./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-2.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_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/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_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/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_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/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 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:51:55,611 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:51:55,740 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:51:55,750 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:51:55,751 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:51:55,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:51:55,794 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:51:55,795 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:51:55,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:51:55,802 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:51:55,804 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:51:55,804 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:51:55,805 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:51:55,807 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:51:55,808 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:51:55,808 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:51:55,809 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:51:55,809 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:51:55,810 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:51:55,811 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:51:55,811 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:51:55,812 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:51:55,812 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:51:55,813 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:51:55,813 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:51:55,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:51:55,815 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:51:55,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:51:55,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:51:55,817 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:51:55,818 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:51:55,819 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:51:55,819 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:51:55,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:51:55,820 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:51:55,820 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:51:55,820 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:51:55,821 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:51:55,821 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:51:55,821 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_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99c42ba3d1f6c70520bbcf0a3136609166f98fb21063bda215f7779ff0bb27ca [2023-11-06 22:51:56,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:51:56,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:51:56,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:51:56,241 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:51:56,242 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:51:56,243 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2023-11-06 22:51:59,596 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:51:59,804 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:51:59,805 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2023-11-06 22:51:59,818 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/data/10b1e761f/f0523e1ea8ce431e9a0357e875f0d496/FLAG10a803a61 [2023-11-06 22:51:59,834 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/data/10b1e761f/f0523e1ea8ce431e9a0357e875f0d496 [2023-11-06 22:51:59,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:51:59,840 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:51:59,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:51:59,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:51:59,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:51:59,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:59" (1/1) ... [2023-11-06 22:51:59,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@418cacdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:51:59, skipping insertion in model container [2023-11-06 22:51:59,851 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:51:59" (1/1) ... [2023-11-06 22:51:59,882 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:52:00,098 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_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2023-11-06 22:52:00,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:00,130 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:52:00,159 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_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c[2474,2487] [2023-11-06 22:52:00,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:00,190 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:52:00,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00 WrapperNode [2023-11-06 22:52:00,191 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:00,194 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:00,194 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:52:00,194 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:52:00,204 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,224 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,250 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 144 [2023-11-06 22:52:00,251 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:00,252 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:52:00,252 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:52:00,252 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:52:00,261 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,261 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,265 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,289 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,299 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,303 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,319 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:52:00,320 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:52:00,320 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:52:00,320 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:52:00,321 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (1/1) ... [2023-11-06 22:52:00,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:00,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:00,357 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:52:00,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:52:00,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:52:00,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 22:52:00,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 22:52:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 22:52:00,410 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 22:52:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:52:00,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:52:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:52:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:52:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:52:00,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:52:00,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:52:00,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:52:00,416 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 22:52:00,588 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:52:00,591 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:52:01,047 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:52:01,058 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:52:01,059 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 22:52:01,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:01 BoogieIcfgContainer [2023-11-06 22:52:01,062 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:52:01,065 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:52:01,066 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:52:01,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:52:01,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:51:59" (1/3) ... [2023-11-06 22:52:01,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aca438d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:01, skipping insertion in model container [2023-11-06 22:52:01,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:00" (2/3) ... [2023-11-06 22:52:01,072 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aca438d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:01, skipping insertion in model container [2023-11-06 22:52:01,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:01" (3/3) ... [2023-11-06 22:52:01,075 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2023-11-06 22:52:01,087 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:52:01,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:52:01,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:52:01,102 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:52:01,209 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 22:52:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 179 transitions, 372 flow [2023-11-06 22:52:01,443 INFO L124 PetriNetUnfolderBase]: 15/177 cut-off events. [2023-11-06 22:52:01,443 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:52:01,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 177 events. 15/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-11-06 22:52:01,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 179 transitions, 372 flow [2023-11-06 22:52:01,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 168 transitions, 348 flow [2023-11-06 22:52:01,472 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:52:01,492 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 168 transitions, 348 flow [2023-11-06 22:52:01,499 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 168 transitions, 348 flow [2023-11-06 22:52:01,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 168 transitions, 348 flow [2023-11-06 22:52:01,540 INFO L124 PetriNetUnfolderBase]: 15/168 cut-off events. [2023-11-06 22:52:01,540 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:52:01,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 215 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-11-06 22:52:01,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 2960 [2023-11-06 22:52:07,728 INFO L134 LiptonReduction]: Checked pairs total: 3076 [2023-11-06 22:52:07,728 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-11-06 22:52:07,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:52:07,751 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;@516a0862, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:52:07,751 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:52:07,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:52:07,759 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-11-06 22:52:07,759 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:52:07,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:07,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:07,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:07,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:07,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1086006985, now seen corresponding path program 1 times [2023-11-06 22:52:07,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:07,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511084383] [2023-11-06 22:52:07,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:07,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:08,230 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 22:52:08,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:08,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511084383] [2023-11-06 22:52:08,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511084383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:08,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:08,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:52:08,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921257801] [2023-11-06 22:52:08,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:08,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:08,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:08,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:08,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:08,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 378 [2023-11-06 22:52:08,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states 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 22:52:08,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:08,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 378 [2023-11-06 22:52:08,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:08,404 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-11-06 22:52:08,405 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:52:08,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 178 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-11-06 22:52:08,408 INFO L140 encePairwiseOnDemand]: 375/378 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-11-06 22:52:08,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-11-06 22:52:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:52:08,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-11-06 22:52:08,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42504409171075835 [2023-11-06 22:52:08,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-11-06 22:52:08,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-11-06 22:52:08,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:08,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-11-06 22:52:08,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 22:52:08,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states 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 22:52:08,458 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 378.0) internal successors, (1512), 4 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states 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 22:52:08,460 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 482 transitions. [2023-11-06 22:52:08,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-11-06 22:52:08,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-06 22:52:08,467 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-11-06 22:52:08,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-11-06 22:52:08,474 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-11-06 22:52:08,474 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-11-06 22:52:08,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states 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 22:52:08,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:08,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:08,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:52:08,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:08,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:08,477 INFO L85 PathProgramCache]: Analyzing trace with hash 259384800, now seen corresponding path program 1 times [2023-11-06 22:52:08,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:08,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239157950] [2023-11-06 22:52:08,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:08,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:08,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:08,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239157950] [2023-11-06 22:52:08,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239157950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:08,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:08,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:52:08,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704039637] [2023-11-06 22:52:08,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:08,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:52:08,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:52:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:52:09,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 378 [2023-11-06 22:52:09,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 6 states, 6 states have (on average 147.5) internal successors, (885), 6 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 22:52:09,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:09,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 378 [2023-11-06 22:52:09,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:09,333 INFO L124 PetriNetUnfolderBase]: 74/136 cut-off events. [2023-11-06 22:52:09,333 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-06 22:52:09,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 136 events. 74/136 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 375 event pairs, 3 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 276. Up to 85 conditions per place. [2023-11-06 22:52:09,337 INFO L140 encePairwiseOnDemand]: 370/378 looper letters, 33 selfloop transitions, 11 changer transitions 2/46 dead transitions. [2023-11-06 22:52:09,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 46 transitions, 204 flow [2023-11-06 22:52:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:52:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-06 22:52:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 917 transitions. [2023-11-06 22:52:09,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.404320987654321 [2023-11-06 22:52:09,345 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 917 transitions. [2023-11-06 22:52:09,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 917 transitions. [2023-11-06 22:52:09,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:09,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 917 transitions. [2023-11-06 22:52:09,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.83333333333334) internal successors, (917), 6 states have internal predecessors, (917), 0 states have call successors, (0), 0 states 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 22:52:09,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 378.0) internal successors, (2646), 7 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states 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 22:52:09,360 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 378.0) internal successors, (2646), 7 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states 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 22:52:09,360 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 6 states and 917 transitions. [2023-11-06 22:52:09,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 46 transitions, 204 flow [2023-11-06 22:52:09,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 46 transitions, 200 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-06 22:52:09,363 INFO L231 Difference]: Finished difference. Result has 27 places, 28 transitions, 114 flow [2023-11-06 22:52:09,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=27, PETRI_TRANSITIONS=28} [2023-11-06 22:52:09,364 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 6 predicate places. [2023-11-06 22:52:09,364 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 28 transitions, 114 flow [2023-11-06 22:52:09,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 147.5) internal successors, (885), 6 states have internal predecessors, (885), 0 states have call successors, (0), 0 states 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 22:52:09,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:09,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:09,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:52:09,367 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:09,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash 900535078, now seen corresponding path program 2 times [2023-11-06 22:52:09,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:09,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283396874] [2023-11-06 22:52:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:09,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:09,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:09,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283396874] [2023-11-06 22:52:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283396874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:09,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:09,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:52:09,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814381674] [2023-11-06 22:52:09,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:09,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:52:09,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:09,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:52:09,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:52:09,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 378 [2023-11-06 22:52:09,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 28 transitions, 114 flow. Second operand has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 22:52:09,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:09,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 378 [2023-11-06 22:52:09,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:10,029 INFO L124 PetriNetUnfolderBase]: 73/137 cut-off events. [2023-11-06 22:52:10,029 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-06 22:52:10,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 137 events. 