./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/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_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/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_76f14c4a-6cec-4e3a-bc9f-768215923c0f/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 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:11:01,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:11:01,954 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:11:01,962 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:11:01,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:11:02,001 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:11:02,002 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:11:02,003 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:11:02,004 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:11:02,009 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:11:02,010 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:11:02,011 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:11:02,011 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:11:02,013 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:11:02,013 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:11:02,014 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:11:02,014 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:11:02,015 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:11:02,015 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:11:02,016 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:11:02,016 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:11:02,017 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:11:02,017 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:11:02,017 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:11:02,018 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:11:02,019 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:11:02,019 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:11:02,020 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:11:02,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:02,020 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:11:02,022 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:11:02,022 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:11:02,022 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:11:02,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:11:02,023 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:11:02,023 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:11:02,023 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:11:02,023 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:11:02,024 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:11:02,024 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_76f14c4a-6cec-4e3a-bc9f-768215923c0f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 238e609d3671ff2de494998b0abc6a14651375b5eb423e7b66fc3d987b466268 [2023-11-06 23:11:02,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:11:02,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:11:02,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:11:02,378 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:11:02,378 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:11:02,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2023-11-06 23:11:05,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:11:05,742 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:11:05,743 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2023-11-06 23:11:05,751 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/data/17985e01a/3bc6788eb5f943d299f8dddfc4a5e3f3/FLAG4061d6bd6 [2023-11-06 23:11:05,765 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/data/17985e01a/3bc6788eb5f943d299f8dddfc4a5e3f3 [2023-11-06 23:11:05,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:11:05,769 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:11:05,771 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:05,771 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:11:05,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:11:05,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:05" (1/1) ... [2023-11-06 23:11:05,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd5e682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:05, skipping insertion in model container [2023-11-06 23:11:05,779 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:11:05" (1/1) ... [2023-11-06 23:11:05,817 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:11:06,002 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_76f14c4a-6cec-4e3a-bc9f-768215923c0f/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2023-11-06 23:11:06,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:06,069 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:11:06,098 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_76f14c4a-6cec-4e3a-bc9f-768215923c0f/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c[3107,3120] [2023-11-06 23:11:06,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:11:06,115 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:06,115 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 23:11:06,123 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:11:06,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06 WrapperNode [2023-11-06 23:11:06,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:11:06,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:11:06,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:11:06,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:11:06,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,142 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,179 INFO L138 Inliner]: procedures = 25, calls = 52, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 164 [2023-11-06 23:11:06,180 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:11:06,180 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:11:06,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:11:06,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:11:06,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,214 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,218 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,220 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,225 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:11:06,226 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:11:06,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:11:06,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:11:06,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (1/1) ... [2023-11-06 23:11:06,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:11:06,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:06,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:11:06,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:11:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:11:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:11:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:11:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:11:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 23:11:06,336 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 23:11:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 23:11:06,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 23:11:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-06 23:11:06,337 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-06 23:11:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:11:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 23:11:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 23:11:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:11:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:11:06,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:11:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:11:06,342 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 23:11:06,519 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:11:06,522 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:11:06,886 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:11:06,998 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:11:06,998 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 23:11:07,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:11:07 BoogieIcfgContainer [2023-11-06 23:11:07,001 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:11:07,004 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:11:07,004 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:11:07,007 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:11:07,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:11:05" (1/3) ... [2023-11-06 23:11:07,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44575f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:11:07, skipping insertion in model container [2023-11-06 23:11:07,008 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:11:06" (2/3) ... [2023-11-06 23:11:07,009 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44575f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:11:07, skipping insertion in model container [2023-11-06 23:11:07,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:11:07" (3/3) ... [2023-11-06 23:11:07,010 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2023-11-06 23:11:07,020 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 23:11:07,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:11:07,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:11:07,028 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 23:11:07,131 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-06 23:11:07,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 142 transitions, 305 flow [2023-11-06 23:11:07,249 INFO L124 PetriNetUnfolderBase]: 10/139 cut-off events. [2023-11-06 23:11:07,249 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:11:07,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 139 events. 10/139 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-06 23:11:07,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 142 transitions, 305 flow [2023-11-06 23:11:07,261 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 128 transitions, 274 flow [2023-11-06 23:11:07,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 23:11:07,276 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 128 transitions, 274 flow [2023-11-06 23:11:07,279 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 128 transitions, 274 flow [2023-11-06 23:11:07,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 128 transitions, 274 flow [2023-11-06 23:11:07,325 INFO L124 PetriNetUnfolderBase]: 10/128 cut-off events. [2023-11-06 23:11:07,325 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:11:07,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 128 events. 