 23:09:22,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1380701242, now seen corresponding path program 1 times [2023-11-06 23:09:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:22,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842938081] [2023-11-06 23:09:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:22,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:23,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:23,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842938081] [2023-11-06 23:09:23,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842938081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:23,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:23,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 23:09:23,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553988028] [2023-11-06 23:09:23,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:23,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:23,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:23,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 306 out of 692 [2023-11-06 23:09:23,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 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) [2023-11-06 23:09:23,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:23,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 306 of 692 [2023-11-06 23:09:23,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:24,226 INFO L124 PetriNetUnfolderBase]: 2346/3110 cut-off events. [2023-11-06 23:09:24,226 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2023-11-06 23:09:24,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 3110 events. 2346/3110 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11909 event pairs, 381 based on Foata normal form. 1/2317 useless extension candidates. Maximal degree in co-relation 5552. Up to 2810 conditions per place. [2023-11-06 23:09:24,254 INFO L140 encePairwiseOnDemand]: 686/692 looper letters, 58 selfloop transitions, 5 changer transitions 1/64 dead transitions. [2023-11-06 23:09:24,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 301 flow [2023-11-06 23:09:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:09:24,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 983 transitions. [2023-11-06 23:09:24,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735067437379576 [2023-11-06 23:09:24,282 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 983 transitions. [2023-11-06 23:09:24,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 983 transitions. [2023-11-06 23:09:24,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:24,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 983 transitions. [2023-11-06 23:09:24,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 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) [2023-11-06 23:09:24,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:24,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:24,309 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 106 flow. Second operand 3 states and 983 transitions. [2023-11-06 23:09:24,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 301 flow [2023-11-06 23:09:24,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-06 23:09:24,318 INFO L231 Difference]: Finished difference. Result has 41 places, 45 transitions, 123 flow [2023-11-06 23:09:24,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=123, PETRI_PLACES=41, PETRI_TRANSITIONS=45} [2023-11-06 23:09:24,325 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-11-06 23:09:24,326 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 123 flow [2023-11-06 23:09:24,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 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) [2023-11-06 23:09:24,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:24,328 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] [2023-11-06 23:09:24,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:09:24,328 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 2 more)] === [2023-11-06 23:09:24,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1490701169, now seen corresponding path program 1 times [2023-11-06 23:09:24,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:24,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667865870] [2023-11-06 23:09:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:24,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:24,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:24,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667865870] [2023-11-06 23:09:24,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667865870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:24,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:24,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:24,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542738633] [2023-11-06 23:09:24,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:24,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:24,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 692 [2023-11-06 23:09:24,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 45 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 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) [2023-11-06 23:09:24,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:24,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 692 [2023-11-06 23:09:24,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:25,193 INFO L124 PetriNetUnfolderBase]: 2852/3828 cut-off events. [2023-11-06 23:09:25,194 INFO L125 PetriNetUnfolderBase]: For 804/804 co-relation queries the response was YES. [2023-11-06 23:09:25,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8820 conditions, 3828 events. 2852/3828 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14675 event pairs, 765 based on Foata normal form. 140/3726 useless extension candidates. Maximal degree in co-relation 6439. Up to 2698 conditions per place. [2023-11-06 23:09:25,223 INFO L140 encePairwiseOnDemand]: 689/692 looper letters, 67 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-06 23:09:25,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 321 flow [2023-11-06 23:09:25,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:09:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 979 transitions. [2023-11-06 23:09:25,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47157996146435455 [2023-11-06 23:09:25,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 979 transitions. [2023-11-06 23:09:25,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 979 transitions. [2023-11-06 23:09:25,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:25,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 979 transitions. [2023-11-06 23:09:25,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.3333333333333) internal successors, (979), 3 states have internal predecessors, (979), 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) [2023-11-06 23:09:25,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:25,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:25,240 INFO L175 Difference]: Start difference. First operand has 41 places, 45 transitions, 123 flow. Second operand 3 states and 979 transitions. [2023-11-06 23:09:25,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 321 flow [2023-11-06 23:09:25,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:25,245 INFO L231 Difference]: Finished difference. Result has 43 places, 45 transitions, 126 flow [2023-11-06 23:09:25,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=43, PETRI_TRANSITIONS=45} [2023-11-06 23:09:25,246 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-11-06 23:09:25,246 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 45 transitions, 126 flow [2023-11-06 23:09:25,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 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) [2023-11-06 23:09:25,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:25,247 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] [2023-11-06 23:09:25,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:09:25,248 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 2 more)] === [2023-11-06 23:09:25,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1629915992, now seen corresponding path program 1 times [2023-11-06 23:09:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:25,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858662999] [2023-11-06 23:09:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:25,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:25,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:25,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858662999] [2023-11-06 23:09:25,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858662999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:25,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:25,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:25,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47234385] [2023-11-06 23:09:25,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:25,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:25,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:25,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:25,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 692 [2023-11-06 23:09:25,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 45 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 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) [2023-11-06 23:09:25,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:25,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 692 [2023-11-06 23:09:25,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:26,037 INFO L124 PetriNetUnfolderBase]: 2676/3626 cut-off events. [2023-11-06 23:09:26,037 INFO L125 PetriNetUnfolderBase]: For 1036/1036 co-relation queries the response was YES. [2023-11-06 23:09:26,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8542 conditions, 3626 events. 