73/137 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 379 event pairs, 0 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 395. Up to 85 conditions per place. [2023-11-06 22:52:10,032 INFO L140 encePairwiseOnDemand]: 370/378 looper letters, 32 selfloop transitions, 15 changer transitions 2/49 dead transitions. [2023-11-06 22:52:10,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 49 transitions, 278 flow [2023-11-06 22:52:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:52:10,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-06 22:52:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1082 transitions. [2023-11-06 22:52:10,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4089191232048375 [2023-11-06 22:52:10,039 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1082 transitions. [2023-11-06 22:52:10,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1082 transitions. [2023-11-06 22:52:10,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:10,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1082 transitions. [2023-11-06 22:52:10,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.57142857142858) internal successors, (1082), 7 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states 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 22:52:10,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 378.0) internal successors, (3024), 8 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states 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 22:52:10,055 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 378.0) internal successors, (3024), 8 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states 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 22:52:10,056 INFO L175 Difference]: Start difference. First operand has 27 places, 28 transitions, 114 flow. Second operand 7 states and 1082 transitions. [2023-11-06 22:52:10,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 49 transitions, 278 flow [2023-11-06 22:52:10,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 49 transitions, 270 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-06 22:52:10,060 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 173 flow [2023-11-06 22:52:10,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=173, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-11-06 22:52:10,061 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-11-06 22:52:10,062 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 173 flow [2023-11-06 22:52:10,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 150.5) internal successors, (903), 6 states have internal predecessors, (903), 0 states have call successors, (0), 0 states 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 22:52:10,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:10,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:10,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:52:10,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:10,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:10,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1727665410, now seen corresponding path program 3 times [2023-11-06 22:52:10,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:10,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752294395] [2023-11-06 22:52:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:10,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:10,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:10,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752294395] [2023-11-06 22:52:10,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752294395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:10,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:10,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:52:10,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525650501] [2023-11-06 22:52:10,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:10,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:52:10,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:10,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:52:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:52:10,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 378 [2023-11-06 22:52:10,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 173 flow. Second operand has 6 states, 6 states have (on average 148.5) internal successors, (891), 6 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 22:52:10,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:10,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 378 [2023-11-06 22:52:10,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:10,662 INFO L124 PetriNetUnfolderBase]: 91/173 cut-off events. [2023-11-06 22:52:10,663 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-06 22:52:10,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 173 events. 91/173 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 515 event pairs, 8 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 566. Up to 63 conditions per place. [2023-11-06 22:52:10,666 INFO L140 encePairwiseOnDemand]: 370/378 looper letters, 39 selfloop transitions, 19 changer transitions 2/60 dead transitions. [2023-11-06 22:52:10,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 382 flow [2023-11-06 22:52:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:52:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-06 22:52:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1224 transitions. [2023-11-06 22:52:10,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2023-11-06 22:52:10,674 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1224 transitions. [2023-11-06 22:52:10,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1224 transitions. [2023-11-06 22:52:10,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:10,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1224 transitions. [2023-11-06 22:52:10,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 153.0) internal successors, (1224), 8 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 22:52:10,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 378.0) internal successors, (3402), 9 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states 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 22:52:10,690 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 378.0) internal successors, (3402), 9 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states 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 22:52:10,691 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 173 flow. Second operand 8 states and 1224 transitions. [2023-11-06 22:52:10,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 382 flow [2023-11-06 22:52:10,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 60 transitions, 355 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-06 22:52:10,696 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 232 flow [2023-11-06 22:52:10,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=232, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-11-06 22:52:10,698 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-11-06 22:52:10,698 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 232 flow [2023-11-06 22:52:10,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 148.5) internal successors, (891), 6 states have internal predecessors, (891), 0 states have call successors, (0), 0 states 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 22:52:10,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:10,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:10,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:52:10,700 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:10,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:10,701 INFO L85 PathProgramCache]: Analyzing trace with hash -747709549, now seen corresponding path program 1 times [2023-11-06 22:52:10,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:10,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570769454] [2023-11-06 22:52:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:11,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:11,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570769454] [2023-11-06 22:52:11,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570769454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:11,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741969952] [2023-11-06 22:52:11,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:11,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:11,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:11,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:11,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:52:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:11,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-06 22:52:11,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:11,295 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 22:52:11,352 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 22:52:11,400 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 22:52:11,720 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:52:11,721 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 17 [2023-11-06 22:52:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:11,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:13,013 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:13,013 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 116 treesize of output 80 [2023-11-06 22:52:13,032 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:13,037 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 236 treesize of output 224 [2023-11-06 22:52:13,082 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:13,084 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 240 treesize of output 196 [2023-11-06 22:52:13,115 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:13,115 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 93 [2023-11-06 22:52:14,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:52:14,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741969952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:14,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:14,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-11-06 22:52:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110668967] [2023-11-06 22:52:14,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:14,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:52:14,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:14,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:52:14,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=414, Unknown=7, NotChecked=0, Total=552 [2023-11-06 22:52:16,978 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 22:52:19,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:52:21,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:52:22,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 378 [2023-11-06 22:52:22,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 232 flow. Second operand has 24 states, 24 states have (on average 97.0) internal successors, (2328), 24 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 22:52:22,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:22,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 378 [2023-11-06 22:52:22,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:24,997 INFO L124 PetriNetUnfolderBase]: 346/616 cut-off events. [2023-11-06 22:52:24,998 INFO L125 PetriNetUnfolderBase]: For 909/909 co-relation queries the response was YES. [2023-11-06 22:52:25,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2271 conditions, 616 events. 346/616 cut-off events. For 909/909 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2625 event pairs, 38 based on Foata normal form. 15/629 useless extension candidates. Maximal degree in co-relation 1592. Up to 225 conditions per place. [2023-11-06 22:52:25,005 INFO L140 encePairwiseOnDemand]: 367/378 looper letters, 89 selfloop transitions, 49 changer transitions 61/199 dead transitions. [2023-11-06 22:52:25,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 199 transitions, 1357 flow [2023-11-06 22:52:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:52:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-06 22:52:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2946 transitions. [2023-11-06 22:52:25,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2687465790914067 [2023-11-06 22:52:25,024 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2946 transitions. [2023-11-06 22:52:25,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2946 transitions. [2023-11-06 22:52:25,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:25,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2946 transitions. [2023-11-06 22:52:25,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 101.58620689655173) internal successors, (2946), 29 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states 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 22:52:25,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 378.0) internal successors, (11340), 30 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states 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 22:52:25,068 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 378.0) internal successors, (11340), 30 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states 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 22:52:25,068 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 232 flow. Second operand 29 states and 2946 transitions. [2023-11-06 22:52:25,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 199 transitions, 1357 flow [2023-11-06 22:52:25,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 199 transitions, 1302 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-06 22:52:25,082 INFO L231 Difference]: Finished difference. Result has 82 places, 68 transitions, 578 flow [2023-11-06 22:52:25,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=578, PETRI_PLACES=82, PETRI_TRANSITIONS=68} [2023-11-06 22:52:25,085 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 61 predicate places. [2023-11-06 22:52:25,085 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 68 transitions, 578 flow [2023-11-06 22:52:25,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.0) internal successors, (2328), 24 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states 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 22:52:25,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:25,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:25,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:25,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:25,293 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:25,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:25,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1914537177, now seen corresponding path program 1 times [2023-11-06 22:52:25,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:25,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591478981] [2023-11-06 22:52:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:25,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:25,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:25,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591478981] [2023-11-06 22:52:25,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591478981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:25,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424853750] [2023-11-06 22:52:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:25,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:25,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:25,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:25,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:52:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:25,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:52:25,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:26,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2023-11-06 22:52:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:26,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:26,510 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:52:26,510 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 19 treesize of output 7 [2023-11-06 22:52:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:26,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424853750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:26,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:26,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-11-06 22:52:26,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838675493] [2023-11-06 22:52:26,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:26,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:52:26,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:26,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:52:26,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:52:27,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 378 [2023-11-06 22:52:27,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 68 transitions, 578 flow. Second operand has 12 states, 12 states have (on average 139.5) internal successors, (1674), 12 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states 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 22:52:27,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:27,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 378 [2023-11-06 22:52:27,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:28,346 INFO L124 PetriNetUnfolderBase]: 363/632 cut-off events. [2023-11-06 22:52:28,347 INFO L125 PetriNetUnfolderBase]: For 2563/2563 co-relation queries the response was YES. [2023-11-06 22:52:28,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3124 conditions, 632 events. 363/632 cut-off events. For 2563/2563 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2704 event pairs, 15 based on Foata normal form. 1/631 useless extension candidates. Maximal degree in co-relation 3060. Up to 225 conditions per place. [2023-11-06 22:52:28,356 INFO L140 encePairwiseOnDemand]: 367/378 looper letters, 72 selfloop transitions, 72 changer transitions 4/148 dead transitions. [2023-11-06 22:52:28,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 148 transitions, 1372 flow [2023-11-06 22:52:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:52:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:52:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2020 transitions. [2023-11-06 22:52:28,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.381708238851096 [2023-11-06 22:52:28,366 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2020 transitions. [2023-11-06 22:52:28,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2020 transitions. [2023-11-06 22:52:28,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:28,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2020 transitions. [2023-11-06 22:52:28,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 144.28571428571428) internal successors, (2020), 14 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states 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 22:52:28,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 378.0) internal successors, (5670), 15 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states 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 22:52:28,388 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 378.0) internal successors, (5670), 15 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states 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 22:52:28,388 INFO L175 Difference]: Start difference. First operand has 82 places, 68 transitions, 578 flow. Second operand 14 states and 2020 transitions. [2023-11-06 22:52:28,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 148 transitions, 1372 flow [2023-11-06 22:52:28,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 148 transitions, 1206 flow, removed 67 selfloop flow, removed 12 redundant places. [2023-11-06 22:52:28,413 INFO L231 Difference]: Finished difference. Result has 80 places, 100 transitions, 938 flow [2023-11-06 22:52:28,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=938, PETRI_PLACES=80, PETRI_TRANSITIONS=100} [2023-11-06 22:52:28,414 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 59 predicate places. [2023-11-06 22:52:28,415 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 100 transitions, 938 flow [2023-11-06 22:52:28,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 139.5) internal successors, (1674), 12 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states 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 22:52:28,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:28,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:28,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:28,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:28,625 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:28,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:28,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1120868001, now seen corresponding path program 2 times [2023-11-06 22:52:28,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:28,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090007560] [2023-11-06 22:52:28,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:28,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:29,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090007560] [2023-11-06 22:52:29,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090007560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114790724] [2023-11-06 22:52:29,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:29,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:29,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:29,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:29,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:52:29,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:29,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:29,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:52:29,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:29,473 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2023-11-06 22:52:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:29,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:29,768 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:52:29,769 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 19 treesize of output 7 [2023-11-06 22:52:29,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-06 22:52:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:29,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114790724] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:29,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:29,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2023-11-06 22:52:29,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687567369] [2023-11-06 22:52:29,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:29,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:52:29,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:52:29,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:52:30,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 378 [2023-11-06 22:52:30,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 100 transitions, 938 flow. Second operand has 13 states, 13 states have (on average 139.84615384615384) internal successors, (1818), 13 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states 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 22:52:30,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:30,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 378 [2023-11-06 22:52:30,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:30,937 INFO L124 PetriNetUnfolderBase]: 365/641 cut-off events. [2023-11-06 22:52:30,938 INFO L125 PetriNetUnfolderBase]: For 2888/2888 co-relation queries the response was YES. [2023-11-06 22:52:30,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3301 conditions, 641 events. 