10/128 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-06 23:11:07,332 INFO L119 LiptonReduction]: Number of co-enabled transitions 1308 [2023-11-06 23:11:13,700 INFO L134 LiptonReduction]: Checked pairs total: 2050 [2023-11-06 23:11:13,701 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-06 23:11:13,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:11:13,725 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;@460b2ec4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:11:13,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 23:11:13,736 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 23:11:13,737 INFO L124 PetriNetUnfolderBase]: 3/23 cut-off events. [2023-11-06 23:11:13,737 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 23:11:13,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:13,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:13,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:13,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:13,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2043584737, now seen corresponding path program 1 times [2023-11-06 23:11:13,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:13,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148976587] [2023-11-06 23:11:13,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:13,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:14,261 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 23:11:14,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:14,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148976587] [2023-11-06 23:11:14,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148976587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:14,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:14,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:11:14,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859066640] [2023-11-06 23:11:14,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:14,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:11:14,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:11:14,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:11:14,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 267 [2023-11-06 23:11:14,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 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 23:11:14,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:14,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 267 [2023-11-06 23:11:14,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:14,571 INFO L124 PetriNetUnfolderBase]: 142/245 cut-off events. [2023-11-06 23:11:14,572 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-06 23:11:14,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 245 events. 142/245 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 913 event pairs, 10 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 412. Up to 89 conditions per place. [2023-11-06 23:11:14,583 INFO L140 encePairwiseOnDemand]: 262/267 looper letters, 40 selfloop transitions, 5 changer transitions 0/47 dead transitions. [2023-11-06 23:11:14,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 214 flow [2023-11-06 23:11:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:11:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:11:14,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 647 transitions. [2023-11-06 23:11:14,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846441947565543 [2023-11-06 23:11:14,605 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 647 transitions. [2023-11-06 23:11:14,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 647 transitions. [2023-11-06 23:11:14,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:14,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 647 transitions. [2023-11-06 23:11:14,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.4) internal successors, (647), 5 states have internal predecessors, (647), 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 23:11:14,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 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 23:11:14,625 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 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 23:11:14,627 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 66 flow. Second operand 5 states and 647 transitions. [2023-11-06 23:11:14,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 214 flow [2023-11-06 23:11:14,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 191 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-11-06 23:11:14,634 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 82 flow [2023-11-06 23:11:14,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-11-06 23:11:14,640 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-06 23:11:14,640 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 82 flow [2023-11-06 23:11:14,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 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 23:11:14,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:14,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:11:14,642 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:14,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash 663576365, now seen corresponding path program 2 times [2023-11-06 23:11:14,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:14,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371387865] [2023-11-06 23:11:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:14,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:14,812 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 23:11:14,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:14,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371387865] [2023-11-06 23:11:14,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371387865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:14,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:14,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:11:14,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414542844] [2023-11-06 23:11:14,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:14,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:11:14,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:11:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:11:14,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 267 [2023-11-06 23:11:14,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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 23:11:14,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:14,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 267 [2023-11-06 23:11:14,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:15,019 INFO L124 PetriNetUnfolderBase]: 186/318 cut-off events. [2023-11-06 23:11:15,019 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-11-06 23:11:15,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 318 events. 186/318 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1054 event pairs, 30 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 452. Up to 147 conditions per place. [2023-11-06 23:11:15,024 INFO L140 encePairwiseOnDemand]: 262/267 looper letters, 38 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2023-11-06 23:11:15,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 229 flow [2023-11-06 23:11:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:11:15,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-06 23:11:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 645 transitions. [2023-11-06 23:11:15,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48314606741573035 [2023-11-06 23:11:15,029 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 645 transitions. [2023-11-06 23:11:15,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 645 transitions. [2023-11-06 23:11:15,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:15,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 645 transitions. [2023-11-06 23:11:15,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 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 23:11:15,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 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 23:11:15,043 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 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 23:11:15,043 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 82 flow. Second operand 5 states and 645 transitions. [2023-11-06 23:11:15,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 229 flow [2023-11-06 23:11:15,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 47 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:11:15,050 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 123 flow [2023-11-06 23:11:15,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-06 23:11:15,056 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 6 predicate places. [2023-11-06 23:11:15,057 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 123 flow [2023-11-06 23:11:15,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 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 23:11:15,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:15,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:15,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:11:15,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:15,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2071263887, now seen corresponding path program 3 times [2023-11-06 23:11:15,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:15,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91812338] [2023-11-06 23:11:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:15,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:15,431 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 23:11:15,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:15,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91812338] [2023-11-06 23:11:15,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91812338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:15,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:15,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:11:15,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090436788] [2023-11-06 23:11:15,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:15,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:11:15,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:15,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:11:15,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:11:15,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 267 [2023-11-06 23:11:15,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 123 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 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 23:11:15,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:15,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 267 [2023-11-06 23:11:15,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:15,707 INFO L124 PetriNetUnfolderBase]: 283/489 cut-off events. [2023-11-06 23:11:15,708 INFO L125 PetriNetUnfolderBase]: For 319/319 co-relation queries the response was YES. [2023-11-06 23:11:15,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1324 conditions, 489 events. 