2676/3626 cut-off events. For 1036/1036 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13736 event pairs, 689 based on Foata normal form. 132/3522 useless extension candidates. Maximal degree in co-relation 6722. Up to 2700 conditions per place. [2023-11-06 23:09:26,065 INFO L140 encePairwiseOnDemand]: 689/692 looper letters, 67 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-11-06 23:09:26,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 69 transitions, 327 flow [2023-11-06 23:09:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:09:26,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2023-11-06 23:09:26,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720616570327553 [2023-11-06 23:09:26,070 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2023-11-06 23:09:26,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2023-11-06 23:09:26,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:26,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2023-11-06 23:09:26,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 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) [2023-11-06 23:09:26,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:26,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:26,082 INFO L175 Difference]: Start difference. First operand has 43 places, 45 transitions, 126 flow. Second operand 3 states and 980 transitions. [2023-11-06 23:09:26,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 69 transitions, 327 flow [2023-11-06 23:09:26,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 69 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:26,086 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 132 flow [2023-11-06 23:09:26,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-11-06 23:09:26,087 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2023-11-06 23:09:26,087 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 132 flow [2023-11-06 23:09:26,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 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) [2023-11-06 23:09:26,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:26,088 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] [2023-11-06 23:09:26,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:09:26,089 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 2 more)] === [2023-11-06 23:09:26,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1205322476, now seen corresponding path program 1 times [2023-11-06 23:09:26,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:26,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861806272] [2023-11-06 23:09:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:26,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:26,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861806272] [2023-11-06 23:09:26,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861806272] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:26,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:26,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374478422] [2023-11-06 23:09:26,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:26,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:26,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:26,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 692 [2023-11-06 23:09:26,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 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) [2023-11-06 23:09:26,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:26,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 692 [2023-11-06 23:09:26,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:26,957 INFO L124 PetriNetUnfolderBase]: 3151/4249 cut-off events. [2023-11-06 23:09:26,957 INFO L125 PetriNetUnfolderBase]: For 1730/1730 co-relation queries the response was YES. [2023-11-06 23:09:26,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10370 conditions, 4249 events. 3151/4249 cut-off events. For 1730/1730 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15900 event pairs, 896 based on Foata normal form. 104/4093 useless extension candidates. Maximal degree in co-relation 8711. Up to 2724 conditions per place. [2023-11-06 23:09:26,994 INFO L140 encePairwiseOnDemand]: 689/692 looper letters, 60 selfloop transitions, 2 changer transitions 8/70 dead transitions. [2023-11-06 23:09:26,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 335 flow [2023-11-06 23:09:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:09:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 983 transitions. [2023-11-06 23:09:26,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735067437379576 [2023-11-06 23:09:26,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 983 transitions. [2023-11-06 23:09:26,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 983 transitions. [2023-11-06 23:09:27,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:27,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 983 transitions. [2023-11-06 23:09:27,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 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) [2023-11-06 23:09:27,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:27,011 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:27,011 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 132 flow. Second operand 3 states and 983 transitions. [2023-11-06 23:09:27,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 335 flow [2023-11-06 23:09:27,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:27,014 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 138 flow [2023-11-06 23:09:27,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-11-06 23:09:27,016 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-11-06 23:09:27,016 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 138 flow [2023-11-06 23:09:27,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.0) internal successors, (939), 3 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) [2023-11-06 23:09:27,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:27,017 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] [2023-11-06 23:09:27,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:09:27,018 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 2 more)] === [2023-11-06 23:09:27,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:27,018 INFO L85 PathProgramCache]: Analyzing trace with hash 314988094, now seen corresponding path program 1 times [2023-11-06 23:09:27,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:27,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387277251] [2023-11-06 23:09:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:27,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:27,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387277251] [2023-11-06 23:09:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387277251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:27,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:27,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:27,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596061044] [2023-11-06 23:09:27,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:27,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:27,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:27,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:27,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 692 [2023-11-06 23:09:27,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 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) [2023-11-06 23:09:27,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:27,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 692 [2023-11-06 23:09:27,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:27,673 INFO L124 PetriNetUnfolderBase]: 1883/2539 cut-off events. [2023-11-06 23:09:27,673 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2023-11-06 23:09:27,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6357 conditions, 2539 events. 