365/641 cut-off events. For 2888/2888 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2747 event pairs, 84 based on Foata normal form. 1/642 useless extension candidates. Maximal degree in co-relation 3105. Up to 524 conditions per place. [2023-11-06 22:52:30,946 INFO L140 encePairwiseOnDemand]: 370/378 looper letters, 88 selfloop transitions, 31 changer transitions 4/123 dead transitions. [2023-11-06 22:52:30,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 123 transitions, 1305 flow [2023-11-06 22:52:30,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:52:30,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-06 22:52:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1288 transitions. [2023-11-06 22:52:30,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3786008230452675 [2023-11-06 22:52:30,953 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1288 transitions. [2023-11-06 22:52:30,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1288 transitions. [2023-11-06 22:52:30,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:30,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1288 transitions. [2023-11-06 22:52:30,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 143.11111111111111) internal successors, (1288), 9 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states 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 22:52:30,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 378.0) internal successors, (3780), 10 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states 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 22:52:30,966 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 378.0) internal successors, (3780), 10 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states 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 22:52:30,966 INFO L175 Difference]: Start difference. First operand has 80 places, 100 transitions, 938 flow. Second operand 9 states and 1288 transitions. [2023-11-06 22:52:30,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 123 transitions, 1305 flow [2023-11-06 22:52:30,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 1187 flow, removed 51 selfloop flow, removed 2 redundant places. [2023-11-06 22:52:30,987 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 948 flow [2023-11-06 22:52:30,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=948, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2023-11-06 22:52:30,989 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-11-06 22:52:30,989 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 948 flow [2023-11-06 22:52:30,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 139.84615384615384) internal successors, (1818), 13 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states 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 22:52:30,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:30,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:31,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:31,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:31,197 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:31,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash -971534171, now seen corresponding path program 3 times [2023-11-06 22:52:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:31,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232872971] [2023-11-06 22:52:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:31,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:31,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232872971] [2023-11-06 22:52:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232872971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885652796] [2023-11-06 22:52:31,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:31,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:31,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:31,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:31,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:52:31,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:52:31,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:31,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-06 22:52:31,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:31,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:52:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:31,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:32,046 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:32,046 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 115 treesize of output 107 [2023-11-06 22:52:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:32,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885652796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:32,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:32,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2023-11-06 22:52:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663954138] [2023-11-06 22:52:32,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:32,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:52:32,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:32,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:52:32,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:52:33,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 378 [2023-11-06 22:52:33,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 948 flow. Second operand has 14 states, 14 states have (on average 140.21428571428572) internal successors, (1963), 14 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 22:52:33,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:33,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 378 [2023-11-06 22:52:33,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:33,858 INFO L124 PetriNetUnfolderBase]: 464/856 cut-off events. [2023-11-06 22:52:33,858 INFO L125 PetriNetUnfolderBase]: For 2833/2833 co-relation queries the response was YES. [2023-11-06 22:52:33,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4013 conditions, 856 events. 464/856 cut-off events. For 2833/2833 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4270 event pairs, 6 based on Foata normal form. 2/858 useless extension candidates. Maximal degree in co-relation 3764. Up to 259 conditions per place. [2023-11-06 22:52:33,868 INFO L140 encePairwiseOnDemand]: 368/378 looper letters, 87 selfloop transitions, 108 changer transitions 18/213 dead transitions. [2023-11-06 22:52:33,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 213 transitions, 2069 flow [2023-11-06 22:52:33,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:52:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:52:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2594 transitions. [2023-11-06 22:52:33,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38124632569077016 [2023-11-06 22:52:33,880 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2594 transitions. [2023-11-06 22:52:33,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2594 transitions. [2023-11-06 22:52:33,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:33,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2594 transitions. [2023-11-06 22:52:33,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 144.11111111111111) internal successors, (2594), 18 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states 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 22:52:33,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:52:33,906 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:52:33,906 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 948 flow. Second operand 18 states and 2594 transitions. [2023-11-06 22:52:33,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 213 transitions, 2069 flow [2023-11-06 22:52:33,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 213 transitions, 2005 flow, removed 5 selfloop flow, removed 6 redundant places. [2023-11-06 22:52:33,931 INFO L231 Difference]: Finished difference. Result has 104 places, 150 transitions, 1588 flow [2023-11-06 22:52:33,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1588, PETRI_PLACES=104, PETRI_TRANSITIONS=150} [2023-11-06 22:52:33,932 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 83 predicate places. [2023-11-06 22:52:33,932 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 150 transitions, 1588 flow [2023-11-06 22:52:33,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 140.21428571428572) internal successors, (1963), 14 states have internal predecessors, (1963), 0 states have call successors, (0), 0 states 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 22:52:33,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:33,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:33,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:34,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:34,140 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:34,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:34,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1887612951, now seen corresponding path program 4 times [2023-11-06 22:52:34,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:34,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737794194] [2023-11-06 22:52:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:34,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:34,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737794194] [2023-11-06 22:52:34,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737794194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540987952] [2023-11-06 22:52:34,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:52:34,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:34,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:34,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:34,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:52:34,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:52:34,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:34,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 22:52:34,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:34,871 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 26 treesize of output 24 [2023-11-06 22:52:34,982 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 16 treesize of output 11 [2023-11-06 22:52:35,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2023-11-06 22:52:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:35,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:35,483 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:52:35,483 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 46 treesize of output 30 [2023-11-06 22:52:35,492 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 13 treesize of output 7 [2023-11-06 22:52:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:52:35,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540987952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:35,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:35,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 22:52:35,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259620262] [2023-11-06 22:52:35,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:35,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:52:35,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:35,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:52:35,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:52:36,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 378 [2023-11-06 22:52:36,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 150 transitions, 1588 flow. Second operand has 15 states, 15 states have (on average 134.86666666666667) internal successors, (2023), 15 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states 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 22:52:36,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:36,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 378 [2023-11-06 22:52:36,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:39,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:52:40,119 INFO L124 PetriNetUnfolderBase]: 517/961 cut-off events. [2023-11-06 22:52:40,119 INFO L125 PetriNetUnfolderBase]: For 4347/4347 co-relation queries the response was YES. [2023-11-06 22:52:40,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5147 conditions, 961 events. 517/961 cut-off events. For 4347/4347 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4982 event pairs, 10 based on Foata normal form. 4/965 useless extension candidates. Maximal degree in co-relation 5068. Up to 207 conditions per place. [2023-11-06 22:52:40,160 INFO L140 encePairwiseOnDemand]: 367/378 looper letters, 94 selfloop transitions, 134 changer transitions 13/241 dead transitions. [2023-11-06 22:52:40,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 241 transitions, 2732 flow [2023-11-06 22:52:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 22:52:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-06 22:52:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2379 transitions. [2023-11-06 22:52:40,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37021475256769376 [2023-11-06 22:52:40,172 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2379 transitions. [2023-11-06 22:52:40,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2379 transitions. [2023-11-06 22:52:40,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:40,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2379 transitions. [2023-11-06 22:52:40,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 139.94117647058823) internal successors, (2379), 17 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states 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 22:52:40,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 378.0) internal successors, (6804), 18 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states 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 22:52:40,197 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 378.0) internal successors, (6804), 18 states have internal predecessors, (6804), 0 states have call successors, (0), 0 states 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 22:52:40,197 INFO L175 Difference]: Start difference. First operand has 104 places, 150 transitions, 1588 flow. Second operand 17 states and 2379 transitions. [2023-11-06 22:52:40,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 241 transitions, 2732 flow [2023-11-06 22:52:40,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 241 transitions, 2476 flow, removed 110 selfloop flow, removed 7 redundant places. [2023-11-06 22:52:40,250 INFO L231 Difference]: Finished difference. Result has 117 places, 177 transitions, 2179 flow [2023-11-06 22:52:40,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=1436, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2179, PETRI_PLACES=117, PETRI_TRANSITIONS=177} [2023-11-06 22:52:40,253 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 96 predicate places. [2023-11-06 22:52:40,253 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 177 transitions, 2179 flow [2023-11-06 22:52:40,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 134.86666666666667) internal successors, (2023), 15 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states 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 22:52:40,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:40,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:40,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:40,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:40,465 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:40,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:40,465 INFO L85 PathProgramCache]: Analyzing trace with hash -433717128, now seen corresponding path program 2 times [2023-11-06 22:52:40,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:40,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5069668] [2023-11-06 22:52:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:40,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:40,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:40,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5069668] [2023-11-06 22:52:40,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5069668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:40,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062479040] [2023-11-06 22:52:40,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:40,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:40,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:40,856 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:40,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:52:41,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:41,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:41,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:41,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:41,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062479040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:41,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:41,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:52:41,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175889603] [2023-11-06 22:52:41,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:41,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:52:41,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:52:41,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:52:41,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:52:41,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 177 transitions, 2179 flow. Second operand has 12 states, 12 states have (on average 151.33333333333334) internal successors, (1816), 12 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 22:52:41,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:41,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:52:41,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:42,944 INFO L124 PetriNetUnfolderBase]: 689/1325 cut-off events. [2023-11-06 22:52:42,944 INFO L125 PetriNetUnfolderBase]: For 8567/8567 co-relation queries the response was YES. [2023-11-06 22:52:42,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7694 conditions, 1325 events. 689/1325 cut-off events. For 8567/8567 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7693 event pairs, 97 based on Foata normal form. 40/1365 useless extension candidates. Maximal degree in co-relation 7398. Up to 484 conditions per place. [2023-11-06 22:52:42,963 INFO L140 encePairwiseOnDemand]: 372/378 looper letters, 201 selfloop transitions, 118 changer transitions 1/320 dead transitions. [2023-11-06 22:52:42,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 320 transitions, 4123 flow [2023-11-06 22:52:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:52:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:52:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2965 transitions. [2023-11-06 22:52:42,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41283764967975495 [2023-11-06 22:52:42,970 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2965 transitions. [2023-11-06 22:52:42,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2965 transitions. [2023-11-06 22:52:42,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:42,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2965 transitions. [2023-11-06 22:52:42,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 156.05263157894737) internal successors, (2965), 19 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states 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 22:52:42,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 378.0) internal successors, (7560), 20 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states 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 22:52:42,993 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 378.0) internal successors, (7560), 20 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states 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 22:52:42,993 INFO L175 Difference]: Start difference. First operand has 117 places, 177 transitions, 2179 flow. Second operand 19 states and 2965 transitions. [2023-11-06 22:52:42,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 320 transitions, 4123 flow [2023-11-06 22:52:43,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 320 transitions, 3950 flow, removed 73 selfloop flow, removed 4 redundant places. [2023-11-06 22:52:43,071 INFO L231 Difference]: Finished difference. Result has 144 places, 239 transitions, 3407 flow [2023-11-06 22:52:43,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3407, PETRI_PLACES=144, PETRI_TRANSITIONS=239} [2023-11-06 22:52:43,073 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2023-11-06 22:52:43,074 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 239 transitions, 3407 flow [2023-11-06 22:52:43,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.33333333333334) internal successors, (1816), 12 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 22:52:43,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:43,075 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:43,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:43,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:43,286 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:43,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:43,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1769442642, now seen corresponding path program 3 times [2023-11-06 22:52:43,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:43,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081558765] [2023-11-06 22:52:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:43,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:43,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:43,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081558765] [2023-11-06 22:52:43,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081558765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:43,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186584539] [2023-11-06 22:52:43,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:52:43,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:43,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:43,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:43,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:52:43,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:52:43,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:43,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:43,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:43,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:43,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186584539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:43,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:43,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:52:43,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604116575] [2023-11-06 22:52:43,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:43,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:52:43,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:43,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:52:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:52:44,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:52:44,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 239 transitions, 3407 flow. Second operand has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 22:52:44,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:44,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:52:44,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:45,112 INFO L124 PetriNetUnfolderBase]: 690/1298 cut-off events. [2023-11-06 22:52:45,113 INFO L125 PetriNetUnfolderBase]: For 9553/9553 co-relation queries the response was YES. [2023-11-06 22:52:45,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8285 conditions, 1298 events. 