283/489 cut-off events. For 319/319 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1950 event pairs, 14 based on Foata normal form. 24/512 useless extension candidates. Maximal degree in co-relation 781. Up to 182 conditions per place. [2023-11-06 23:11:15,714 INFO L140 encePairwiseOnDemand]: 261/267 looper letters, 44 selfloop transitions, 6 changer transitions 12/64 dead transitions. [2023-11-06 23:11:15,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 64 transitions, 366 flow [2023-11-06 23:11:15,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:11:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 23:11:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 770 transitions. [2023-11-06 23:11:15,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48064918851435706 [2023-11-06 23:11:15,719 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 770 transitions. [2023-11-06 23:11:15,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 770 transitions. [2023-11-06 23:11:15,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:15,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 770 transitions. [2023-11-06 23:11:15,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 128.33333333333334) internal successors, (770), 6 states have internal predecessors, (770), 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 23:11:15,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 states have internal predecessors, (1869), 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 23:11:15,729 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 states have internal predecessors, (1869), 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 23:11:15,729 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 123 flow. Second operand 6 states and 770 transitions. [2023-11-06 23:11:15,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 64 transitions, 366 flow [2023-11-06 23:11:15,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 361 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:11:15,734 INFO L231 Difference]: Finished difference. Result has 43 places, 29 transitions, 128 flow [2023-11-06 23:11:15,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=128, PETRI_PLACES=43, PETRI_TRANSITIONS=29} [2023-11-06 23:11:15,735 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 12 predicate places. [2023-11-06 23:11:15,735 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 29 transitions, 128 flow [2023-11-06 23:11:15,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 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 23:11:15,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:15,736 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] [2023-11-06 23:11:15,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:11:15,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:15,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:15,737 INFO L85 PathProgramCache]: Analyzing trace with hash 121118088, now seen corresponding path program 1 times [2023-11-06 23:11:15,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:15,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952229867] [2023-11-06 23:11:15,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:15,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:15,802 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 23:11:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:15,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952229867] [2023-11-06 23:11:15,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952229867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:15,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:15,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:11:15,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532136041] [2023-11-06 23:11:15,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:15,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:15,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:15,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:15,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:15,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 267 [2023-11-06 23:11:15,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 29 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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 23:11:15,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:15,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 267 [2023-11-06 23:11:15,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:15,902 INFO L124 PetriNetUnfolderBase]: 80/163 cut-off events. [2023-11-06 23:11:15,903 INFO L125 PetriNetUnfolderBase]: For 351/375 co-relation queries the response was YES. [2023-11-06 23:11:15,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 163 events. 80/163 cut-off events. For 351/375 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 463 event pairs, 15 based on Foata normal form. 33/191 useless extension candidates. Maximal degree in co-relation 463. Up to 121 conditions per place. [2023-11-06 23:11:15,906 INFO L140 encePairwiseOnDemand]: 264/267 looper letters, 24 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-11-06 23:11:15,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 175 flow [2023-11-06 23:11:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 23:11:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-11-06 23:11:15,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4893882646691635 [2023-11-06 23:11:15,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-11-06 23:11:15,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-11-06 23:11:15,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:15,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-11-06 23:11:15,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 23:11:15,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 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 23:11:15,915 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 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 23:11:15,915 INFO L175 Difference]: Start difference. First operand has 43 places, 29 transitions, 128 flow. Second operand 3 states and 392 transitions. [2023-11-06 23:11:15,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 175 flow [2023-11-06 23:11:15,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 153 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-11-06 23:11:15,918 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 104 flow [2023-11-06 23:11:15,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-06 23:11:15,919 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 5 predicate places. [2023-11-06 23:11:15,919 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 104 flow [2023-11-06 23:11:15,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 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 23:11:15,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:15,920 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] [2023-11-06 23:11:15,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:11:15,921 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:15,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:15,921 INFO L85 PathProgramCache]: Analyzing trace with hash 447741225, now seen corresponding path program 1 times [2023-11-06 23:11:15,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:15,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115450816] [2023-11-06 23:11:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:15,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:16,045 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 23:11:16,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:16,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115450816] [2023-11-06 23:11:16,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115450816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:16,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:16,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:11:16,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955241608] [2023-11-06 23:11:16,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:16,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:11:16,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:11:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:11:16,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 267 [2023-11-06 23:11:16,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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 23:11:16,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:16,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 267 [2023-11-06 23:11:16,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:16,188 INFO L124 PetriNetUnfolderBase]: 83/178 cut-off events. [2023-11-06 23:11:16,188 INFO L125 PetriNetUnfolderBase]: For 247/289 co-relation queries the response was YES. [2023-11-06 23:11:16,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 178 events. 83/178 cut-off events. For 247/289 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 512 event pairs, 40 based on Foata normal form. 46/217 useless extension candidates. Maximal degree in co-relation 376. Up to 137 conditions per place. [2023-11-06 23:11:16,191 INFO L140 encePairwiseOnDemand]: 263/267 looper letters, 22 selfloop transitions, 2 changer transitions 8/37 dead transitions. [2023-11-06 23:11:16,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 190 flow [2023-11-06 23:11:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:11:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:11:16,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 503 transitions. [2023-11-06 23:11:16,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47097378277153557 [2023-11-06 23:11:16,194 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 503 transitions. [2023-11-06 23:11:16,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 503 transitions. [2023-11-06 23:11:16,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:16,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 503 transitions. [2023-11-06 23:11:16,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 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 23:11:16,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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 23:11:16,201 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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 23:11:16,201 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 104 flow. Second operand 4 states and 503 transitions. [2023-11-06 23:11:16,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 190 flow [2023-11-06 23:11:16,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-06 23:11:16,204 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 116 flow [2023-11-06 23:11:16,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-11-06 23:11:16,205 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 9 predicate places. [2023-11-06 23:11:16,205 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 116 flow [2023-11-06 23:11:16,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 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 23:11:16,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:16,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:16,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:11:16,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:16,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:16,207 INFO L85 PathProgramCache]: Analyzing trace with hash -129897818, now seen corresponding path program 1 times [2023-11-06 23:11:16,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:16,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010049174] [2023-11-06 23:11:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:16,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:17,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:17,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010049174] [2023-11-06 23:11:17,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010049174] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:17,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820276860] [2023-11-06 23:11:17,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:17,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:17,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:17,495 