1883/2539 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8427 event pairs, 709 based on Foata normal form. 30/2383 useless extension candidates. Maximal degree in co-relation 1515. Up to 2325 conditions per place. [2023-11-06 23:09:27,696 INFO L140 encePairwiseOnDemand]: 689/692 looper letters, 47 selfloop transitions, 2 changer transitions 9/58 dead transitions. [2023-11-06 23:09:27,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 284 flow [2023-11-06 23:09:27,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:09:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 967 transitions. [2023-11-06 23:09:27,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657996146435453 [2023-11-06 23:09:27,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 967 transitions. [2023-11-06 23:09:27,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 967 transitions. [2023-11-06 23:09:27,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:27,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 967 transitions. [2023-11-06 23:09:27,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 322.3333333333333) internal successors, (967), 3 states have internal predecessors, (967), 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) [2023-11-06 23:09:27,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:27,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 692.0) internal successors, (2768), 4 states have internal predecessors, (2768), 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) [2023-11-06 23:09:27,716 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 138 flow. Second operand 3 states and 967 transitions. [2023-11-06 23:09:27,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 284 flow [2023-11-06 23:09:27,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:27,721 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 148 flow [2023-11-06 23:09:27,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-06 23:09:27,725 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-11-06 23:09:27,726 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 148 flow [2023-11-06 23:09:27,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 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) [2023-11-06 23:09:27,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:27,727 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, 1, 1] [2023-11-06 23:09:27,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:09:27,728 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 2 more)] === [2023-11-06 23:09:27,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash -403529234, now seen corresponding path program 1 times [2023-11-06 23:09:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495813405] [2023-11-06 23:09:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:28,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:28,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495813405] [2023-11-06 23:09:28,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495813405] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:28,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:28,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:28,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451840157] [2023-11-06 23:09:28,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:28,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:28,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:28,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:28,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 692 [2023-11-06 23:09:28,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 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) [2023-11-06 23:09:28,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:28,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 692 [2023-11-06 23:09:28,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:28,784 INFO L124 PetriNetUnfolderBase]: 2006/2759 cut-off events. [2023-11-06 23:09:28,784 INFO L125 PetriNetUnfolderBase]: For 1376/1376 co-relation queries the response was YES. [2023-11-06 23:09:28,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7016 conditions, 2759 events. 2006/2759 cut-off events. For 1376/1376 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9542 event pairs, 1456 based on Foata normal form. 30/2778 useless extension candidates. Maximal degree in co-relation 1716. Up to 2540 conditions per place. [2023-11-06 23:09:28,809 INFO L140 encePairwiseOnDemand]: 682/692 looper letters, 45 selfloop transitions, 2 changer transitions 32/79 dead transitions. [2023-11-06 23:09:28,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 380 flow [2023-11-06 23:09:28,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:09:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:09:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1485 transitions. [2023-11-06 23:09:28,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291907514450867 [2023-11-06 23:09:28,817 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1485 transitions. [2023-11-06 23:09:28,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1485 transitions. [2023-11-06 23:09:28,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:28,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1485 transitions. [2023-11-06 23:09:28,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 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) [2023-11-06 23:09:28,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 692.0) internal successors, (4152), 6 states have internal predecessors, (4152), 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) [2023-11-06 23:09:28,839 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 692.0) internal successors, (4152), 6 states have internal predecessors, (4152), 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) [2023-11-06 23:09:28,839 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 148 flow. Second operand 5 states and 1485 transitions. [2023-11-06 23:09:28,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 380 flow [2023-11-06 23:09:28,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 378 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:09:28,844 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 172 flow [2023-11-06 23:09:28,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2023-11-06 23:09:28,847 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2023-11-06 23:09:28,847 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 172 flow [2023-11-06 23:09:28,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.25) internal successors, (1161), 4 states have internal predecessors, (1161), 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) [2023-11-06 23:09:28,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:28,848 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, 1, 1, 1] [2023-11-06 23:09:28,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:09:28,848 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 2 more)] === [2023-11-06 23:09:28,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:28,849 INFO L85 PathProgramCache]: Analyzing trace with hash -195872514, now seen corresponding path program 1 times [2023-11-06 23:09:28,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:28,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458654061] [2023-11-06 23:09:28,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:28,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:09:29,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458654061] [2023-11-06 23:09:29,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458654061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:29,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:29,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:09:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863818823] [2023-11-06 23:09:29,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:29,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:29,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:29,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:29,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 692 [2023-11-06 23:09:29,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 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) [2023-11-06 23:09:29,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:29,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 692 [2023-11-06 23:09:29,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:29,895 INFO L124 PetriNetUnfolderBase]: 2221/3077 cut-off events. [2023-11-06 23:09:29,896 INFO L125 PetriNetUnfolderBase]: For 1588/1588 co-relation queries the response was YES. [2023-11-06 23:09:29,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7852 conditions, 3077 events. 