690/1298 cut-off events. For 9553/9553 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7319 event pairs, 95 based on Foata normal form. 18/1315 useless extension candidates. Maximal degree in co-relation 8112. Up to 490 conditions per place. [2023-11-06 22:52:45,136 INFO L140 encePairwiseOnDemand]: 372/378 looper letters, 182 selfloop transitions, 119 changer transitions 1/302 dead transitions. [2023-11-06 22:52:45,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 302 transitions, 4416 flow [2023-11-06 22:52:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:52:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:52:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2345 transitions. [2023-11-06 22:52:45,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41358024691358025 [2023-11-06 22:52:45,142 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2345 transitions. [2023-11-06 22:52:45,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2345 transitions. [2023-11-06 22:52:45,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:45,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2345 transitions. [2023-11-06 22:52:45,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 156.33333333333334) internal successors, (2345), 15 states have internal predecessors, (2345), 0 states have call successors, (0), 0 states 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 22:52:45,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 378.0) internal successors, (6048), 16 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 22:52:45,158 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 378.0) internal successors, (6048), 16 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 22:52:45,159 INFO L175 Difference]: Start difference. First operand has 144 places, 239 transitions, 3407 flow. Second operand 15 states and 2345 transitions. [2023-11-06 22:52:45,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 302 transitions, 4416 flow [2023-11-06 22:52:45,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 302 transitions, 4258 flow, removed 79 selfloop flow, removed 1 redundant places. [2023-11-06 22:52:45,308 INFO L231 Difference]: Finished difference. Result has 158 places, 243 transitions, 3642 flow [2023-11-06 22:52:45,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3642, PETRI_PLACES=158, PETRI_TRANSITIONS=243} [2023-11-06 22:52:45,309 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-11-06 22:52:45,310 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 243 transitions, 3642 flow [2023-11-06 22:52:45,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 22:52:45,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:45,310 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:45,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:45,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:45,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:45,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1927846656, now seen corresponding path program 4 times [2023-11-06 22:52:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:45,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752524581] [2023-11-06 22:52:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:45,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:45,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:45,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752524581] [2023-11-06 22:52:45,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752524581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:45,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714700397] [2023-11-06 22:52:45,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:52:45,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:45,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:45,831 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:45,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:52:46,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:52:46,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:46,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:46,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:46,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:46,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714700397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:46,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:46,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 22:52:46,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741865008] [2023-11-06 22:52:46,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:46,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:52:46,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:52:46,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:52:46,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:52:46,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 243 transitions, 3642 flow. Second operand has 13 states, 13 states have (on average 150.92307692307693) internal successors, (1962), 13 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states 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 22:52:46,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:46,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:52:46,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:48,203 INFO L124 PetriNetUnfolderBase]: 1137/2173 cut-off events. [2023-11-06 22:52:48,203 INFO L125 PetriNetUnfolderBase]: For 17056/17056 co-relation queries the response was YES. [2023-11-06 22:52:48,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14290 conditions, 2173 events. 1137/2173 cut-off events. For 17056/17056 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13690 event pairs, 45 based on Foata normal form. 16/2188 useless extension candidates. Maximal degree in co-relation 13982. Up to 557 conditions per place. [2023-11-06 22:52:48,247 INFO L140 encePairwiseOnDemand]: 371/378 looper letters, 233 selfloop transitions, 233 changer transitions 0/466 dead transitions. [2023-11-06 22:52:48,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 466 transitions, 7301 flow [2023-11-06 22:52:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-06 22:52:48,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-06 22:52:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2973 transitions. [2023-11-06 22:52:48,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139515455304929 [2023-11-06 22:52:48,262 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2973 transitions. [2023-11-06 22:52:48,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2973 transitions. [2023-11-06 22:52:48,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:48,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2973 transitions. [2023-11-06 22:52:48,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 156.47368421052633) internal successors, (2973), 19 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states 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 22:52:48,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 378.0) internal successors, (7560), 20 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states 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 22:52:48,284 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 378.0) internal successors, (7560), 20 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states 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 22:52:48,285 INFO L175 Difference]: Start difference. First operand has 158 places, 243 transitions, 3642 flow. Second operand 19 states and 2973 transitions. [2023-11-06 22:52:48,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 466 transitions, 7301 flow [2023-11-06 22:52:48,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 466 transitions, 7124 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-11-06 22:52:48,467 INFO L231 Difference]: Finished difference. Result has 178 places, 361 transitions, 6286 flow [2023-11-06 22:52:48,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=3510, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6286, PETRI_PLACES=178, PETRI_TRANSITIONS=361} [2023-11-06 22:52:48,471 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 157 predicate places. [2023-11-06 22:52:48,471 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 361 transitions, 6286 flow [2023-11-06 22:52:48,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 150.92307692307693) internal successors, (1962), 13 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states 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 22:52:48,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:48,472 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:48,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:48,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:48,678 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:48,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:48,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1895735772, now seen corresponding path program 5 times [2023-11-06 22:52:48,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:48,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133926458] [2023-11-06 22:52:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:48,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:48,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133926458] [2023-11-06 22:52:48,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133926458] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:48,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227537432] [2023-11-06 22:52:48,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:52:48,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:48,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:48,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:48,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:52:49,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:49,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:49,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:49,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:49,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:49,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227537432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:49,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:49,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 22:52:49,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463235486] [2023-11-06 22:52:49,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:49,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:52:49,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:49,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:52:49,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:52:49,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:52:49,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 361 transitions, 6286 flow. Second operand has 13 states, 13 states have (on average 150.92307692307693) internal successors, (1962), 13 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states 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 22:52:49,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:49,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:52:49,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:51,095 INFO L124 PetriNetUnfolderBase]: 1291/2499 cut-off events. [2023-11-06 22:52:51,095 INFO L125 PetriNetUnfolderBase]: For 28042/28042 co-relation queries the response was YES. [2023-11-06 22:52:51,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18556 conditions, 2499 events. 1291/2499 cut-off events. For 28042/28042 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 16212 event pairs, 35 based on Foata normal form. 4/2502 useless extension candidates. Maximal degree in co-relation 18259. Up to 645 conditions per place. [2023-11-06 22:52:51,140 INFO L140 encePairwiseOnDemand]: 372/378 looper letters, 282 selfloop transitions, 224 changer transitions 0/506 dead transitions. [2023-11-06 22:52:51,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 506 transitions, 9153 flow [2023-11-06 22:52:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:52:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:52:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2811 transitions. [2023-11-06 22:52:51,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131393298059965 [2023-11-06 22:52:51,148 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2811 transitions. [2023-11-06 22:52:51,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2811 transitions. [2023-11-06 22:52:51,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:51,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2811 transitions. [2023-11-06 22:52:51,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 156.16666666666666) internal successors, (2811), 18 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states 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 22:52:51,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:52:51,166 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:52:51,166 INFO L175 Difference]: Start difference. First operand has 178 places, 361 transitions, 6286 flow. Second operand 18 states and 2811 transitions. [2023-11-06 22:52:51,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 506 transitions, 9153 flow [2023-11-06 22:52:51,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 506 transitions, 8693 flow, removed 184 selfloop flow, removed 4 redundant places. [2023-11-06 22:52:51,521 INFO L231 Difference]: Finished difference. Result has 196 places, 381 transitions, 6821 flow [2023-11-06 22:52:51,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=5884, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6821, PETRI_PLACES=196, PETRI_TRANSITIONS=381} [2023-11-06 22:52:51,522 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2023-11-06 22:52:51,522 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 381 transitions, 6821 flow [2023-11-06 22:52:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 150.92307692307693) internal successors, (1962), 13 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states 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 22:52:51,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:51,522 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:51,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:51,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:52:51,723 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:51,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:51,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1410538596, now seen corresponding path program 6 times [2023-11-06 22:52:51,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:51,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148535356] [2023-11-06 22:52:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:51,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:51,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:51,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148535356] [2023-11-06 22:52:51,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148535356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:51,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165813637] [2023-11-06 22:52:51,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:52:51,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:51,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:51,976 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:51,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:52:52,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:52:52,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:52,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:52,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:52,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:52,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165813637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:52,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:52,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-06 22:52:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123992890] [2023-11-06 22:52:52,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:52,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 22:52:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 22:52:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:52:52,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:52:52,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 381 transitions, 6821 flow. Second operand has 11 states, 11 states have (on average 151.27272727272728) internal successors, (1664), 11 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 22:52:52,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:52,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:52:52,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:54,033 INFO L124 PetriNetUnfolderBase]: 1286/2513 cut-off events. [2023-11-06 22:52:54,033 INFO L125 PetriNetUnfolderBase]: For 29992/29992 co-relation queries the response was YES. [2023-11-06 22:52:54,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18827 conditions, 2513 events. 1286/2513 cut-off events. For 29992/29992 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16512 event pairs, 147 based on Foata normal form. 28/2540 useless extension candidates. Maximal degree in co-relation 18694. Up to 951 conditions per place. [2023-11-06 22:52:54,073 INFO L140 encePairwiseOnDemand]: 372/378 looper letters, 247 selfloop transitions, 196 changer transitions 2/445 dead transitions. [2023-11-06 22:52:54,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 445 transitions, 8175 flow [2023-11-06 22:52:54,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 22:52:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-06 22:52:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2481 transitions. [2023-11-06 22:52:54,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41021825396825395 [2023-11-06 22:52:54,079 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2481 transitions. [2023-11-06 22:52:54,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2481 transitions. [2023-11-06 22:52:54,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:54,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2481 transitions. [2023-11-06 22:52:54,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 155.0625) internal successors, (2481), 16 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states 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 22:52:54,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 378.0) internal successors, (6426), 17 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states 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 22:52:54,094 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 378.0) internal successors, (6426), 17 states have internal predecessors, (6426), 0 states have call successors, (0), 0 states 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 22:52:54,094 INFO L175 Difference]: Start difference. First operand has 196 places, 381 transitions, 6821 flow. Second operand 16 states and 2481 transitions. [2023-11-06 22:52:54,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 445 transitions, 8175 flow [2023-11-06 22:52:54,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 445 transitions, 7979 flow, removed 57 selfloop flow, removed 4 redundant places. [2023-11-06 22:52:54,412 INFO L231 Difference]: Finished difference. Result has 211 places, 389 transitions, 7192 flow [2023-11-06 22:52:54,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=6575, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=7192, PETRI_PLACES=211, PETRI_TRANSITIONS=389} [2023-11-06 22:52:54,414 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 190 predicate places. [2023-11-06 22:52:54,414 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 389 transitions, 7192 flow [2023-11-06 22:52:54,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 151.27272727272728) internal successors, (1664), 11 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states 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 22:52:54,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:54,415 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:54,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:54,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:52:54,621 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:54,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:54,621 INFO L85 PathProgramCache]: Analyzing trace with hash -275313114, now seen corresponding path program 7 times [2023-11-06 22:52:54,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:54,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838345116] [2023-11-06 22:52:54,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:54,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:54,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:54,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838345116] [2023-11-06 22:52:54,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838345116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:54,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710538482] [2023-11-06 22:52:54,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:52:54,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:54,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:54,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:52:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:55,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:55,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:55,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:55,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710538482] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:55,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:55,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-06 22:52:55,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109498057] [2023-11-06 22:52:55,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:55,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 22:52:55,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:55,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 22:52:55,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:52:55,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:52:55,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 389 transitions, 7192 flow. Second operand has 13 states, 13 states have (on average 151.23076923076923) internal successors, (1966), 13 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states 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 22:52:55,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:55,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:52:55,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:57,077 INFO L124 PetriNetUnfolderBase]: 1304/2547 cut-off events. [2023-11-06 22:52:57,078 INFO L125 PetriNetUnfolderBase]: For 34716/34716 co-relation queries the response was YES. [2023-11-06 22:52:57,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19832 conditions, 2547 events. 