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:17,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:11:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:17,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-06 23:11:17,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:17,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:11:17,738 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-06 23:11:17,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-06 23:11:17,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:11:18,035 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:11:18,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:11:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:18,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:19,034 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~n~0 (+ c_~back~0 1)) (= (mod |c_thread1Thread1of1ForFork1_~cond~0#1| 256) 0) (< c_~back~0 c_~front~0) (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4))) (.cse2 (+ c_~queue~0.offset (* c_~back~0 4)))) (and (forall ((v_ArrVal_110 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_110) c_~queue~0.base))) (or (< 0 (+ c_~sum~0 (select .cse0 .cse1) 1)) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_110 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_110) c_~queue~0.base))) (or (< (+ c_~sum~0 (select .cse3 .cse1)) 2) (not (= (select .cse3 .cse2) 1))))))) (< c_~front~0 0)) is different from false [2023-11-06 23:11:19,703 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:19,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 56 [2023-11-06 23:11:19,723 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:19,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1308 treesize of output 1252 [2023-11-06 23:11:19,775 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:19,776 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 214 [2023-11-06 23:11:19,805 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:19,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 190 [2023-11-06 23:11:19,835 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:19,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 165 [2023-11-06 23:11:20,748 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:20,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 57 [2023-11-06 23:11:20,767 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:11:20,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 660 treesize of output 632 [2023-11-06 23:11:20,817 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:11:20,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 276 [2023-11-06 23:11:20,853 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:11:20,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 272 treesize of output 228 [2023-11-06 23:11:20,889 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:11:20,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 161 [2023-11-06 23:11:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:21,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820276860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:21,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:21,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2023-11-06 23:11:21,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19626724] [2023-11-06 23:11:21,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:21,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-06 23:11:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-06 23:11:21,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=722, Unknown=5, NotChecked=56, Total=930 [2023-11-06 23:11:21,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-11-06 23:11:21,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 116 flow. Second operand has 31 states, 31 states have (on average 67.90322580645162) internal successors, (2105), 31 states have internal predecessors, (2105), 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 23:11:21,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:21,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-11-06 23:11:21,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:27,159 INFO L124 PetriNetUnfolderBase]: 863/1420 cut-off events. [2023-11-06 23:11:27,159 INFO L125 PetriNetUnfolderBase]: For 1202/1202 co-relation queries the response was YES. [2023-11-06 23:11:27,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4230 conditions, 1420 events. 863/1420 cut-off events. For 1202/1202 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6324 event pairs, 19 based on Foata normal form. 118/1536 useless extension candidates. Maximal degree in co-relation 4211. Up to 288 conditions per place. [2023-11-06 23:11:27,170 INFO L140 encePairwiseOnDemand]: 252/267 looper letters, 170 selfloop transitions, 72 changer transitions 29/271 dead transitions. [2023-11-06 23:11:27,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 271 transitions, 1515 flow [2023-11-06 23:11:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-06 23:11:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-06 23:11:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2976 transitions. [2023-11-06 23:11:27,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27185530282269116 [2023-11-06 23:11:27,187 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2976 transitions. [2023-11-06 23:11:27,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2976 transitions. [2023-11-06 23:11:27,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:27,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2976 transitions. [2023-11-06 23:11:27,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 72.58536585365853) internal successors, (2976), 41 states have internal predecessors, (2976), 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 23:11:27,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 267.0) internal successors, (11214), 42 states have internal predecessors, (11214), 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 23:11:27,230 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 267.0) internal successors, (11214), 42 states have internal predecessors, (11214), 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 23:11:27,230 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 116 flow. Second operand 41 states and 2976 transitions. [2023-11-06 23:11:27,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 271 transitions, 1515 flow [2023-11-06 23:11:27,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 271 transitions, 1503 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-06 23:11:27,239 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 706 flow [2023-11-06 23:11:27,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=706, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2023-11-06 23:11:27,240 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 63 predicate places. [2023-11-06 23:11:27,240 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 706 flow [2023-11-06 23:11:27,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 67.90322580645162) internal successors, (2105), 31 states have internal predecessors, (2105), 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 23:11:27,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:27,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:27,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:27,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:27,449 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:27,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:27,449 INFO L85 PathProgramCache]: Analyzing trace with hash -232881401, now seen corresponding path program 2 times [2023-11-06 23:11:27,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:27,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895465476] [2023-11-06 23:11:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:27,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:30,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895465476] [2023-11-06 23:11:30,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895465476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576084283] [2023-11-06 23:11:30,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:11:30,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:30,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:30,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:30,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:11:30,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:11:30,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:30,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:11:30,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:11:30,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:30,624 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:30,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 44 [2023-11-06 23:11:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:11:30,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576084283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:30,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:30,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2023-11-06 23:11:30,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806018512] [2023-11-06 23:11:30,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:30,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 23:11:30,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:30,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 23:11:30,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2023-11-06 23:11:32,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 267 [2023-11-06 23:11:32,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 706 flow. Second operand has 25 states, 25 states have (on average 93.32) internal successors, (2333), 25 states have internal predecessors, (2333), 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 23:11:32,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:32,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 267 [2023-11-06 23:11:32,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:34,482 INFO L124 PetriNetUnfolderBase]: 859/1463 cut-off events. [2023-11-06 23:11:34,482 INFO L125 PetriNetUnfolderBase]: For 11005/11005 co-relation queries the response was YES. [2023-11-06 23:11:34,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7603 conditions, 1463 events. 