2221/3077 cut-off events. For 1588/1588 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11025 event pairs, 1633 based on Foata normal form. 18/3091 useless extension candidates. Maximal degree in co-relation 7829. Up to 2538 conditions per place. [2023-11-06 23:09:29,918 INFO L140 encePairwiseOnDemand]: 682/692 looper letters, 44 selfloop transitions, 4 changer transitions 38/86 dead transitions. [2023-11-06 23:09:29,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 86 transitions, 470 flow [2023-11-06 23:09:29,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:09:29,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:09:29,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1492 transitions. [2023-11-06 23:09:29,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43121387283236995 [2023-11-06 23:09:29,925 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1492 transitions. [2023-11-06 23:09:29,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1492 transitions. [2023-11-06 23:09:29,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:29,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1492 transitions. [2023-11-06 23:09:29,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.4) internal successors, (1492), 5 states have internal predecessors, (1492), 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) [2023-11-06 23:09:29,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 692.0) internal successors, (4152), 6 states have internal predecessors, (4152), 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) [2023-11-06 23:09:29,940 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 692.0) internal successors, (4152), 6 states have internal predecessors, (4152), 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) [2023-11-06 23:09:29,941 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 172 flow. Second operand 5 states and 1492 transitions. [2023-11-06 23:09:29,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 86 transitions, 470 flow [2023-11-06 23:09:29,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 86 transitions, 430 flow, removed 19 selfloop flow, removed 3 redundant places. [2023-11-06 23:09:29,946 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 184 flow [2023-11-06 23:09:29,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-11-06 23:09:29,947 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 11 predicate places. [2023-11-06 23:09:29,947 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 184 flow [2023-11-06 23:09:29,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.5) internal successors, (1162), 4 states have internal predecessors, (1162), 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) [2023-11-06 23:09:29,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:29,948 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, 1, 1, 1, 1] [2023-11-06 23:09:29,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:09:29,949 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 2 more)] === [2023-11-06 23:09:29,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash 730733642, now seen corresponding path program 1 times [2023-11-06 23:09:29,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:29,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226430879] [2023-11-06 23:09:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:29,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 23:09:30,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:30,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226430879] [2023-11-06 23:09:30,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226430879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:30,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:30,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:09:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309147327] [2023-11-06 23:09:30,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:30,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:30,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:30,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:30,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 692 [2023-11-06 23:09:30,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 290.75) internal successors, (1163), 4 states have internal predecessors, (1163), 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) [2023-11-06 23:09:30,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:30,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 692 [2023-11-06 23:09:30,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:30,989 INFO L124 PetriNetUnfolderBase]: 2069/2857 cut-off events. [2023-11-06 23:09:30,990 INFO L125 PetriNetUnfolderBase]: For 1407/1407 co-relation queries the response was YES. [2023-11-06 23:09:30,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7270 conditions, 2857 events. 2069/2857 cut-off events. For 1407/1407 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10053 event pairs, 1524 based on Foata normal form. 8/2862 useless extension candidates. Maximal degree in co-relation 7237. Up to 2536 conditions per place. [2023-11-06 23:09:31,009 INFO L140 encePairwiseOnDemand]: 687/692 looper letters, 46 selfloop transitions, 3 changer transitions 24/73 dead transitions. [2023-11-06 23:09:31,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 402 flow [2023-11-06 23:09:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:31,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:09:31,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1195 transitions. [2023-11-06 23:09:31,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43171965317919075 [2023-11-06 23:09:31,016 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1195 transitions. [2023-11-06 23:09:31,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1195 transitions. [2023-11-06 23:09:31,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:31,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1195 transitions. [2023-11-06 23:09:31,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 298.75) internal successors, (1195), 4 states have internal predecessors, (1195), 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) [2023-11-06 23:09:31,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 692.0) internal successors, (3460), 5 states have internal predecessors, (3460), 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) [2023-11-06 23:09:31,030 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 692.0) internal successors, (3460), 5 states have internal predecessors, (3460), 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) [2023-11-06 23:09:31,030 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 184 flow. Second operand 4 states and 1195 transitions. [2023-11-06 23:09:31,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 402 flow [2023-11-06 23:09:31,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 374 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-11-06 23:09:31,035 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 182 flow [2023-11-06 23:09:31,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2023-11-06 23:09:31,038 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 12 predicate places. [2023-11-06 23:09:31,038 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 182 flow [2023-11-06 23:09:31,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 290.75) internal successors, (1163), 4 states have internal predecessors, (1163), 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) [2023-11-06 23:09:31,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:31,040 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, 1, 1, 1, 1, 1] [2023-11-06 23:09:31,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:09:31,040 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 2 more)] === [2023-11-06 23:09:31,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:31,041 INFO L85 PathProgramCache]: Analyzing trace with hash -757673475, now seen corresponding path program 1 times [2023-11-06 23:09:31,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:31,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540521391] [2023-11-06 23:09:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:31,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:09:31,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:31,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540521391] [2023-11-06 