1304/2547 cut-off events. For 34716/34716 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16770 event pairs, 77 based on Foata normal form. 12/2558 useless extension candidates. Maximal degree in co-relation 19694. Up to 845 conditions per place. [2023-11-06 22:52:57,114 INFO L140 encePairwiseOnDemand]: 371/378 looper letters, 213 selfloop transitions, 256 changer transitions 0/469 dead transitions. [2023-11-06 22:52:57,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 469 transitions, 8901 flow [2023-11-06 22:52:57,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:52:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:52:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2792 transitions. [2023-11-06 22:52:57,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41034685479129923 [2023-11-06 22:52:57,121 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2792 transitions. [2023-11-06 22:52:57,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2792 transitions. [2023-11-06 22:52:57,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:57,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2792 transitions. [2023-11-06 22:52:57,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.11111111111111) internal successors, (2792), 18 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states 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 22:52:57,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:52:57,136 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:52:57,136 INFO L175 Difference]: Start difference. First operand has 211 places, 389 transitions, 7192 flow. Second operand 18 states and 2792 transitions. [2023-11-06 22:52:57,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 469 transitions, 8901 flow [2023-11-06 22:52:57,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 469 transitions, 8677 flow, removed 57 selfloop flow, removed 5 redundant places. [2023-11-06 22:52:57,484 INFO L231 Difference]: Finished difference. Result has 228 places, 396 transitions, 7789 flow [2023-11-06 22:52:57,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=6907, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7789, PETRI_PLACES=228, PETRI_TRANSITIONS=396} [2023-11-06 22:52:57,486 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-11-06 22:52:57,486 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 396 transitions, 7789 flow [2023-11-06 22:52:57,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 151.23076923076923) internal successors, (1966), 13 states have internal predecessors, (1966), 0 states have call successors, (0), 0 states 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 22:52:57,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:52:57,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:52:57,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:57,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:52:57,698 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:52:57,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:57,699 INFO L85 PathProgramCache]: Analyzing trace with hash -516376582, now seen corresponding path program 8 times [2023-11-06 22:52:57,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:57,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009178537] [2023-11-06 22:52:57,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:57,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:57,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:57,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009178537] [2023-11-06 22:52:57,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009178537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:52:57,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316215034] [2023-11-06 22:52:57,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:52:57,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:57,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:57,948 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:57,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:52:58,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:52:58,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:52:58,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:52:58,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:58,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:52:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:52:58,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316215034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:52:58,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:52:58,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:52:58,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016159389] [2023-11-06 22:52:58,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:52:58,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:52:58,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:58,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:52:58,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:52:58,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:52:58,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 396 transitions, 7789 flow. Second operand has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 22:52:58,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:52:58,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:52:58,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:52:59,906 INFO L124 PetriNetUnfolderBase]: 1391/2672 cut-off events. [2023-11-06 22:52:59,907 INFO L125 PetriNetUnfolderBase]: For 41515/41515 co-relation queries the response was YES. [2023-11-06 22:52:59,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21942 conditions, 2672 events. 1391/2672 cut-off events. For 41515/41515 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17443 event pairs, 289 based on Foata normal form. 22/2693 useless extension candidates. Maximal degree in co-relation 21796. Up to 1785 conditions per place. [2023-11-06 22:52:59,941 INFO L140 encePairwiseOnDemand]: 372/378 looper letters, 300 selfloop transitions, 186 changer transitions 2/488 dead transitions. [2023-11-06 22:52:59,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 488 transitions, 9984 flow [2023-11-06 22:52:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:52:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-06 22:52:59,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2186 transitions. [2023-11-06 22:52:59,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41307634164777024 [2023-11-06 22:52:59,946 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2186 transitions. [2023-11-06 22:52:59,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2186 transitions. [2023-11-06 22:52:59,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:52:59,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2186 transitions. [2023-11-06 22:52:59,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 156.14285714285714) internal successors, (2186), 14 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states 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 22:52:59,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 378.0) internal successors, (5670), 15 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states 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 22:52:59,958 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 378.0) internal successors, (5670), 15 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states 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 22:52:59,958 INFO L175 Difference]: Start difference. First operand has 228 places, 396 transitions, 7789 flow. Second operand 14 states and 2186 transitions. [2023-11-06 22:52:59,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 488 transitions, 9984 flow [2023-11-06 22:53:00,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 488 transitions, 9581 flow, removed 29 selfloop flow, removed 10 redundant places. [2023-11-06 22:53:00,373 INFO L231 Difference]: Finished difference. Result has 236 places, 430 transitions, 8778 flow [2023-11-06 22:53:00,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=7423, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8778, PETRI_PLACES=236, PETRI_TRANSITIONS=430} [2023-11-06 22:53:00,374 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2023-11-06 22:53:00,374 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 430 transitions, 8778 flow [2023-11-06 22:53:00,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.0) internal successors, (1812), 12 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states 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 22:53:00,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:00,375 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:00,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:00,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:53:00,575 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:53:00,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1575430944, now seen corresponding path program 9 times [2023-11-06 22:53:00,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:00,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168391695] [2023-11-06 22:53:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:53:00,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:00,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168391695] [2023-11-06 22:53:00,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168391695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:00,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065350617] [2023-11-06 22:53:00,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:53:00,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:00,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:00,900 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:00,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:53:01,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 22:53:01,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:01,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:53:01,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:53:01,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:53:01,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065350617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:01,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:01,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 22:53:01,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052600924] [2023-11-06 22:53:01,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:01,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:53:01,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:01,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:53:01,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:53:01,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:53:01,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 430 transitions, 8778 flow. Second operand has 12 states, 12 states have (on average 151.33333333333334) internal successors, (1816), 12 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 22:53:01,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:01,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:53:01,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:02,920 INFO L124 PetriNetUnfolderBase]: 1374/2645 cut-off events. [2023-11-06 22:53:02,920 INFO L125 PetriNetUnfolderBase]: For 44809/44809 co-relation queries the response was YES. [2023-11-06 22:53:02,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22255 conditions, 2645 events. 1374/2645 cut-off events. For 44809/44809 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 17285 event pairs, 293 based on Foata normal form. 20/2664 useless extension candidates. Maximal degree in co-relation 22105. Up to 1801 conditions per place. [2023-11-06 22:53:02,952 INFO L140 encePairwiseOnDemand]: 372/378 looper letters, 297 selfloop transitions, 181 changer transitions 2/480 dead transitions. [2023-11-06 22:53:02,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 480 transitions, 10002 flow [2023-11-06 22:53:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 22:53:02,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-06 22:53:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2331 transitions. [2023-11-06 22:53:02,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2023-11-06 22:53:02,958 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2331 transitions. [2023-11-06 22:53:02,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2331 transitions. [2023-11-06 22:53:02,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:02,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2331 transitions. [2023-11-06 22:53:02,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 155.4) internal successors, (2331), 15 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states 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 22:53:02,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 378.0) internal successors, (6048), 16 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 22:53:02,971 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 378.0) internal successors, (6048), 16 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 22:53:02,971 INFO L175 Difference]: Start difference. First operand has 236 places, 430 transitions, 8778 flow. Second operand 15 states and 2331 transitions. [2023-11-06 22:53:02,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 480 transitions, 10002 flow [2023-11-06 22:53:03,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 480 transitions, 9932 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-11-06 22:53:03,378 INFO L231 Difference]: Finished difference. Result has 248 places, 431 transitions, 9096 flow [2023-11-06 22:53:03,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=8581, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9096, PETRI_PLACES=248, PETRI_TRANSITIONS=431} [2023-11-06 22:53:03,380 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2023-11-06 22:53:03,380 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 431 transitions, 9096 flow [2023-11-06 22:53:03,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 151.33333333333334) internal successors, (1816), 12 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states 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 22:53:03,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:03,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:03,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:03,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:53:03,586 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:53:03,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:03,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1923907738, now seen corresponding path program 5 times [2023-11-06 22:53:03,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:03,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092693280] [2023-11-06 22:53:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:03,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:53:03,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:03,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092693280] [2023-11-06 22:53:03,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092693280] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:03,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876931469] [2023-11-06 22:53:03,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:53:03,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:03,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:03,912 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:03,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:53:04,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:53:04,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:04,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:53:04,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:04,090 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 22:53:04,144 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 22:53:04,183 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 22:53:04,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:53:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:04,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:05,650 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:53:05,650 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 55 treesize of output 44 [2023-11-06 22:53:05,663 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:53:05,663 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 94 treesize of output 81 [2023-11-06 22:53:05,673 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:53:05,673 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 78 treesize of output 54 [2023-11-06 22:53:05,686 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:53:05,686 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 32 treesize of output 20 [2023-11-06 22:53:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:53:05,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876931469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:05,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:05,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 24 [2023-11-06 22:53:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894142616] [2023-11-06 22:53:05,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:53:05,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:53:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=442, Unknown=3, NotChecked=0, Total=552 [2023-11-06 22:53:08,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:10,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:12,961 WARN L539 Checker$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 22:53:15,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:17,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:19,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:21,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:21,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 378 [2023-11-06 22:53:21,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 431 transitions, 9096 flow. Second operand has 24 states, 24 states have (on average 97.04166666666667) internal successors, (2329), 24 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states 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 22:53:21,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:21,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 378 [2023-11-06 22:53:21,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:27,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:30,266 WARN L539 Checker$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 22:53:32,796 INFO L124 PetriNetUnfolderBase]: 2140/4196 cut-off events. [2023-11-06 22:53:32,796 INFO L125 PetriNetUnfolderBase]: For 75094/75094 co-relation queries the response was YES. [2023-11-06 22:53:32,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35630 conditions, 4196 events. 