859/1463 cut-off events. For 11005/11005 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 6585 event pairs, 36 based on Foata normal form. 36/1496 useless extension candidates. Maximal degree in co-relation 6086. Up to 583 conditions per place. [2023-11-06 23:11:34,526 INFO L140 encePairwiseOnDemand]: 255/267 looper letters, 148 selfloop transitions, 71 changer transitions 56/275 dead transitions. [2023-11-06 23:11:34,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 275 transitions, 2469 flow [2023-11-06 23:11:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:11:34,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-06 23:11:34,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2898 transitions. [2023-11-06 23:11:34,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36179775280898874 [2023-11-06 23:11:34,543 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2898 transitions. [2023-11-06 23:11:34,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2898 transitions. [2023-11-06 23:11:34,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:34,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2898 transitions. [2023-11-06 23:11:34,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 96.6) internal successors, (2898), 30 states have internal predecessors, (2898), 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 23:11:34,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 267.0) internal successors, (8277), 31 states have internal predecessors, (8277), 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 23:11:34,573 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 267.0) internal successors, (8277), 31 states have internal predecessors, (8277), 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 23:11:34,573 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 706 flow. Second operand 30 states and 2898 transitions. [2023-11-06 23:11:34,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 275 transitions, 2469 flow [2023-11-06 23:11:34,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 275 transitions, 2137 flow, removed 131 selfloop flow, removed 8 redundant places. [2023-11-06 23:11:34,627 INFO L231 Difference]: Finished difference. Result has 123 places, 125 transitions, 973 flow [2023-11-06 23:11:34,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=973, PETRI_PLACES=123, PETRI_TRANSITIONS=125} [2023-11-06 23:11:34,628 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2023-11-06 23:11:34,629 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 125 transitions, 973 flow [2023-11-06 23:11:34,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 93.32) internal successors, (2333), 25 states have internal predecessors, (2333), 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 23:11:34,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:34,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:34,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 23:11:34,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:34,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:34,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:34,840 INFO L85 PathProgramCache]: Analyzing trace with hash -104902649, now seen corresponding path program 3 times [2023-11-06 23:11:34,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:34,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210966595] [2023-11-06 23:11:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:34,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210966595] [2023-11-06 23:11:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210966595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575092346] [2023-11-06 23:11:37,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:11:37,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:37,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:37,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:37,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:11:37,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 23:11:37,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:37,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 23:11:37,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:37,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:11:37,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 23:11:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:11:37,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:38,134 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:38,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 86 [2023-11-06 23:11:38,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-11-06 23:11:38,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-11-06 23:11:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:11:38,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575092346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:38,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:38,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2023-11-06 23:11:38,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309503725] [2023-11-06 23:11:38,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:38,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 23:11:38,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:38,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 23:11:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=759, Unknown=1, NotChecked=0, Total=870 [2023-11-06 23:11:39,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-11-06 23:11:39,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 125 transitions, 973 flow. Second operand has 30 states, 30 states have (on average 68.03333333333333) internal successors, (2041), 30 states have internal predecessors, (2041), 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 23:11:39,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:39,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-11-06 23:11:39,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:42,726 INFO L124 PetriNetUnfolderBase]: 936/1556 cut-off events. [2023-11-06 23:11:42,726 INFO L125 PetriNetUnfolderBase]: For 13203/13203 co-relation queries the response was YES. [2023-11-06 23:11:42,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 1556 events. 936/1556 cut-off events. For 13203/13203 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6953 event pairs, 40 based on Foata normal form. 28/1582 useless extension candidates. Maximal degree in co-relation 7751. Up to 684 conditions per place. [2023-11-06 23:11:42,746 INFO L140 encePairwiseOnDemand]: 254/267 looper letters, 158 selfloop transitions, 86 changer transitions 23/267 dead transitions. [2023-11-06 23:11:42,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 267 transitions, 2630 flow [2023-11-06 23:11:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 23:11:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 23:11:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2357 transitions. [2023-11-06 23:11:42,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2675065259334922 [2023-11-06 23:11:42,757 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2357 transitions. [2023-11-06 23:11:42,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2357 transitions. [2023-11-06 23:11:42,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:42,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2357 transitions. [2023-11-06 23:11:42,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 71.42424242424242) internal successors, (2357), 33 states have internal predecessors, (2357), 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 23:11:42,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 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 23:11:42,781 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 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 23:11:42,781 INFO L175 Difference]: Start difference. First operand has 123 places, 125 transitions, 973 flow. Second operand 33 states and 2357 transitions. [2023-11-06 23:11:42,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 267 transitions, 2630 flow [2023-11-06 23:11:42,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 267 transitions, 2440 flow, removed 64 selfloop flow, removed 12 redundant places. [2023-11-06 23:11:42,825 INFO L231 Difference]: Finished difference. Result has 147 places, 143 transitions, 1327 flow [2023-11-06 23:11:42,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1327, PETRI_PLACES=147, PETRI_TRANSITIONS=143} [2023-11-06 23:11:42,826 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 116 predicate places. [2023-11-06 23:11:42,826 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 143 transitions, 1327 flow [2023-11-06 23:11:42,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 68.03333333333333) internal successors, (2041), 30 states have internal predecessors, (2041), 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 23:11:42,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:42,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:42,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:43,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:43,034 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:43,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:43,035 INFO L85 PathProgramCache]: Analyzing trace with hash 422753911, now seen corresponding path program 4 times [2023-11-06 23:11:43,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:43,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907513940] [2023-11-06 23:11:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:43,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:43,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:43,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907513940] [2023-11-06 23:11:43,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907513940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:43,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539214543] [2023-11-06 23:11:43,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 23:11:43,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:43,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:43,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:43,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:11:43,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 23:11:43,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:43,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 23:11:43,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:43,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:43,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539214543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:43,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:43,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-06 23:11:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744950591] [2023-11-06 23:11:43,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:11:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:43,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:11:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:11:43,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 267 [2023-11-06 23:11:43,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 143 transitions, 1327 flow. Second operand has 12 states, 12 states have (on average 115.16666666666667) internal successors, (1382), 12 states have internal predecessors, (1382), 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 23:11:43,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:43,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 267 [2023-11-06 23:11:43,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:43,927 INFO L124 PetriNetUnfolderBase]: 387/756 cut-off events. [2023-11-06 23:11:43,927 INFO L125 PetriNetUnfolderBase]: For 8335/8364 co-relation queries the response was YES. [2023-11-06 23:11:43,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4220 conditions, 756 events. 