23:09:31,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540521391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:31,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:31,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:09:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123475106] [2023-11-06 23:09:31,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:31,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:31,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:31,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:31,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:31,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 692 [2023-11-06 23:09:31,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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) [2023-11-06 23:09:31,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:31,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 692 [2023-11-06 23:09:31,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:32,166 INFO L124 PetriNetUnfolderBase]: 2088/2888 cut-off events. [2023-11-06 23:09:32,167 INFO L125 PetriNetUnfolderBase]: For 1416/1416 co-relation queries the response was YES. [2023-11-06 23:09:32,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7340 conditions, 2888 events. 2088/2888 cut-off events. For 1416/1416 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10134 event pairs, 1540 based on Foata normal form. 12/2897 useless extension candidates. Maximal degree in co-relation 7309. Up to 2534 conditions per place. [2023-11-06 23:09:32,185 INFO L140 encePairwiseOnDemand]: 682/692 looper letters, 42 selfloop transitions, 8 changer transitions 25/75 dead transitions. [2023-11-06 23:09:32,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 406 flow [2023-11-06 23:09:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:09:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:09:32,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1481 transitions. [2023-11-06 23:09:32,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280346820809249 [2023-11-06 23:09:32,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1481 transitions. [2023-11-06 23:09:32,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1481 transitions. [2023-11-06 23:09:32,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:32,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1481 transitions. [2023-11-06 23:09:32,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 296.2) internal successors, (1481), 5 states have internal predecessors, (1481), 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) [2023-11-06 23:09:32,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 692.0) internal successors, (4152), 6 states have internal predecessors, (4152), 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) [2023-11-06 23:09:32,217 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 692.0) internal successors, (4152), 6 states have internal predecessors, (4152), 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) [2023-11-06 23:09:32,225 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 182 flow. Second operand 5 states and 1481 transitions. [2023-11-06 23:09:32,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 406 flow [2023-11-06 23:09:32,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 75 transitions, 394 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-06 23:09:32,231 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 204 flow [2023-11-06 23:09:32,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-11-06 23:09:32,232 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-11-06 23:09:32,232 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 204 flow [2023-11-06 23:09:32,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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) [2023-11-06 23:09:32,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:32,233 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, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:32,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:09:32,234 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 2 more)] === [2023-11-06 23:09:32,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:32,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1663757687, now seen corresponding path program 1 times [2023-11-06 23:09:32,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:32,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273702228] [2023-11-06 23:09:32,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:32,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:09:32,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:32,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273702228] [2023-11-06 23:09:32,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273702228] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:32,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905512051] [2023-11-06 23:09:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:32,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:32,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:32,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:32,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:09:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:32,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:09:32,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:09:32,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:32,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905512051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:32,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:32,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-11-06 23:09:32,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901432390] [2023-11-06 23:09:32,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:32,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:32,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:32,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:32,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:09:32,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 692 [2023-11-06 23:09:32,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 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) [2023-11-06 23:09:32,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:32,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 692 [2023-11-06 23:09:32,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:34,181 INFO L124 PetriNetUnfolderBase]: 5057/6765 cut-off events. [2023-11-06 23:09:34,181 INFO L125 PetriNetUnfolderBase]: For 4010/4010 co-relation queries the response was YES. [2023-11-06 23:09:34,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17736 conditions, 6765 events. 5057/6765 cut-off events. For 4010/4010 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26241 event pairs, 1639 based on Foata normal form. 198/6962 useless extension candidates. Maximal degree in co-relation 17701. Up to 2697 conditions per place. [2023-11-06 23:09:34,228 INFO L140 encePairwiseOnDemand]: 685/692 looper letters, 89 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2023-11-06 23:09:34,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 101 transitions, 574 flow [2023-11-06 23:09:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:34,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:09:34,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1307 transitions. [2023-11-06 23:09:34,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721820809248555 [2023-11-06 23:09:34,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1307 transitions. [2023-11-06 23:09:34,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1307 transitions. [2023-11-06 23:09:34,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:34,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1307 transitions. [2023-11-06 23:09:34,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.75) internal successors, (1307), 4 states have internal predecessors, (1307), 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) [2023-11-06 23:09:34,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 692.0) internal successors, (3460), 5 states have internal predecessors, (3460), 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) [2023-11-06 23:09:34,247 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 692.0) internal successors, (3460), 5 states have internal predecessors, (3460), 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) [2023-11-06 23:09:34,248 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 204 flow. Second operand 4 states and 1307 transitions. [2023-11-06 23:09:34,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 