2140/4196 cut-off events. For 75094/75094 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30778 event pairs, 216 based on Foata normal form. 28/4223 useless extension candidates. Maximal degree in co-relation 35478. Up to 1703 conditions per place. [2023-11-06 22:53:32,847 INFO L140 encePairwiseOnDemand]: 366/378 looper letters, 502 selfloop transitions, 226 changer transitions 49/777 dead transitions. [2023-11-06 22:53:32,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 777 transitions, 15795 flow [2023-11-06 22:53:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:53:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 22:53:32,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3549 transitions. [2023-11-06 22:53:32,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26825396825396824 [2023-11-06 22:53:32,856 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3549 transitions. [2023-11-06 22:53:32,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3549 transitions. [2023-11-06 22:53:32,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:32,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3549 transitions. [2023-11-06 22:53:32,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 101.4) internal successors, (3549), 35 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states 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 22:53:32,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 378.0) internal successors, (13608), 36 states have internal predecessors, (13608), 0 states have call successors, (0), 0 states 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 22:53:32,879 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 378.0) internal successors, (13608), 36 states have internal predecessors, (13608), 0 states have call successors, (0), 0 states 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 22:53:32,879 INFO L175 Difference]: Start difference. First operand has 248 places, 431 transitions, 9096 flow. Second operand 35 states and 3549 transitions. [2023-11-06 22:53:32,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 777 transitions, 15795 flow [2023-11-06 22:53:33,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 777 transitions, 15435 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-11-06 22:53:33,728 INFO L231 Difference]: Finished difference. Result has 285 places, 547 transitions, 12264 flow [2023-11-06 22:53:33,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=8854, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12264, PETRI_PLACES=285, PETRI_TRANSITIONS=547} [2023-11-06 22:53:33,729 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 264 predicate places. [2023-11-06 22:53:33,729 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 547 transitions, 12264 flow [2023-11-06 22:53:33,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.04166666666667) internal successors, (2329), 24 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states 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 22:53:33,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:33,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:33,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:33,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:53:33,931 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:53:33,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:33,931 INFO L85 PathProgramCache]: Analyzing trace with hash -927299234, now seen corresponding path program 6 times [2023-11-06 22:53:33,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:33,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461682121] [2023-11-06 22:53:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:33,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:53:34,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:34,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461682121] [2023-11-06 22:53:34,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461682121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:34,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366141572] [2023-11-06 22:53:34,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:53:34,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:34,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:34,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:34,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:53:34,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-06 22:53:34,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:53:34,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:53:34,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:34,395 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 22:53:34,460 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 22:53:34,501 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 22:53:34,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 22:53:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:53:34,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:35,325 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:53:35,325 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 55 treesize of output 44 [2023-11-06 22:53:35,341 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 22:53:35,342 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 94 treesize of output 81 [2023-11-06 22:53:35,355 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:53:35,355 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 78 treesize of output 54 [2023-11-06 22:53:35,367 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 22:53:35,367 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 32 treesize of output 20 [2023-11-06 22:53:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:53:35,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366141572] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:35,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:35,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-11-06 22:53:35,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019723492] [2023-11-06 22:53:35,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:35,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-06 22:53:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-06 22:53:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=274, Unknown=2, NotChecked=0, Total=342 [2023-11-06 22:53:37,995 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 22:53:38,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 378 [2023-11-06 22:53:38,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 547 transitions, 12264 flow. Second operand has 19 states, 19 states have (on average 97.42105263157895) internal successors, (1851), 19 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states 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 22:53:38,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:53:38,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 378 [2023-11-06 22:53:38,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:53:41,592 INFO L124 PetriNetUnfolderBase]: 2123/4167 cut-off events. [2023-11-06 22:53:41,592 INFO L125 PetriNetUnfolderBase]: For 82928/82928 co-relation queries the response was YES. [2023-11-06 22:53:41,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36961 conditions, 4167 events. 2123/4167 cut-off events. For 82928/82928 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 30580 event pairs, 168 based on Foata normal form. 30/4196 useless extension candidates. Maximal degree in co-relation 36796. Up to 1561 conditions per place. [2023-11-06 22:53:41,652 INFO L140 encePairwiseOnDemand]: 368/378 looper letters, 438 selfloop transitions, 130 changer transitions 145/713 dead transitions. [2023-11-06 22:53:41,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 713 transitions, 16264 flow [2023-11-06 22:53:41,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 22:53:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-06 22:53:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2800 transitions. [2023-11-06 22:53:41,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26455026455026454 [2023-11-06 22:53:41,661 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2800 transitions. [2023-11-06 22:53:41,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2800 transitions. [2023-11-06 22:53:41,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:53:41,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2800 transitions. [2023-11-06 22:53:41,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 100.0) internal successors, (2800), 28 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states 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 22:53:41,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 378.0) internal successors, (10962), 29 states have internal predecessors, (10962), 0 states have call successors, (0), 0 states 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 22:53:41,679 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 378.0) internal successors, (10962), 29 states have internal predecessors, (10962), 0 states have call successors, (0), 0 states 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 22:53:41,679 INFO L175 Difference]: Start difference. First operand has 285 places, 547 transitions, 12264 flow. Second operand 28 states and 2800 transitions. [2023-11-06 22:53:41,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 713 transitions, 16264 flow [2023-11-06 22:53:42,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 713 transitions, 15802 flow, removed 37 selfloop flow, removed 14 redundant places. [2023-11-06 22:53:42,416 INFO L231 Difference]: Finished difference. Result has 299 places, 465 transitions, 10052 flow [2023-11-06 22:53:42,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=11783, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=10052, PETRI_PLACES=299, PETRI_TRANSITIONS=465} [2023-11-06 22:53:42,418 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 278 predicate places. [2023-11-06 22:53:42,418 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 465 transitions, 10052 flow [2023-11-06 22:53:42,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 97.42105263157895) internal successors, (1851), 19 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states 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 22:53:42,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:53:42,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:53:42,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:42,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:42,625 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:53:42,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:42,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2121610534, now seen corresponding path program 1 times [2023-11-06 22:53:42,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:42,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965159309] [2023-11-06 22:53:42,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:42,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:53:42,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:42,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965159309] [2023-11-06 22:53:42,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965159309] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:53:42,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900756388] [2023-11-06 22:53:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:42,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:42,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:42,814 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:42,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:53:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:42,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 22:53:42,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:43,025 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 22:53:43,171 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 22:53:43,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:53:43,296 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 16 treesize of output 11 [2023-11-06 22:53:43,535 INFO L322 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-11-06 22:53:43,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 95 [2023-11-06 22:53:43,585 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 22:53:43,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:44,607 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:53:44,608 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 139 treesize of output 91 [2023-11-06 22:53:44,668 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:53:44,669 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 824 treesize of output 704 [2023-11-06 22:53:44,728 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:53:44,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 152 [2023-11-06 22:53:44,759 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:53:44,760 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 85 [2023-11-06 22:53:45,929 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-06 22:53:45,929 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 277 treesize of output 1 [2023-11-06 22:53:45,991 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 22:53:45,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900756388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:45,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:53:45,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-11-06 22:53:45,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810399973] [2023-11-06 22:53:45,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:45,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:53:45,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:45,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:53:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=303, Unknown=11, NotChecked=0, Total=380 [2023-11-06 22:53:48,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:50,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:53,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:55,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:53:57,856 WARN L539 Checker$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 22:53:59,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:54:02,155 WARN L539 Checker$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 22:54:04,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:54:04,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 378 [2023-11-06 22:54:04,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 465 transitions, 10052 flow. Second operand has 20 states, 20 states have (on average 97.55) internal successors, (1951), 20 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states 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 22:54:04,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:04,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 378 [2023-11-06 22:54:04,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:07,041 INFO L124 PetriNetUnfolderBase]: 1429/2915 cut-off events. [2023-11-06 22:54:07,041 INFO L125 PetriNetUnfolderBase]: For 66377/66377 co-relation queries the response was YES. [2023-11-06 22:54:07,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25435 conditions, 2915 events. 1429/2915 cut-off events. For 66377/66377 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 20589 event pairs, 173 based on Foata normal form. 158/3072 useless extension candidates. Maximal degree in co-relation 25281. Up to 1322 conditions per place. [2023-11-06 22:54:07,075 INFO L140 encePairwiseOnDemand]: 369/378 looper letters, 280 selfloop transitions, 99 changer transitions 138/517 dead transitions. [2023-11-06 22:54:07,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 517 transitions, 11226 flow [2023-11-06 22:54:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:54:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:54:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1827 transitions. [2023-11-06 22:54:07,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26851851851851855 [2023-11-06 22:54:07,080 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1827 transitions. [2023-11-06 22:54:07,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1827 transitions. [2023-11-06 22:54:07,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:07,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1827 transitions. [2023-11-06 22:54:07,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 101.5) internal successors, (1827), 18 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states 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 22:54:07,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:54:07,093 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:54:07,094 INFO L175 Difference]: Start difference. First operand has 299 places, 465 transitions, 10052 flow. Second operand 18 states and 1827 transitions. [2023-11-06 22:54:07,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 517 transitions, 11226 flow [2023-11-06 22:54:07,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 517 transitions, 10879 flow, removed 118 selfloop flow, removed 22 redundant places. [2023-11-06 22:54:07,503 INFO L231 Difference]: Finished difference. Result has 272 places, 356 transitions, 7532 flow [2023-11-06 22:54:07,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7532, PETRI_PLACES=272, PETRI_TRANSITIONS=356} [2023-11-06 22:54:07,504 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 251 predicate places. [2023-11-06 22:54:07,504 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 356 transitions, 7532 flow [2023-11-06 22:54:07,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.55) internal successors, (1951), 20 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states 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 22:54:07,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:07,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:07,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:07,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:07,711 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:54:07,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 32404511, now seen corresponding path program 10 times [2023-11-06 22:54:07,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:07,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275715098] [2023-11-06 22:54:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:54:08,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275715098] [2023-11-06 22:54:08,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275715098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:08,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677981997] [2023-11-06 22:54:08,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:54:08,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:08,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:08,104 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:08,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:54:08,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:54:08,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:08,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:54:08,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:54:08,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:54:08,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677981997] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:08,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:08,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 22:54:08,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597181986] [2023-11-06 22:54:08,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:08,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:54:08,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:08,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:54:08,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:54:08,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:54:08,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 356 transitions, 7532 flow. Second operand has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states 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 22:54:08,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:08,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:54:08,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:10,524 INFO L124 PetriNetUnfolderBase]: 1127/2249 cut-off events. [2023-11-06 22:54:10,524 INFO L125 PetriNetUnfolderBase]: For 42005/42005 co-relation queries the response was YES. [2023-11-06 22:54:10,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19544 conditions, 2249 events. 1127/2249 cut-off events. For 42005/42005 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 14797 event pairs, 144 based on Foata normal form. 16/2264 useless extension candidates. Maximal degree in co-relation 19461. Up to 724 conditions per place. [2023-11-06 22:54:10,546 INFO L140 encePairwiseOnDemand]: 372/378 looper letters, 230 selfloop transitions, 196 changer transitions 1/427 dead transitions. [2023-11-06 22:54:10,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 427 transitions, 8929 flow [2023-11-06 22:54:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:54:10,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:54:10,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2783 transitions. [2023-11-06 22:54:10,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090241034685479 [2023-11-06 22:54:10,550 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2783 transitions. [2023-11-06 22:54:10,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2783 transitions. [2023-11-06 22:54:10,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:10,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2783 transitions. [2023-11-06 22:54:10,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 154.61111111111111) internal successors, (2783), 18 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states 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 22:54:10,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:54:10,564 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:54:10,564 INFO L175 Difference]: Start difference. First operand has 272 places, 356 transitions, 7532 flow. Second operand 18 states and 2783 transitions. [2023-11-06 22:54:10,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 427 transitions, 8929 flow [2023-11-06 22:54:10,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 427 transitions, 8600 flow, removed 113 selfloop flow, removed 17 redundant places. [2023-11-06 22:54:10,798 INFO L231 Difference]: Finished difference. Result has 246 places, 370 transitions, 7890 flow [2023-11-06 22:54:10,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=7220, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7890, PETRI_PLACES=246, PETRI_TRANSITIONS=370} [2023-11-06 22:54:10,799 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-11-06 22:54:10,799 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 370 transitions, 7890 flow [2023-11-06 22:54:10,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states 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 22:54:10,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:10,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:10,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:11,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:11,000 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:54:11,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:11,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1646447371, now seen corresponding path program 7 times [2023-11-06 22:54:11,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:11,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400855837] [2023-11-06 22:54:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:11,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:54:11,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:11,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400855837] [2023-11-06 22:54:11,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400855837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:11,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313782484] [2023-11-06 22:54:11,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:54:11,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:11,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:11,361 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:11,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:54:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:11,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:54:11,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:54:11,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:54:11,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313782484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:11,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:11,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-06 22:54:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088809511] [2023-11-06 22:54:11,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:11,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-06 22:54:11,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:11,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-06 22:54:11,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:54:12,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 378 [2023-11-06 22:54:12,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 370 transitions, 7890 flow. Second operand has 15 states, 15 states have (on average 152.06666666666666) internal successors, (2281), 15 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states 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 22:54:12,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:12,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 378 [2023-11-06 22:54:12,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:14,046 INFO L124 PetriNetUnfolderBase]: 1208/2506 cut-off events. [2023-11-06 22:54:14,047 INFO L125 PetriNetUnfolderBase]: For 42195/42195 co-relation queries the response was YES. [2023-11-06 22:54:14,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20905 conditions, 2506 events. 