387/756 cut-off events. For 8335/8364 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3490 event pairs, 103 based on Foata normal form. 82/799 useless extension candidates. Maximal degree in co-relation 3799. Up to 412 conditions per place. [2023-11-06 23:11:43,937 INFO L140 encePairwiseOnDemand]: 262/267 looper letters, 58 selfloop transitions, 8 changer transitions 34/125 dead transitions. [2023-11-06 23:11:43,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 125 transitions, 1324 flow [2023-11-06 23:11:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:11:43,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 23:11:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 942 transitions. [2023-11-06 23:11:43,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410112359550562 [2023-11-06 23:11:43,941 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 942 transitions. [2023-11-06 23:11:43,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 942 transitions. [2023-11-06 23:11:43,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:43,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 942 transitions. [2023-11-06 23:11:43,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 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 23:11:43,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 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 23:11:43,960 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 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 23:11:43,968 INFO L175 Difference]: Start difference. First operand has 147 places, 143 transitions, 1327 flow. Second operand 8 states and 942 transitions. [2023-11-06 23:11:43,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 125 transitions, 1324 flow [2023-11-06 23:11:43,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 125 transitions, 1154 flow, removed 41 selfloop flow, removed 21 redundant places. [2023-11-06 23:11:44,001 INFO L231 Difference]: Finished difference. Result has 123 places, 88 transitions, 720 flow [2023-11-06 23:11:44,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=123, PETRI_TRANSITIONS=88} [2023-11-06 23:11:44,003 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 92 predicate places. [2023-11-06 23:11:44,004 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 88 transitions, 720 flow [2023-11-06 23:11:44,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 115.16666666666667) internal successors, (1382), 12 states have internal predecessors, (1382), 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 23:11:44,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:44,005 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] [2023-11-06 23:11:44,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:44,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:44,212 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:44,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1154671592, now seen corresponding path program 5 times [2023-11-06 23:11:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:44,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845996941] [2023-11-06 23:11:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:44,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:45,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:45,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845996941] [2023-11-06 23:11:45,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845996941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:45,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328046854] [2023-11-06 23:11:45,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 23:11:45,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:45,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:45,978 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:45,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:11:46,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 23:11:46,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:11:46,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 23:11:46,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:46,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:11:46,359 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-06 23:11:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:11:46,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:46,659 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:11:46,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 86 [2023-11-06 23:11:46,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2023-11-06 23:11:46,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2023-11-06 23:11:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 23:11:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328046854] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:46,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:46,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 29 [2023-11-06 23:11:46,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959272769] [2023-11-06 23:11:46,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:46,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 23:11:46,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:46,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 23:11:46,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=747, Unknown=8, NotChecked=0, Total=870 [2023-11-06 23:11:47,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 267 [2023-11-06 23:11:47,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 88 transitions, 720 flow. Second operand has 30 states, 30 states have (on average 76.0) internal successors, (2280), 30 states have internal predecessors, (2280), 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 23:11:47,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:47,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 267 [2023-11-06 23:11:47,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:48,910 INFO L124 PetriNetUnfolderBase]: 597/1032 cut-off events. [2023-11-06 23:11:48,910 INFO L125 PetriNetUnfolderBase]: For 5938/5938 co-relation queries the response was YES. [2023-11-06 23:11:48,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5280 conditions, 1032 events. 597/1032 cut-off events. For 5938/5938 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4091 event pairs, 62 based on Foata normal form. 36/1068 useless extension candidates. Maximal degree in co-relation 4775. Up to 402 conditions per place. [2023-11-06 23:11:48,922 INFO L140 encePairwiseOnDemand]: 258/267 looper letters, 79 selfloop transitions, 47 changer transitions 58/184 dead transitions. [2023-11-06 23:11:48,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 184 transitions, 1791 flow [2023-11-06 23:11:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:11:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 23:11:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1196 transitions. [2023-11-06 23:11:48,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29862671660424467 [2023-11-06 23:11:48,926 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1196 transitions. [2023-11-06 23:11:48,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1196 transitions. [2023-11-06 23:11:48,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:48,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1196 transitions. [2023-11-06 23:11:48,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 79.73333333333333) internal successors, (1196), 15 states have internal predecessors, (1196), 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 23:11:48,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 267.0) internal successors, (4272), 16 states have internal predecessors, (4272), 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 23:11:48,936 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 267.0) internal successors, (4272), 16 states have internal predecessors, (4272), 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 23:11:48,936 INFO L175 Difference]: Start difference. First operand has 123 places, 88 transitions, 720 flow. Second operand 15 states and 1196 transitions. [2023-11-06 23:11:48,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 184 transitions, 1791 flow [2023-11-06 23:11:48,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 184 transitions, 1760 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-06 23:11:48,962 INFO L231 Difference]: Finished difference. Result has 117 places, 91 transitions, 843 flow [2023-11-06 23:11:48,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=689, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=843, PETRI_PLACES=117, PETRI_TRANSITIONS=91} [2023-11-06 23:11:48,964 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 86 predicate places. [2023-11-06 23:11:48,964 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 91 transitions, 843 flow [2023-11-06 23:11:48,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 76.0) internal successors, (2280), 30 states have internal predecessors, (2280), 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 23:11:48,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:48,966 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] [2023-11-06 23:11:48,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:49,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:49,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-06 23:11:49,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash 74543896, now seen corresponding path program 6 times [2023-11-06 23:11:49,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:49,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537009823] [2023-11-06 23:11:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:11:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:49,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537009823] [2023-11-06 23:11:49,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537009823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:49,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:49,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:11:49,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341510703] [2023-11-06 23:11:49,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:49,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:11:49,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:49,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:11:49,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:11:49,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 267 [2023-11-06 23:11:49,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 91 transitions, 843 flow. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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 23:11:49,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:49,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 267 [2023-11-06 23:11:49,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:11:49,595 INFO L124 PetriNetUnfolderBase]: 725/1340 cut-off events. [2023-11-06 23:11:49,595 INFO L125 PetriNetUnfolderBase]: For 12486/12580 co-relation queries the response was YES. [2023-11-06 23:11:49,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7303 conditions, 1340 events. 725/1340 cut-off events. For 12486/12580 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6561 event pairs, 118 based on Foata normal form. 70/1350 useless extension candidates. Maximal degree in co-relation 5822. Up to 618 conditions per place. [2023-11-06 23:11:49,614 INFO L140 encePairwiseOnDemand]: 264/267 looper letters, 92 selfloop transitions, 39 changer transitions 0/156 dead transitions. [2023-11-06 23:11:49,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 156 transitions, 1676 flow [2023-11-06 23:11:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:11:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-06 23:11:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-11-06 23:11:49,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028089887640449 [2023-11-06 23:11:49,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-11-06 23:11:49,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-11-06 23:11:49,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:11:49,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-11-06 23:11:49,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 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 23:11:49,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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 23:11:49,620 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 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 23:11:49,620 INFO L175 Difference]: Start difference. First operand has 117 places, 91 transitions, 843 flow. Second operand 4 states and 537 transitions. [2023-11-06 23:11:49,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 156 transitions, 1676 flow [2023-11-06 23:11:49,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 156 transitions, 1517 flow, removed 25 selfloop flow, removed 12 redundant places. [2023-11-06 23:11:49,647 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 1279 flow [2023-11-06 23:11:49,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1279, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2023-11-06 23:11:49,648 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 79 predicate places. [2023-11-06 23:11:49,649 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 1279 flow [2023-11-06 23:11:49,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 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 23:11:49,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:11:49,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:49,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:11:49,650 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 1 more)] === [2023-11-06 23:11:49,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:49,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1287363013, now seen corresponding path program 7 times [2023-11-06 23:11:49,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:49,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897318241] [2023-11-06 23:11:49,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:49,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:51,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897318241] [2023-11-06 23:11:51,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897318241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282622397] [2023-11-06 23:11:51,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 23:11:51,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:51,004 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:51,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:11:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:51,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:11:51,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:51,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:52,308 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-11-06 23:11:52,308 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 126 [2023-11-06 23:11:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:11:53,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282622397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:53,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:53,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 35 [2023-11-06 23:11:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291127461] [2023-11-06 23:11:53,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:53,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-06 23:11:53,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:53,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-06 23:11:53,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2023-11-06 23:11:54,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 267 [2023-11-06 23:11:54,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 124 transitions, 1279 flow. Second operand has 36 states, 36 states have (on average 91.05555555555556) internal successors, (3278), 36 states have internal predecessors, (3278), 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 23:11:54,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:11:54,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 267 [2023-11-06 23:11:54,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:12:13,726 INFO L124 PetriNetUnfolderBase]: 5445/9302 cut-off events. [2023-11-06 23:12:13,727 INFO L125 PetriNetUnfolderBase]: For 77876/77876 co-relation queries the response was YES. [2023-11-06 23:12:13,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53179 conditions, 9302 events. 5445/9302 cut-off events. For 77876/77876 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 59667 event pairs, 218 based on Foata normal form. 582/9884 useless extension candidates. Maximal degree in co-relation 53125. Up to 4152 conditions per place. [2023-11-06 23:12:13,817 INFO L140 encePairwiseOnDemand]: 254/267 looper letters, 728 selfloop transitions, 593 changer transitions 368/1689 dead transitions. [2023-11-06 23:12:13,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1689 transitions, 18057 flow [2023-11-06 23:12:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2023-11-06 23:12:13,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2023-11-06 23:12:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 18006 transitions. [2023-11-06 23:12:13,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35681588490577254 [2023-11-06 23:12:13,856 INFO L72 ComplementDD]: Start complementDD. Operand 189 states and 18006 transitions. [2023-11-06 23:12:13,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 189 states and 18006 transitions. [2023-11-06 23:12:13,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:12:13,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 189 states and 18006 transitions. [2023-11-06 23:12:13,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 190 states, 189 states have (on average 95.26984126984127) internal successors, (18006), 189 states have internal predecessors, (18006), 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 23:12:13,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 190 states, 190 states have (on average 267.0) internal successors, (50730), 190 states have internal predecessors, (50730), 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 23:12:13,988 INFO L81 ComplementDD]: Finished complementDD. Result has 190 states, 190 states have (on average 267.0) internal successors, (50730), 190 states have internal predecessors, (50730), 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 23:12:13,988 INFO L175 Difference]: Start difference. First operand has 110 places, 124 transitions, 1279 flow. Second operand 189 states and 18006 transitions. [2023-11-06 23:12:13,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1689 transitions, 18057 flow [2023-11-06 23:12:14,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 1689 transitions, 18021 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-11-06 23:12:14,215 INFO L231 Difference]: Finished difference. Result has 339 places, 700 transitions, 9575 flow [2023-11-06 23:12:14,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=189, PETRI_FLOW=9575, PETRI_PLACES=339, PETRI_TRANSITIONS=700} [2023-11-06 23:12:14,216 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 308 predicate places. [2023-11-06 23:12:14,217 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 700 transitions, 9575 flow [2023-11-06 23:12:14,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 91.05555555555556) internal successors, (3278), 36 states have internal predecessors, (3278), 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 23:12:14,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:12:14,218 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:14,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:14,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:14,432 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 1 more)] === [2023-11-06 23:12:14,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash -849427815, now seen corresponding path program 8 times [2023-11-06 23:12:14,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:14,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518306097] [2023-11-06 23:12:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:14,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:12:15,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:15,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518306097] [2023-11-06 23:12:15,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518306097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:15,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958276520] [2023-11-06 23:12:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:12:15,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:15,709 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:15,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:12:15,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:12:15,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:15,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-06 23:12:15,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:16,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 23:12:16,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:12:16,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:12:16,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 23:12:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:12:16,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:18,125 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~back~0 1)) (.cse1 (+ c_~front~0 1))) (or (< .cse0 c_~front~0) (< c_~n~0 .cse1) (= c_~front~0 .cse0) (= (mod c_~v_assert~0 256) 0) (let ((.cse8 (* c_~front~0 4)) (.cse9 (* c_~back~0 4))) (let ((.cse5 (+ c_~queue~0.offset .cse9 4)) (.cse6 (+ c_~queue~0.offset .cse9)) (.cse3 (+ c_~queue~0.offset .cse8 4)) (.cse4 (+ c_~queue~0.offset .cse8))) (and (forall ((v_ArrVal_350 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_350) c_~queue~0.base))) (or (< (+ c_~sum~0 (select .cse2 .cse3) (select .cse2 .cse4)) 2) (not (= (+ (select .cse2 .cse5) 1) 0)) (not (= (select .cse2 .cse6) 1))))) (forall ((v_ArrVal_350 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_350) c_~queue~0.base))) (or (not (= (+ (select .cse7 .cse5) 1) 0)) (not (= (select .cse7 .cse6) 1)) (< 0 (+ c_~sum~0 (select .cse7 .cse3) (select .cse7 .cse4) 1)))))))) (= .cse1 c_~n~0) (< c_~front~0 0))) is different from false [2023-11-06 23:12:18,519 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~back~0 1)) (.cse1 (+ c_~front~0 1))) (or (< .cse0 c_~front~0) (< c_~n~0 .cse1) (= c_~front~0 .cse0) (let ((.cse8 (* c_~front~0 4)) (.cse9 (* c_~back~0 4))) (let ((.cse3 (+ .cse9 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (+ .cse8 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_348 (Array Int Int)) (v_ArrVal_349 (Array Int Int)) (v_ArrVal_350 (Array Int Int))) (let ((.cse2 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_348) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_349) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_350) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (+ (select .cse2 .cse3) 1) 0)) (not (= (select .cse2 .cse4) 1)) (< (+ c_~sum~0 (select .cse2 .cse5) (select .cse2 .cse6)) 2)))) (forall ((v_ArrVal_348 (Array Int Int)) (v_ArrVal_349 (Array Int Int)) (v_ArrVal_350 (Array Int Int))) (let ((.cse7 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_348) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_349) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_350) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (+ (select .cse7 .cse3) 1) 0)) (not (= (select .cse7 .cse4) 1)) (< 0 (+ c_~sum~0 (select .cse7 .cse5) (select .cse7 .cse6) 1)))))))) (= (mod c_~v_assert~0 256) 0) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (= .cse1 c_~n~0) (< c_~front~0 0))) is different from false [2023-11-06 23:12:18,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:18,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 100 [2023-11-06 23:12:18,626 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-06 23:12:18,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4706 treesize of output 4460 [2023-11-06 23:12:18,728 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:12:18,749 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:18,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 410 treesize of output 410 [2023-11-06 23:12:18,802 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-06 23:12:18,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 494 treesize of output 416 [2023-11-06 23:12:18,867 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-11-06 23:12:18,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 331 treesize of output 305 [2023-11-06 23:12:21,541 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:12:21,541 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 99 [2023-11-06 23:12:21,577 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-11-06 23:12:21,578 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2306 treesize of output 2178 [2023-11-06 23:12:21,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:21,624 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:12:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:21,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 410 treesize of output 358 [2023-11-06 23:12:21,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:21,643 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:12:21,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:21,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 358 treesize of output 332 [2023-11-06 23:12:21,684 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-11-06 23:12:21,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 383 treesize of output 287 [2023-11-06 23:12:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-06 23:12:22,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958276520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:12:22,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:12:22,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 39 [2023-11-06 23:12:22,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732041664] [2023-11-06 23:12:22,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:12:22,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-06 23:12:22,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:22,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-06 23:12:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1140, Unknown=8, NotChecked=146, Total=1560 [2023-11-06 23:12:22,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-11-06 23:12:22,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 700 transitions, 9575 flow. Second operand has 40 states, 40 states have (on average 67.75) internal successors, (2710), 40 states have internal predecessors, (2710), 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 23:12:22,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:12:22,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-11-06 23:12:22,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:12:30,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:12:48,461 INFO L124 PetriNetUnfolderBase]: 10486/18020 cut-off events. [2023-11-06 23:12:48,461 INFO L125 PetriNetUnfolderBase]: For 689298/689298 co-relation queries the response was YES. [2023-11-06 23:12:48,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131100 conditions, 18020 events. 10486/18020 cut-off events. For 689298/689298 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 131833 event pairs, 824 based on Foata normal form. 590/18610 useless extension candidates. Maximal degree in co-relation 130467. Up to 7462 conditions per place. [2023-11-06 23:12:48,697 INFO L140 encePairwiseOnDemand]: 253/267 looper letters, 923 selfloop transitions, 1090 changer transitions 1006/3019 dead transitions. [2023-11-06 23:12:48,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 3019 transitions, 42150 flow [2023-11-06 23:12:48,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2023-11-06 23:12:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2023-11-06 23:12:48,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 9794 transitions. [2023-11-06 23:12:48,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2737436413438426 [2023-11-06 23:12:48,722 INFO L72 ComplementDD]: Start complementDD. Operand 134 states and 9794 transitions. [2023-11-06 23:12:48,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 134 states and 9794 transitions. [2023-11-06 23:12:48,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 23:12:48,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 134 states and 9794 transitions. [2023-11-06 23:12:48,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 135 states, 134 states have (on average 73.08955223880596) internal successors, (9794), 134 states have internal predecessors, (9794), 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 23:12:48,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 135 states, 135 states have (on average 267.0) internal successors, (36045), 135 states have internal predecessors, (36045), 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 23:12:48,795 INFO L81 ComplementDD]: Finished complementDD. Result has 135 states, 135 states have (on average 267.0) internal successors, (36045), 135 states have internal predecessors, (36045), 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 23:12:48,795 INFO L175 Difference]: Start difference. First operand has 339 places, 700 transitions, 9575 flow. Second operand 134 states and 9794 transitions. [2023-11-06 23:12:48,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 3019 transitions, 42150 flow [2023-11-06 23:12:55,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 3019 transitions, 34611 flow, removed 2827 selfloop flow, removed 39 redundant places. [2023-11-06 23:12:55,103 INFO L231 Difference]: Finished difference. Result has 499 places, 1455 transitions, 19416 flow [2023-11-06 23:12:55,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=7269, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=134, PETRI_FLOW=19416, PETRI_PLACES=499, PETRI_TRANSITIONS=1455} [2023-11-06 23:12:55,105 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 468 predicate places. [2023-11-06 23:12:55,105 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1455 transitions, 19416 flow [2023-11-06 23:12:55,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 67.75) internal successors, (2710), 40 states have internal predecessors, (2710), 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 23:12:55,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 23:12:55,106 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:55,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:55,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:55,310 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 1 more)] === [2023-11-06 23:12:55,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:55,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1450120415, now seen corresponding path program 9 times [2023-11-06 23:12:55,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:55,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258951074] [2023-11-06 23:12:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:55,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:12:56,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258951074] [2023-11-06 23:12:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258951074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057037951] [2023-11-06 23:12:56,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 23:12:56,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:56,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:56,990 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:56,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76f14c4a-6cec-4e3a-bc9f-768215923c0f/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:12:57,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 23:12:57,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:12:57,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 23:12:57,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:57,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:12:57,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2023-11-06 23:12:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:12:57,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:12:59,722 INFO L322 Elim1Store]: treesize reduction 16, result has 90.5 percent of original size [2023-11-06 23:12:59,723 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 379 treesize of output 403 [2023-11-06 23:12:59,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 184 [2023-11-06 23:12:59,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 178 [2023-11-06 23:12:59,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 172 [2023-11-06 23:12:59,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 166 [2023-11-06 23:14:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:14:27,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057037951] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:14:27,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:14:27,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 37 [2023-11-06 23:14:27,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802870785] [2023-11-06 23:14:27,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:14:27,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-06 23:14:27,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:14:27,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-06 23:14:27,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1178, Unknown=16, NotChecked=0, Total=1406 [2023-11-06 23:14:30,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 267 [2023-11-06 23:14:30,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1455 transitions, 19416 flow. Second operand has 38 states, 38 states have (on average 73.84210526315789) internal successors, (2806), 38 states have internal predecessors, (2806), 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 23:14:30,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 23:14:30,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 267 [2023-11-06 23:14:30,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 23:14:43,217 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~v_assert~0 1) (let ((.cse0 (+ c_~front~0 1))) (or (< c_~n~0 .cse0) (< c_~back~0 .cse0) (let ((.cse1 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_387 (Array Int Int))) (<= (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_387) c_~queue~0.base) .cse1)) 1)) (forall ((v_ArrVal_387 (Array Int Int))) (<= 0 (+ c_~sum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_387) c_~queue~0.base) .cse1)))))) (= (mod |c_thread1Thread1of1ForFork1_~cond~0#1| 256) 0) (< c_~front~0 0))) (<= 0 c_~sum~0) (= |c_thread2Thread1of1ForFork2_~cond~1#1| 1) (<= c_~sum~0 1)) is different from false