101 transitions, 574 flow [2023-11-06 23:09:34,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 101 transitions, 552 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-06 23:09:34,255 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 272 flow [2023-11-06 23:09:34,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-11-06 23:09:34,256 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 17 predicate places. [2023-11-06 23:09:34,257 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 272 flow [2023-11-06 23:09:34,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 313.25) internal successors, (1253), 4 states have internal predecessors, (1253), 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) [2023-11-06 23:09:34,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:34,258 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, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:34,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:34,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:09:34,475 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 2 more)] === [2023-11-06 23:09:34,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1640184649, now seen corresponding path program 1 times [2023-11-06 23:09:34,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:34,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140152661] [2023-11-06 23:09:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:34,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:09:34,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:34,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140152661] [2023-11-06 23:09:34,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140152661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:34,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307132875] [2023-11-06 23:09:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:34,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:34,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:34,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:34,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:09:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:35,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:09:35,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:09:35,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 23:09:35,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307132875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:35,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:35,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 23:09:35,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175961688] [2023-11-06 23:09:35,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:35,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:09:35,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:35,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:09:35,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:09:35,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 692 [2023-11-06 23:09:35,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 272 flow. Second operand has 12 states, 12 states have (on average 277.1666666666667) internal successors, (3326), 12 states have internal predecessors, (3326), 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) [2023-11-06 23:09:35,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:35,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 692 [2023-11-06 23:09:35,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:37,579 INFO L124 PetriNetUnfolderBase]: 5288/7161 cut-off events. [2023-11-06 23:09:37,579 INFO L125 PetriNetUnfolderBase]: For 6911/6911 co-relation queries the response was YES. [2023-11-06 23:09:37,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21986 conditions, 7161 events. 5288/7161 cut-off events. For 6911/6911 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 28264 event pairs, 3732 based on Foata normal form. 16/7175 useless extension candidates. Maximal degree in co-relation 20958. Up to 6765 conditions per place. [2023-11-06 23:09:37,632 INFO L140 encePairwiseOnDemand]: 686/692 looper letters, 57 selfloop transitions, 3 changer transitions 45/105 dead transitions. [2023-11-06 23:09:37,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 639 flow [2023-11-06 23:09:37,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:09:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:09:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1719 transitions. [2023-11-06 23:09:37,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41401734104046245 [2023-11-06 23:09:37,640 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1719 transitions. [2023-11-06 23:09:37,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1719 transitions. [2023-11-06 23:09:37,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:37,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1719 transitions. [2023-11-06 23:09:37,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 286.5) internal successors, (1719), 6 states have internal predecessors, (1719), 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) [2023-11-06 23:09:37,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 692.0) internal successors, (4844), 7 states have internal predecessors, (4844), 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) [2023-11-06 23:09:37,658 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 692.0) internal successors, (4844), 7 states have internal predecessors, (4844), 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) [2023-11-06 23:09:37,658 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 272 flow. Second operand 6 states and 1719 transitions. [2023-11-06 23:09:37,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 639 flow [2023-11-06 23:09:37,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 631 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-06 23:09:37,672 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 288 flow [2023-11-06 23:09:37,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2023-11-06 23:09:37,673 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-11-06 23:09:37,673 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 288 flow [2023-11-06 23:09:37,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 277.1666666666667) internal successors, (3326), 12 states have internal predecessors, (3326), 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) [2023-11-06 23:09:37,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:37,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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, 1, 1, 1, 1, 1] [2023-11-06 23:09:37,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:37,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:09:37,888 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 23:09:37,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1332439131, now seen corresponding path program 2 times [2023-11-06 23:09:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:37,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497498976] [2023-11-06 23:09:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:37,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:09:38,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:38,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497498976] [2023-11-06 23:09:38,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497498976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:38,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662330764] [2023-11-06 23:09:38,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:09:38,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:38,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:38,287 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:38,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:09:38,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:09:38,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:09:38,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:09:38,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:09:38,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:38,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:09:38,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662330764] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:38,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:38,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2023-11-06 23:09:38,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949789553] [2023-11-06 23:09:38,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:38,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 23:09:38,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 23:09:38,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:09:39,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 692 [2023-11-06 23:09:39,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 288 flow. Second operand has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 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) [2023-11-06 23:09:39,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:39,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 692 [2023-11-06 23:09:39,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:42,969 INFO L124 PetriNetUnfolderBase]: 13117/17921 cut-off events. [2023-11-06 23:09:42,969 INFO L125 PetriNetUnfolderBase]: For 20296/20296 co-relation queries the response was YES. [2023-11-06 23:09:43,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54701 conditions, 17921 events. 13117/17921 cut-off events. For 20296/20296 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 83371 event pairs, 4838 based on Foata normal form. 686/18603 useless extension candidates. Maximal degree in co-relation 54663. Up to 6441 conditions per place. [2023-11-06 23:09:43,139 INFO L140 encePairwiseOnDemand]: 681/692 looper letters, 135 selfloop transitions, 11 changer transitions 140/286 dead transitions. [2023-11-06 23:09:43,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 286 transitions, 1701 flow [2023-11-06 23:09:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:09:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-06 23:09:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 6375 transitions. [2023-11-06 23:09:43,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005403367680322 [2023-11-06 23:09:43,164 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 6375 transitions. [2023-11-06 23:09:43,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 6375 transitions. [2023-11-06 23:09:43,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:43,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 6375 transitions. [2023-11-06 23:09:43,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 277.17391304347825) internal successors, (6375), 23 states have internal predecessors, (6375), 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) [2023-11-06 23:09:43,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 692.0) internal successors, (16608), 24 states have internal predecessors, (16608), 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) [2023-11-06 23:09:43,222 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 692.0) internal successors, (16608), 24 states have internal predecessors, (16608), 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) [2023-11-06 23:09:43,222 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 288 flow. Second operand 23 states and 6375 transitions. [2023-11-06 23:09:43,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 286 transitions, 1701 flow [2023-11-06 23:09:43,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 286 transitions, 1665 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-11-06 23:09:43,248 INFO L231 Difference]: Finished difference. Result has 100 places, 65 transitions, 389 flow [2023-11-06 23:09:43,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=389, PETRI_PLACES=100, PETRI_TRANSITIONS=65} [2023-11-06 23:09:43,249 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2023-11-06 23:09:43,250 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 65 transitions, 389 flow [2023-11-06 23:09:43,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 271.0) internal successors, (4065), 15 states have internal predecessors, (4065), 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) [2023-11-06 23:09:43,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:43,252 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1] [2023-11-06 23:09:43,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:43,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:09:43,459 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 23:09:43,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash -362254181, now seen corresponding path program 1 times [2023-11-06 23:09:43,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:43,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13183268] [2023-11-06 23:09:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 23:09:43,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:43,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13183268] [2023-11-06 23:09:43,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13183268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:43,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180868159] [2023-11-06 23:09:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:43,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:43,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:43,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:09:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:44,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:09:44,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:44,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-06 23:09:44,127 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:44,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180868159] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:44,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:44,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-06 23:09:44,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646644751] [2023-11-06 23:09:44,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:44,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:44,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:44,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:44,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:09:44,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 304 out of 692 [2023-11-06 23:09:44,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 65 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 314.25) internal successors, (1257), 4 states have internal predecessors, (1257), 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) [2023-11-06 23:09:44,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:44,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 304 of 692 [2023-11-06 23:09:44,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:47,903 INFO L124 PetriNetUnfolderBase]: 14602/19725 cut-off events. [2023-11-06 23:09:47,904 INFO L125 PetriNetUnfolderBase]: For 74802/74802 co-relation queries the response was YES. [2023-11-06 23:09:47,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74136 conditions, 19725 events. 14602/19725 cut-off events. For 74802/74802 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 88745 event pairs, 5629 based on Foata normal form. 674/20397 useless extension candidates. Maximal degree in co-relation 74071. Up to 8015 conditions per place. [2023-11-06 23:09:48,064 INFO L140 encePairwiseOnDemand]: 689/692 looper letters, 129 selfloop transitions, 5 changer transitions 0/134 dead transitions. [2023-11-06 23:09:48,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 134 transitions, 1047 flow [2023-11-06 23:09:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:09:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1307 transitions. [2023-11-06 23:09:48,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4721820809248555 [2023-11-06 23:09:48,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1307 transitions. [2023-11-06 23:09:48,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1307 transitions. [2023-11-06 23:09:48,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:48,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1307 transitions. [2023-11-06 23:09:48,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 326.75) internal successors, (1307), 4 states have internal predecessors, (1307), 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) [2023-11-06 23:09:48,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 692.0) internal successors, (3460), 5 states have internal predecessors, (3460), 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) [2023-11-06 23:09:48,082 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 692.0) internal successors, (3460), 5 states have internal predecessors, (3460), 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) [2023-11-06 23:09:48,082 INFO L175 Difference]: Start difference. First operand has 100 places, 65 transitions, 389 flow. Second operand 4 states and 1307 transitions. [2023-11-06 23:09:48,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 134 transitions, 1047 flow [2023-11-06 23:09:48,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 934 flow, removed 51 selfloop flow, removed 13 redundant places. [2023-11-06 23:09:48,141 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 368 flow [2023-11-06 23:09:48,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=368, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2023-11-06 23:09:48,142 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2023-11-06 23:09:48,142 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 368 flow [2023-11-06 23:09:48,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 314.25) internal successors, (1257), 4 states have internal predecessors, (1257), 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) [2023-11-06 23:09:48,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:48,143 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:48,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:48,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:09:48,349 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 23:09:48,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:48,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1727009142, now seen corresponding path program 1 times [2023-11-06 23:09:48,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:48,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858272768] [2023-11-06 23:09:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:48,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:48,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:09:48,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:48,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858272768] [2023-11-06 23:09:48,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858272768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:48,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19412618] [2023-11-06 23:09:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:48,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:48,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:48,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:48,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:09:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:49,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:09:49,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:09:49,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:09:49,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19412618] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:49,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:49,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 23:09:49,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785092646] [2023-11-06 23:09:49,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:49,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:09:49,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:49,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:09:49,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:09:49,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 272 out of 692 [2023-11-06 23:09:49,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 277.4166666666667) internal successors, (3329), 12 states have internal predecessors, (3329), 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) [2023-11-06 23:09:49,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:09:49,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 272 of 692 [2023-11-06 23:09:49,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:09:53,909 INFO L124 PetriNetUnfolderBase]: 17734/24575 cut-off events. [2023-11-06 23:09:53,909 INFO L125 PetriNetUnfolderBase]: For 55209/55209 co-relation queries the response was YES. [2023-11-06 23:09:54,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85505 conditions, 24575 events. 17734/24575 cut-off events. For 55209/55209 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 122374 event pairs, 11863 based on Foata normal form. 1196/25767 useless extension candidates. Maximal degree in co-relation 85451. Up to 19720 conditions per place. [2023-11-06 23:09:54,074 INFO L140 encePairwiseOnDemand]: 684/692 looper letters, 63 selfloop transitions, 6 changer transitions 75/144 dead transitions. [2023-11-06 23:09:54,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 144 transitions, 1039 flow [2023-11-06 23:09:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:09:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-06 23:09:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2821 transitions. [2023-11-06 23:09:54,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40765895953757225 [2023-11-06 23:09:54,087 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2821 transitions. [2023-11-06 23:09:54,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2821 transitions. [2023-11-06 23:09:54,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:09:54,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2821 transitions. [2023-11-06 23:09:54,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 282.1) internal successors, (2821), 10 states have internal predecessors, (2821), 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) [2023-11-06 23:09:54,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 692.0) internal successors, (7612), 11 states have internal predecessors, (7612), 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) [2023-11-06 23:09:54,113 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 692.0) internal successors, (7612), 11 states have internal predecessors, (7612), 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) [2023-11-06 23:09:54,113 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 368 flow. Second operand 10 states and 2821 transitions. [2023-11-06 23:09:54,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 144 transitions, 1039 flow [2023-11-06 23:09:54,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 144 transitions, 1029 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-06 23:09:54,143 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 394 flow [2023-11-06 23:09:54,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=692, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=394, PETRI_PLACES=93, PETRI_TRANSITIONS=69} [2023-11-06 23:09:54,144 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 47 predicate places. [2023-11-06 23:09:54,145 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 394 flow [2023-11-06 23:09:54,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 277.4166666666667) internal successors, (3329), 12 states have internal predecessors, (3329), 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) [2023-11-06 23:09:54,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:09:54,146 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:54,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:54,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:09:54,353 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-06 23:09:54,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:54,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1178041414, now seen corresponding path program 2 times [2023-11-06 23:09:54,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:54,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743598803] [2023-11-06 23:09:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:54,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:10:04,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743598803] [2023-11-06 23:10:04,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743598803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:04,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367676989] [2023-11-06 23:10:04,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:10:04,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:04,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:04,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:04,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_905ea9dd-dbcf-40d0-a69b-2e880fa3d052/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:10:04,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:10:04,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:10:04,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-06 23:10:04,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:10:10,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:43,073 WARN L293 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 2063 DAG size of output: 1847 (called from [L 319] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-11-06 23:11:43,075 INFO L322 Elim1Store]: treesize reduction 754, result has 91.7 percent of original size [2023-11-06 23:11:43,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 34 select indices, 34 select index equivalence classes, 0 disjoint index pairs (out of 561 index pairs), introduced 34 new quantified variables, introduced 561 case distinctions, treesize of input 731 treesize of output 8459