1208/2506 cut-off events. For 42195/42195 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17488 event pairs, 227 based on Foata normal form. 24/2529 useless extension candidates. Maximal degree in co-relation 20826. Up to 1360 conditions per place. [2023-11-06 22:54:14,082 INFO L140 encePairwiseOnDemand]: 371/378 looper letters, 309 selfloop transitions, 149 changer transitions 0/458 dead transitions. [2023-11-06 22:54:14,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 458 transitions, 9776 flow [2023-11-06 22:54:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 22:54:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-06 22:54:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2814 transitions. [2023-11-06 22:54:14,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41358024691358025 [2023-11-06 22:54:14,087 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2814 transitions. [2023-11-06 22:54:14,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2814 transitions. [2023-11-06 22:54:14,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:14,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2814 transitions. [2023-11-06 22:54:14,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 156.33333333333334) internal successors, (2814), 18 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states 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 22:54:14,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:54:14,103 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 378.0) internal successors, (7182), 19 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states 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 22:54:14,103 INFO L175 Difference]: Start difference. First operand has 246 places, 370 transitions, 7890 flow. Second operand 18 states and 2814 transitions. [2023-11-06 22:54:14,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 458 transitions, 9776 flow [2023-11-06 22:54:14,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 458 transitions, 9523 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-11-06 22:54:14,409 INFO L231 Difference]: Finished difference. Result has 267 places, 403 transitions, 8923 flow [2023-11-06 22:54:14,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=7646, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8923, PETRI_PLACES=267, PETRI_TRANSITIONS=403} [2023-11-06 22:54:14,410 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 246 predicate places. [2023-11-06 22:54:14,410 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 403 transitions, 8923 flow [2023-11-06 22:54:14,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 152.06666666666666) internal successors, (2281), 15 states have internal predecessors, (2281), 0 states have call successors, (0), 0 states 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 22:54:14,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:14,410 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:14,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:14,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 22:54:14,611 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:54:14,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:14,611 INFO L85 PathProgramCache]: Analyzing trace with hash 514177674, now seen corresponding path program 2 times [2023-11-06 22:54:14,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:14,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393525521] [2023-11-06 22:54:14,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:14,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:16,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:16,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393525521] [2023-11-06 22:54:16,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393525521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:16,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008595199] [2023-11-06 22:54:16,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:54:16,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:16,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:16,120 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:16,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:54:16,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:54:16,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:16,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:54:16,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:16,965 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:54:16,966 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 22:54:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:54:16,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:17,834 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-06 22:54:17,835 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-06 22:54:17,956 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-11-06 22:54:17,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-11-06 22:54:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:54:18,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008595199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:18,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:18,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-11-06 22:54:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563760334] [2023-11-06 22:54:18,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:18,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:54:18,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:18,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:54:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:54:26,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 378 [2023-11-06 22:54:26,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 403 transitions, 8923 flow. Second operand has 28 states, 28 states have (on average 130.85714285714286) internal successors, (3664), 28 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states 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 22:54:26,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:26,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 378 [2023-11-06 22:54:26,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:31,536 INFO L124 PetriNetUnfolderBase]: 1452/2987 cut-off events. [2023-11-06 22:54:31,536 INFO L125 PetriNetUnfolderBase]: For 57543/57543 co-relation queries the response was YES. [2023-11-06 22:54:31,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26501 conditions, 2987 events. 1452/2987 cut-off events. For 57543/57543 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21478 event pairs, 174 based on Foata normal form. 8/2993 useless extension candidates. Maximal degree in co-relation 26413. Up to 2364 conditions per place. [2023-11-06 22:54:31,575 INFO L140 encePairwiseOnDemand]: 366/378 looper letters, 406 selfloop transitions, 172 changer transitions 19/597 dead transitions. [2023-11-06 22:54:31,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 597 transitions, 12780 flow [2023-11-06 22:54:31,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 22:54:31,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-06 22:54:31,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4708 transitions. [2023-11-06 22:54:31,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3558578987150416 [2023-11-06 22:54:31,583 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4708 transitions. [2023-11-06 22:54:31,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4708 transitions. [2023-11-06 22:54:31,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:31,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4708 transitions. [2023-11-06 22:54:31,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 134.5142857142857) internal successors, (4708), 35 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states 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 22:54:31,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 378.0) internal successors, (13608), 36 states have internal predecessors, (13608), 0 states have call successors, (0), 0 states 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 22:54:31,608 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 378.0) internal successors, (13608), 36 states have internal predecessors, (13608), 0 states have call successors, (0), 0 states 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 22:54:31,609 INFO L175 Difference]: Start difference. First operand has 267 places, 403 transitions, 8923 flow. Second operand 35 states and 4708 transitions. [2023-11-06 22:54:31,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 597 transitions, 12780 flow [2023-11-06 22:54:32,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 597 transitions, 12437 flow, removed 52 selfloop flow, removed 11 redundant places. [2023-11-06 22:54:32,113 INFO L231 Difference]: Finished difference. Result has 302 places, 489 transitions, 11142 flow [2023-11-06 22:54:32,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=8682, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=11142, PETRI_PLACES=302, PETRI_TRANSITIONS=489} [2023-11-06 22:54:32,115 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 281 predicate places. [2023-11-06 22:54:32,115 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 489 transitions, 11142 flow [2023-11-06 22:54:32,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 130.85714285714286) internal successors, (3664), 28 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states 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 22:54:32,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:32,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:32,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:32,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 22:54:32,323 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:54:32,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash 650101682, now seen corresponding path program 3 times [2023-11-06 22:54:32,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:32,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690791947] [2023-11-06 22:54:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:34,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690791947] [2023-11-06 22:54:34,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690791947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779682786] [2023-11-06 22:54:34,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:54:34,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:34,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:34,648 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:34,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:54:34,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 22:54:34,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:34,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:54:34,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:35,366 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:54:35,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 97 [2023-11-06 22:54:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:54:35,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:36,408 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-06 22:54:36,408 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-06 22:54:36,546 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-11-06 22:54:36,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-11-06 22:54:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:54:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779682786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:36,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:36,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-11-06 22:54:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245791996] [2023-11-06 22:54:36,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:36,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:54:36,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:54:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:54:42,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 378 [2023-11-06 22:54:42,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 489 transitions, 11142 flow. Second operand has 29 states, 29 states have (on average 124.65517241379311) internal successors, (3615), 29 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 22:54:42,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:42,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 378 [2023-11-06 22:54:42,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:46,074 INFO L124 PetriNetUnfolderBase]: 1470/3021 cut-off events. [2023-11-06 22:54:46,074 INFO L125 PetriNetUnfolderBase]: For 61009/61009 co-relation queries the response was YES. [2023-11-06 22:54:46,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27913 conditions, 3021 events. 1470/3021 cut-off events. For 61009/61009 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 21733 event pairs, 185 based on Foata normal form. 6/3026 useless extension candidates. Maximal degree in co-relation 27815. Up to 2470 conditions per place. [2023-11-06 22:54:46,107 INFO L140 encePairwiseOnDemand]: 367/378 looper letters, 425 selfloop transitions, 154 changer transitions 11/590 dead transitions. [2023-11-06 22:54:46,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 590 transitions, 13226 flow [2023-11-06 22:54:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-06 22:54:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-06 22:54:46,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3486 transitions. [2023-11-06 22:54:46,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34156378600823045 [2023-11-06 22:54:46,113 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3486 transitions. [2023-11-06 22:54:46,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3486 transitions. [2023-11-06 22:54:46,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:46,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3486 transitions. [2023-11-06 22:54:46,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 129.11111111111111) internal successors, (3486), 27 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states 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 22:54:46,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 378.0) internal successors, (10584), 28 states have internal predecessors, (10584), 0 states have call successors, (0), 0 states 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 22:54:46,127 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 378.0) internal successors, (10584), 28 states have internal predecessors, (10584), 0 states have call successors, (0), 0 states 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 22:54:46,128 INFO L175 Difference]: Start difference. First operand has 302 places, 489 transitions, 11142 flow. Second operand 27 states and 3486 transitions. [2023-11-06 22:54:46,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 590 transitions, 13226 flow [2023-11-06 22:54:46,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 590 transitions, 12859 flow, removed 137 selfloop flow, removed 11 redundant places. [2023-11-06 22:54:46,529 INFO L231 Difference]: Finished difference. Result has 323 places, 509 transitions, 11702 flow [2023-11-06 22:54:46,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=10833, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11702, PETRI_PLACES=323, PETRI_TRANSITIONS=509} [2023-11-06 22:54:46,530 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 302 predicate places. [2023-11-06 22:54:46,530 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 509 transitions, 11702 flow [2023-11-06 22:54:46,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 124.65517241379311) internal successors, (3615), 29 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states 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 22:54:46,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:46,531 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:46,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:46,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-06 22:54:46,731 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:54:46,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1553058088, now seen corresponding path program 4 times [2023-11-06 22:54:46,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:46,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591686544] [2023-11-06 22:54:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:46,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:47,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:47,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591686544] [2023-11-06 22:54:47,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591686544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:47,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771336241] [2023-11-06 22:54:47,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:54:47,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:47,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:47,878 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:47,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 22:54:48,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:54:48,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:48,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:54:48,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:48,511 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:54:48,511 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 22:54:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:54:48,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:49,260 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-06 22:54:49,260 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-06 22:54:49,376 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-11-06 22:54:49,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-11-06 22:54:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:54:49,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771336241] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:49,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:54:49,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-11-06 22:54:49,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89292130] [2023-11-06 22:54:49,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:49,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:54:49,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:54:49,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:54:53,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 378 [2023-11-06 22:54:53,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 509 transitions, 11702 flow. Second operand has 28 states, 28 states have (on average 130.85714285714286) internal successors, (3664), 28 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states 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 22:54:53,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:54:53,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 378 [2023-11-06 22:54:53,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:54:57,928 INFO L124 PetriNetUnfolderBase]: 1499/3072 cut-off events. [2023-11-06 22:54:57,928 INFO L125 PetriNetUnfolderBase]: For 65387/65387 co-relation queries the response was YES. [2023-11-06 22:54:57,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28649 conditions, 3072 events. 1499/3072 cut-off events. For 65387/65387 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22119 event pairs, 197 based on Foata normal form. 4/3076 useless extension candidates. Maximal degree in co-relation 28548. Up to 2543 conditions per place. [2023-11-06 22:54:57,963 INFO L140 encePairwiseOnDemand]: 366/378 looper letters, 437 selfloop transitions, 159 changer transitions 17/613 dead transitions. [2023-11-06 22:54:57,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 613 transitions, 13662 flow [2023-11-06 22:54:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:54:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-06 22:54:57,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4186 transitions. [2023-11-06 22:54:57,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35722819593787336 [2023-11-06 22:54:57,971 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4186 transitions. [2023-11-06 22:54:57,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4186 transitions. [2023-11-06 22:54:57,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:54:57,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4186 transitions. [2023-11-06 22:54:57,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 135.03225806451613) internal successors, (4186), 31 states have internal predecessors, (4186), 0 states have call successors, (0), 0 states 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 22:54:57,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 378.0) internal successors, (12096), 32 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states 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 22:54:57,991 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 378.0) internal successors, (12096), 32 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states 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 22:54:57,991 INFO L175 Difference]: Start difference. First operand has 323 places, 509 transitions, 11702 flow. Second operand 31 states and 4186 transitions. [2023-11-06 22:54:57,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 613 transitions, 13662 flow [2023-11-06 22:54:58,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 613 transitions, 13481 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-11-06 22:54:58,457 INFO L231 Difference]: Finished difference. Result has 347 places, 518 transitions, 12093 flow [2023-11-06 22:54:58,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=11525, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=12093, PETRI_PLACES=347, PETRI_TRANSITIONS=518} [2023-11-06 22:54:58,459 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 326 predicate places. [2023-11-06 22:54:58,459 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 518 transitions, 12093 flow [2023-11-06 22:54:58,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 130.85714285714286) internal successors, (3664), 28 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states 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 22:54:58,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:54:58,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:54:58,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:58,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:58,660 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:54:58,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash 2007248074, now seen corresponding path program 5 times [2023-11-06 22:54:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:58,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076258587] [2023-11-06 22:54:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:54:59,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:59,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076258587] [2023-11-06 22:54:59,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076258587] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:54:59,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157682488] [2023-11-06 22:54:59,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:54:59,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:59,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:59,756 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:59,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 22:54:59,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-06 22:54:59,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:54:59,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:54:59,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:00,481 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:55:00,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-11-06 22:55:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:55:00,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:01,574 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:55:01,574 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 135 treesize of output 160 [2023-11-06 22:55:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:55:02,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157682488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:02,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:02,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 27 [2023-11-06 22:55:02,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611541009] [2023-11-06 22:55:02,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:02,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-06 22:55:02,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:02,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-06 22:55:02,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2023-11-06 22:55:07,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 378 [2023-11-06 22:55:07,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 518 transitions, 12093 flow. Second operand has 29 states, 29 states have (on average 131.6551724137931) internal successors, (3818), 29 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states 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 22:55:07,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:07,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 378 [2023-11-06 22:55:07,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:10,245 INFO L124 PetriNetUnfolderBase]: 1513/3091 cut-off events. [2023-11-06 22:55:10,245 INFO L125 PetriNetUnfolderBase]: For 67745/67745 co-relation queries the response was YES. [2023-11-06 22:55:10,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29298 conditions, 3091 events. 1513/3091 cut-off events. For 67745/67745 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22190 event pairs, 230 based on Foata normal form. 2/3093 useless extension candidates. Maximal degree in co-relation 29193. Up to 2859 conditions per place. [2023-11-06 22:55:10,280 INFO L140 encePairwiseOnDemand]: 367/378 looper letters, 496 selfloop transitions, 72 changer transitions 11/579 dead transitions. [2023-11-06 22:55:10,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 579 transitions, 13774 flow [2023-11-06 22:55:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:55:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-06 22:55:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3499 transitions. [2023-11-06 22:55:10,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.356023606023606 [2023-11-06 22:55:10,286 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3499 transitions. [2023-11-06 22:55:10,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3499 transitions. [2023-11-06 22:55:10,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:10,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3499 transitions. [2023-11-06 22:55:10,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 134.57692307692307) internal successors, (3499), 26 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states 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 22:55:10,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 378.0) internal successors, (10206), 27 states have internal predecessors, (10206), 0 states have call successors, (0), 0 states 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 22:55:10,303 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 378.0) internal successors, (10206), 27 states have internal predecessors, (10206), 0 states have call successors, (0), 0 states 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 22:55:10,303 INFO L175 Difference]: Start difference. First operand has 347 places, 518 transitions, 12093 flow. Second operand 26 states and 3499 transitions. [2023-11-06 22:55:10,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 579 transitions, 13774 flow [2023-11-06 22:55:10,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 579 transitions, 13410 flow, removed 29 selfloop flow, removed 25 redundant places. [2023-11-06 22:55:10,786 INFO L231 Difference]: Finished difference. Result has 349 places, 531 transitions, 12204 flow [2023-11-06 22:55:10,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=11729, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12204, PETRI_PLACES=349, PETRI_TRANSITIONS=531} [2023-11-06 22:55:10,788 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 328 predicate places. [2023-11-06 22:55:10,788 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 531 transitions, 12204 flow [2023-11-06 22:55:10,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 131.6551724137931) internal successors, (3818), 29 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states 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 22:55:10,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:10,789 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:10,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:10,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 22:55:10,989 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:10,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:10,990 INFO L85 PathProgramCache]: Analyzing trace with hash 2007842720, now seen corresponding path program 6 times [2023-11-06 22:55:10,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:10,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354171813] [2023-11-06 22:55:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:10,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:12,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:12,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354171813] [2023-11-06 22:55:12,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354171813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:12,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29716863] [2023-11-06 22:55:12,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:55:12,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:12,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:12,439 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:12,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 22:55:12,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-06 22:55:12,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:12,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:55:12,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:13,037 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:55:13,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 97 [2023-11-06 22:55:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:55:13,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:13,959 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-06 22:55:13,959 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-06 22:55:14,088 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-11-06 22:55:14,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-11-06 22:55:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:55:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29716863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:14,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:14,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-11-06 22:55:14,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152119317] [2023-11-06 22:55:14,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:14,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-06 22:55:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-06 22:55:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2023-11-06 22:55:19,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 378 [2023-11-06 22:55:19,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 531 transitions, 12204 flow. Second operand has 28 states, 28 states have (on average 130.71428571428572) internal successors, (3660), 28 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states 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 22:55:19,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:19,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 378 [2023-11-06 22:55:19,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:23,393 INFO L124 PetriNetUnfolderBase]: 1646/3333 cut-off events. [2023-11-06 22:55:23,393 INFO L125 PetriNetUnfolderBase]: For 75737/75737 co-relation queries the response was YES. [2023-11-06 22:55:23,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31977 conditions, 3333 events. 1646/3333 cut-off events. For 75737/75737 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24067 event pairs, 229 based on Foata normal form. 7/3340 useless extension candidates. Maximal degree in co-relation 31870. Up to 2930 conditions per place. [2023-11-06 22:55:23,436 INFO L140 encePairwiseOnDemand]: 367/378 looper letters, 527 selfloop transitions, 126 changer transitions 15/668 dead transitions. [2023-11-06 22:55:23,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 668 transitions, 15552 flow [2023-11-06 22:55:23,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-06 22:55:23,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-06 22:55:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4429 transitions. [2023-11-06 22:55:23,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35505852172518837 [2023-11-06 22:55:23,443 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4429 transitions. [2023-11-06 22:55:23,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4429 transitions. [2023-11-06 22:55:23,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:23,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4429 transitions. [2023-11-06 22:55:23,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 134.21212121212122) internal successors, (4429), 33 states have internal predecessors, (4429), 0 states have call successors, (0), 0 states 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 22:55:23,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 378.0) internal successors, (12852), 34 states have internal predecessors, (12852), 0 states have call successors, (0), 0 states 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 22:55:23,464 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 378.0) internal successors, (12852), 34 states have internal predecessors, (12852), 0 states have call successors, (0), 0 states 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 22:55:23,464 INFO L175 Difference]: Start difference. First operand has 349 places, 531 transitions, 12204 flow. Second operand 33 states and 4429 transitions. [2023-11-06 22:55:23,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 668 transitions, 15552 flow [2023-11-06 22:55:24,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 668 transitions, 15073 flow, removed 58 selfloop flow, removed 19 redundant places. [2023-11-06 22:55:24,153 INFO L231 Difference]: Finished difference. Result has 371 places, 590 transitions, 13706 flow [2023-11-06 22:55:24,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=11832, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=13706, PETRI_PLACES=371, PETRI_TRANSITIONS=590} [2023-11-06 22:55:24,154 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 350 predicate places. [2023-11-06 22:55:24,154 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 590 transitions, 13706 flow [2023-11-06 22:55:24,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 130.71428571428572) internal successors, (3660), 28 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states 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 22:55:24,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:24,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:24,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:24,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-06 22:55:24,355 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:24,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:24,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1262890148, now seen corresponding path program 7 times [2023-11-06 22:55:24,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:24,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592434069] [2023-11-06 22:55:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:24,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:55:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:24,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592434069] [2023-11-06 22:55:24,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592434069] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:24,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343685130] [2023-11-06 22:55:24,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:55:24,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:24,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:24,628 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:24,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 22:55:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:24,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 22:55:24,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:55:24,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:55:25,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343685130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:25,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:25,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-06 22:55:25,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939988935] [2023-11-06 22:55:25,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:25,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:55:25,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:55:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:55:25,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 378 [2023-11-06 22:55:25,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 590 transitions, 13706 flow. Second operand has 14 states, 14 states have (on average 151.07142857142858) internal successors, (2115), 14 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 22:55:25,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:25,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 378 [2023-11-06 22:55:25,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:55:29,077 INFO L124 PetriNetUnfolderBase]: 2597/5359 cut-off events. [2023-11-06 22:55:29,077 INFO L125 PetriNetUnfolderBase]: For 147134/147134 co-relation queries the response was YES. [2023-11-06 22:55:29,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51323 conditions, 5359 events. 2597/5359 cut-off events. For 147134/147134 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 42855 event pairs, 246 based on Foata normal form. 100/5459 useless extension candidates. Maximal degree in co-relation 51207. Up to 1301 conditions per place. [2023-11-06 22:55:29,154 INFO L140 encePairwiseOnDemand]: 372/378 looper letters, 395 selfloop transitions, 491 changer transitions 1/887 dead transitions. [2023-11-06 22:55:29,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 887 transitions, 21196 flow [2023-11-06 22:55:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-06 22:55:29,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-06 22:55:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3288 transitions. [2023-11-06 22:55:29,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41421012849584277 [2023-11-06 22:55:29,159 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3288 transitions. [2023-11-06 22:55:29,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3288 transitions. [2023-11-06 22:55:29,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:55:29,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3288 transitions. [2023-11-06 22:55:29,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 156.57142857142858) internal successors, (3288), 21 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states 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 22:55:29,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 378.0) internal successors, (8316), 22 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states 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 22:55:29,173 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 378.0) internal successors, (8316), 22 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states 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 22:55:29,173 INFO L175 Difference]: Start difference. First operand has 371 places, 590 transitions, 13706 flow. Second operand 21 states and 3288 transitions. [2023-11-06 22:55:29,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 887 transitions, 21196 flow [2023-11-06 22:55:30,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 887 transitions, 20897 flow, removed 99 selfloop flow, removed 19 redundant places. [2023-11-06 22:55:30,454 INFO L231 Difference]: Finished difference. Result has 378 places, 772 transitions, 19655 flow [2023-11-06 22:55:30,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=378, PETRI_DIFFERENCE_MINUEND_FLOW=13170, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=19655, PETRI_PLACES=378, PETRI_TRANSITIONS=772} [2023-11-06 22:55:30,455 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 357 predicate places. [2023-11-06 22:55:30,455 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 772 transitions, 19655 flow [2023-11-06 22:55:30,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 151.07142857142858) internal successors, (2115), 14 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states 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 22:55:30,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:55:30,456 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:55:30,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-06 22:55:30,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 22:55:30,663 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-06 22:55:30,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:55:30,663 INFO L85 PathProgramCache]: Analyzing trace with hash -14668270, now seen corresponding path program 8 times [2023-11-06 22:55:30,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:55:30,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968677923] [2023-11-06 22:55:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:55:30,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:55:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:55:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:55:32,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:55:32,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968677923] [2023-11-06 22:55:32,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968677923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:55:32,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029587041] [2023-11-06 22:55:32,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:55:32,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:55:32,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:55:32,257 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:55:32,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d9986dd1-cdb9-4e2c-8d7a-b9beca4f76c1/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-06 22:55:32,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:55:32,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:55:32,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-06 22:55:32,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:55:32,825 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:55:32,825 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-11-06 22:55:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:55:32,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:55:33,515 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-11-06 22:55:33,515 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-11-06 22:55:33,622 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-11-06 22:55:33,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-11-06 22:55:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:55:33,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029587041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:55:33,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:55:33,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 25 [2023-11-06 22:55:33,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697451621] [2023-11-06 22:55:33,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:55:33,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:55:33,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:55:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:55:33,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:55:38,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 378 [2023-11-06 22:55:38,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 772 transitions, 19655 flow. Second operand has 27 states, 27 states have (on average 124.74074074074075) internal successors, (3368), 27 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states 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 22:55:38,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:55:38,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 378 [2023-11-06 22:55:38,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand