./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df63a9317cd159d15f0c87211084d5e90c66afa781f3187352107d14a3f61024 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:03:25,011 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:03:25,113 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:03:25,124 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:03:25,125 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:03:25,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:03:25,163 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:03:25,163 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:03:25,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:03:25,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:03:25,171 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:03:25,172 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:03:25,172 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:03:25,174 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:03:25,174 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:03:25,175 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:03:25,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:03:25,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:03:25,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:03:25,176 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:03:25,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:03:25,178 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:03:25,178 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:03:25,178 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:03:25,179 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:03:25,180 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:03:25,180 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:03:25,181 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:03:25,181 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:25,182 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:03:25,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:03:25,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:03:25,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:03:25,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:03:25,184 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:03:25,184 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:03:25,185 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:03:25,185 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:03:25,185 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:03:25,185 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_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df63a9317cd159d15f0c87211084d5e90c66afa781f3187352107d14a3f61024 [2023-11-19 08:03:25,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:03:25,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:03:25,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:03:25,506 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:03:25,507 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:03:25,508 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2023-11-19 08:03:28,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:03:29,019 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:03:29,020 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c [2023-11-19 08:03:29,035 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/data/61c6c5092/c23ebfa8ca7f445a9ebce540fd3c5694/FLAG8284e6809 [2023-11-19 08:03:29,059 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/data/61c6c5092/c23ebfa8ca7f445a9ebce540fd3c5694 [2023-11-19 08:03:29,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:03:29,070 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:03:29,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:29,080 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:03:29,086 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:03:29,090 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,091 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1739d4a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29, skipping insertion in model container [2023-11-19 08:03:29,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,124 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:03:29,323 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_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2904,2917] [2023-11-19 08:03:29,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:29,340 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:03:29,371 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_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/sv-benchmarks/c/weaver/bench-exp3x3-opt.wvr.c[2904,2917] [2023-11-19 08:03:29,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:03:29,390 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:03:29,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29 WrapperNode [2023-11-19 08:03:29,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:03:29,392 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:29,392 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:03:29,392 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:03:29,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,413 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,442 INFO L138 Inliner]: procedures = 25, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 131 [2023-11-19 08:03:29,443 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:03:29,444 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:03:29,444 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:03:29,444 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:03:29,455 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,455 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,459 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,460 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,478 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,479 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,483 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:03:29,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:03:29,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:03:29,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:03:29,486 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (1/1) ... [2023-11-19 08:03:29,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:03:29,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:29,552 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:03:29,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:03:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:03:29,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:03:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:03:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:03:29,623 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 08:03:29,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 08:03:29,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 08:03:29,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 08:03:29,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-19 08:03:29,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-19 08:03:29,625 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-19 08:03:29,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-19 08:03:29,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:03:29,627 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-11-19 08:03:29,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-11-19 08:03:29,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-11-19 08:03:29,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-11-19 08:03:29,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:03:29,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:03:29,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:03:29,631 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:03:29,808 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:03:29,811 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:03:30,134 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:03:30,146 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:03:30,146 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 08:03:30,166 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:30 BoogieIcfgContainer [2023-11-19 08:03:30,166 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:03:30,169 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:03:30,169 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:03:30,173 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:03:30,173 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:29" (1/3) ... [2023-11-19 08:03:30,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663c0cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:30, skipping insertion in model container [2023-11-19 08:03:30,174 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:29" (2/3) ... [2023-11-19 08:03:30,174 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663c0cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:30, skipping insertion in model container [2023-11-19 08:03:30,175 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:30" (3/3) ... [2023-11-19 08:03:30,176 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp3x3-opt.wvr.c [2023-11-19 08:03:30,186 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:03:30,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:03:30,195 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:03:30,195 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:03:30,311 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-19 08:03:30,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 178 transitions, 398 flow [2023-11-19 08:03:30,501 INFO L124 PetriNetUnfolderBase]: 14/172 cut-off events. [2023-11-19 08:03:30,501 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:03:30,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 172 events. 14/172 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 82 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2023-11-19 08:03:30,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 178 transitions, 398 flow [2023-11-19 08:03:30,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 155 transitions, 346 flow [2023-11-19 08:03:30,526 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:03:30,537 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 155 transitions, 346 flow [2023-11-19 08:03:30,540 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 155 transitions, 346 flow [2023-11-19 08:03:30,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 155 transitions, 346 flow [2023-11-19 08:03:30,621 INFO L124 PetriNetUnfolderBase]: 14/155 cut-off events. [2023-11-19 08:03:30,622 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:03:30,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180 conditions, 155 events. 14/155 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2023-11-19 08:03:30,630 INFO L119 LiptonReduction]: Number of co-enabled transitions 3612 [2023-11-19 08:03:36,448 INFO L134 LiptonReduction]: Checked pairs total: 4231 [2023-11-19 08:03:36,448 INFO L136 LiptonReduction]: Total number of compositions: 126 [2023-11-19 08:03:36,464 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:03:36,471 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6cdb151c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:03:36,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 08:03:36,483 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:03:36,483 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2023-11-19 08:03:36,483 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 08:03:36,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:36,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:36,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:03:36,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash -913393960, now seen corresponding path program 1 times [2023-11-19 08:03:36,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:36,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987579168] [2023-11-19 08:03:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:36,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:03:37,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:37,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987579168] [2023-11-19 08:03:37,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987579168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:37,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:37,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:37,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569515464] [2023-11-19 08:03:37,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:37,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:37,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:37,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 304 [2023-11-19 08:03:37,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:37,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:37,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 304 [2023-11-19 08:03:37,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:40,531 INFO L124 PetriNetUnfolderBase]: 24493/28515 cut-off events. [2023-11-19 08:03:40,531 INFO L125 PetriNetUnfolderBase]: For 1333/1333 co-relation queries the response was YES. [2023-11-19 08:03:40,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58163 conditions, 28515 events. 24493/28515 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 100535 event pairs, 4411 based on Foata normal form. 1/15700 useless extension candidates. Maximal degree in co-relation 44684. Up to 18741 conditions per place. [2023-11-19 08:03:40,807 INFO L140 encePairwiseOnDemand]: 300/304 looper letters, 59 selfloop transitions, 3 changer transitions 1/69 dead transitions. [2023-11-19 08:03:40,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 321 flow [2023-11-19 08:03:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-11-19 08:03:40,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5668859649122807 [2023-11-19 08:03:40,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-11-19 08:03:40,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-11-19 08:03:40,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:40,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-11-19 08:03:40,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:40,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:40,847 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:40,849 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 122 flow. Second operand 3 states and 517 transitions. [2023-11-19 08:03:40,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 321 flow [2023-11-19 08:03:40,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 69 transitions, 283 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-11-19 08:03:40,907 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 117 flow [2023-11-19 08:03:40,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-11-19 08:03:40,913 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -9 predicate places. [2023-11-19 08:03:40,913 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 117 flow [2023-11-19 08:03:40,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:40,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:40,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:40,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:03:40,915 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:03:40,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1822759954, now seen corresponding path program 1 times [2023-11-19 08:03:40,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:40,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929929183] [2023-11-19 08:03:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:40,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:40,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:03:41,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:41,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929929183] [2023-11-19 08:03:41,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929929183] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:41,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:41,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:41,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727747788] [2023-11-19 08:03:41,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:41,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:41,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:41,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:41,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:41,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 304 [2023-11-19 08:03:41,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:41,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:41,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 304 [2023-11-19 08:03:41,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:44,877 INFO L124 PetriNetUnfolderBase]: 31065/36311 cut-off events. [2023-11-19 08:03:44,877 INFO L125 PetriNetUnfolderBase]: For 5008/5008 co-relation queries the response was YES. [2023-11-19 08:03:44,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79506 conditions, 36311 events. 31065/36311 cut-off events. For 5008/5008 co-relation queries the response was YES. Maximal size of possible extension queue 1204. Compared 135651 event pairs, 4902 based on Foata normal form. 1/24903 useless extension candidates. Maximal degree in co-relation 25204. Up to 26312 conditions per place. [2023-11-19 08:03:45,112 INFO L140 encePairwiseOnDemand]: 300/304 looper letters, 63 selfloop transitions, 3 changer transitions 5/77 dead transitions. [2023-11-19 08:03:45,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 77 transitions, 342 flow [2023-11-19 08:03:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-11-19 08:03:45,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5712719298245614 [2023-11-19 08:03:45,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-11-19 08:03:45,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-11-19 08:03:45,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:45,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-11-19 08:03:45,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:45,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:45,126 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:45,126 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 117 flow. Second operand 3 states and 521 transitions. [2023-11-19 08:03:45,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 77 transitions, 342 flow [2023-11-19 08:03:45,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 77 transitions, 337 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:45,130 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 133 flow [2023-11-19 08:03:45,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-11-19 08:03:45,132 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2023-11-19 08:03:45,132 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 133 flow [2023-11-19 08:03:45,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:45,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:45,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:45,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:03:45,134 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:03:45,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:45,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1229229423, now seen corresponding path program 1 times [2023-11-19 08:03:45,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:45,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646964367] [2023-11-19 08:03:45,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:45,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:03:45,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:45,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646964367] [2023-11-19 08:03:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646964367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:45,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:03:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126779087] [2023-11-19 08:03:45,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:45,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:03:45,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:03:45,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:03:45,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 304 [2023-11-19 08:03:45,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:45,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:45,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 304 [2023-11-19 08:03:45,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:49,474 INFO L124 PetriNetUnfolderBase]: 42537/50110 cut-off events. [2023-11-19 08:03:49,474 INFO L125 PetriNetUnfolderBase]: For 15230/15230 co-relation queries the response was YES. [2023-11-19 08:03:49,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118639 conditions, 50110 events. 42537/50110 cut-off events. For 15230/15230 co-relation queries the response was YES. Maximal size of possible extension queue 1656. Compared 202499 event pairs, 7513 based on Foata normal form. 1/43236 useless extension candidates. Maximal degree in co-relation 37986. Up to 34724 conditions per place. [2023-11-19 08:03:49,738 INFO L140 encePairwiseOnDemand]: 300/304 looper letters, 67 selfloop transitions, 3 changer transitions 9/85 dead transitions. [2023-11-19 08:03:49,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 85 transitions, 396 flow [2023-11-19 08:03:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:03:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:03:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2023-11-19 08:03:49,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756578947368421 [2023-11-19 08:03:49,744 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2023-11-19 08:03:49,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2023-11-19 08:03:49,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:49,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2023-11-19 08:03:49,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:49,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:49,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 304.0) internal successors, (1216), 4 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:49,753 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 133 flow. Second operand 3 states and 525 transitions. [2023-11-19 08:03:49,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 85 transitions, 396 flow [2023-11-19 08:03:49,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 85 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:49,760 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 149 flow [2023-11-19 08:03:49,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2023-11-19 08:03:49,761 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -5 predicate places. [2023-11-19 08:03:49,761 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 149 flow [2023-11-19 08:03:49,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:49,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:49,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:49,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:03:49,763 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:03:49,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash -835301838, now seen corresponding path program 1 times [2023-11-19 08:03:49,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:49,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30179828] [2023-11-19 08:03:49,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:49,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:03:49,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:49,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30179828] [2023-11-19 08:03:49,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30179828] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:03:49,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:03:49,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:03:49,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074101845] [2023-11-19 08:03:49,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:03:50,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:03:50,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:50,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:03:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:03:50,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 304 [2023-11-19 08:03:50,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:50,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:50,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 304 [2023-11-19 08:03:50,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:53,946 INFO L124 PetriNetUnfolderBase]: 42133/49597 cut-off events. [2023-11-19 08:03:53,946 INFO L125 PetriNetUnfolderBase]: For 19842/19842 co-relation queries the response was YES. [2023-11-19 08:03:54,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122744 conditions, 49597 events. 42133/49597 cut-off events. For 19842/19842 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 197618 event pairs, 1119 based on Foata normal form. 706/50247 useless extension candidates. Maximal degree in co-relation 39498. Up to 19267 conditions per place. [2023-11-19 08:03:54,194 INFO L140 encePairwiseOnDemand]: 299/304 looper letters, 108 selfloop transitions, 6 changer transitions 16/136 dead transitions. [2023-11-19 08:03:54,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 136 transitions, 657 flow [2023-11-19 08:03:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:03:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:03:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 840 transitions. [2023-11-19 08:03:54,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2023-11-19 08:03:54,198 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 840 transitions. [2023-11-19 08:03:54,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 840 transitions. [2023-11-19 08:03:54,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:54,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 840 transitions. [2023-11-19 08:03:54,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:54,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:54,208 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:54,208 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 149 flow. Second operand 5 states and 840 transitions. [2023-11-19 08:03:54,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 136 transitions, 657 flow [2023-11-19 08:03:54,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 136 transitions, 653 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:54,219 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 170 flow [2023-11-19 08:03:54,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2023-11-19 08:03:54,221 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2023-11-19 08:03:54,221 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 170 flow [2023-11-19 08:03:54,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:54,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:54,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:54,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:03:54,223 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:03:54,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash -980600290, now seen corresponding path program 1 times [2023-11-19 08:03:54,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:54,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764292334] [2023-11-19 08:03:54,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:54,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:03:54,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:54,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764292334] [2023-11-19 08:03:54,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764292334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:54,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926524648] [2023-11-19 08:03:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:54,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:54,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:03:54,612 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:03:54,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:03:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:03:54,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 08:03:54,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:03:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:03:54,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:03:55,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926524648] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:03:55,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:03:55,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-19 08:03:55,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230603904] [2023-11-19 08:03:55,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:55,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:03:55,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:55,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:03:55,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:03:55,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 304 [2023-11-19 08:03:55,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:55,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:03:55,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 304 [2023-11-19 08:03:55,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:03:59,461 INFO L124 PetriNetUnfolderBase]: 41757/49796 cut-off events. [2023-11-19 08:03:59,462 INFO L125 PetriNetUnfolderBase]: For 28176/28176 co-relation queries the response was YES. [2023-11-19 08:03:59,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132163 conditions, 49796 events. 41757/49796 cut-off events. For 28176/28176 co-relation queries the response was YES. Maximal size of possible extension queue 1651. Compared 210515 event pairs, 5662 based on Foata normal form. 1085/50656 useless extension candidates. Maximal degree in co-relation 43327. Up to 24256 conditions per place. [2023-11-19 08:03:59,717 INFO L140 encePairwiseOnDemand]: 298/304 looper letters, 121 selfloop transitions, 6 changer transitions 11/144 dead transitions. [2023-11-19 08:03:59,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 144 transitions, 759 flow [2023-11-19 08:03:59,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:03:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:03:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 842 transitions. [2023-11-19 08:03:59,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5539473684210526 [2023-11-19 08:03:59,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 842 transitions. [2023-11-19 08:03:59,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 842 transitions. [2023-11-19 08:03:59,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:03:59,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 842 transitions. [2023-11-19 08:03:59,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:59,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:59,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:59,732 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 170 flow. Second operand 5 states and 842 transitions. [2023-11-19 08:03:59,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 144 transitions, 759 flow [2023-11-19 08:03:59,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 144 transitions, 746 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:03:59,740 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 203 flow [2023-11-19 08:03:59,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=203, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2023-11-19 08:03:59,741 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-11-19 08:03:59,741 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 203 flow [2023-11-19 08:03:59,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:03:59,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:03:59,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:03:59,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:03:59,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc91e1d2-d1e4-4b09-8d24-45c3b79c1afe/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:03:59,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:03:59,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:03:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash 483326117, now seen corresponding path program 1 times [2023-11-19 08:03:59,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:03:59,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849087646] [2023-11-19 08:03:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:03:59,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:03:59,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:04:00,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:00,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849087646] [2023-11-19 08:04:00,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849087646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:00,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:00,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:00,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024834094] [2023-11-19 08:04:00,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:00,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:00,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:00,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:00,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 304 [2023-11-19 08:04:00,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 203 flow. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:00,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:00,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 304 [2023-11-19 08:04:00,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:05,358 INFO L124 PetriNetUnfolderBase]: 48415/58315 cut-off events. [2023-11-19 08:04:05,358 INFO L125 PetriNetUnfolderBase]: For 59957/59975 co-relation queries the response was YES. [2023-11-19 08:04:05,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173045 conditions, 58315 events. 48415/58315 cut-off events. For 59957/59975 co-relation queries the response was YES. Maximal size of possible extension queue 1943. Compared 261750 event pairs, 6345 based on Foata normal form. 1312/58970 useless extension candidates. Maximal degree in co-relation 75464. Up to 28590 conditions per place. [2023-11-19 08:04:05,590 INFO L140 encePairwiseOnDemand]: 298/304 looper letters, 122 selfloop transitions, 6 changer transitions 23/157 dead transitions. [2023-11-19 08:04:05,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 157 transitions, 876 flow [2023-11-19 08:04:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:04:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 850 transitions. [2023-11-19 08:04:05,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592105263157895 [2023-11-19 08:04:05,595 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 850 transitions. [2023-11-19 08:04:05,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 850 transitions. [2023-11-19 08:04:05,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:05,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 850 transitions. [2023-11-19 08:04:05,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:05,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:05,604 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:05,604 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 203 flow. Second operand 5 states and 850 transitions. [2023-11-19 08:04:05,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 157 transitions, 876 flow [2023-11-19 08:04:05,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 157 transitions, 859 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:05,643 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 227 flow [2023-11-19 08:04:05,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-11-19 08:04:05,645 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2023-11-19 08:04:05,645 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 227 flow [2023-11-19 08:04:05,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:05,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:05,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:05,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:04:05,646 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:04:05,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:05,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1734756253, now seen corresponding path program 1 times [2023-11-19 08:04:05,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:05,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755871470] [2023-11-19 08:04:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:05,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:04:06,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:06,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755871470] [2023-11-19 08:04:06,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755871470] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:06,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:06,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:06,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683695671] [2023-11-19 08:04:06,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:06,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:06,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:06,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:06,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:06,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 304 [2023-11-19 08:04:06,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:06,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:06,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 304 [2023-11-19 08:04:06,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:09,744 INFO L124 PetriNetUnfolderBase]: 31893/37915 cut-off events. [2023-11-19 08:04:09,746 INFO L125 PetriNetUnfolderBase]: For 50003/50003 co-relation queries the response was YES. [2023-11-19 08:04:09,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124382 conditions, 37915 events. 31893/37915 cut-off events. For 50003/50003 co-relation queries the response was YES. Maximal size of possible extension queue 1283. Compared 151946 event pairs, 749 based on Foata normal form. 426/38284 useless extension candidates. Maximal degree in co-relation 59933. Up to 14817 conditions per place. [2023-11-19 08:04:10,027 INFO L140 encePairwiseOnDemand]: 299/304 looper letters, 99 selfloop transitions, 4 changer transitions 39/148 dead transitions. [2023-11-19 08:04:10,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 148 transitions, 899 flow [2023-11-19 08:04:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:04:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 836 transitions. [2023-11-19 08:04:10,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-19 08:04:10,032 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 836 transitions. [2023-11-19 08:04:10,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 836 transitions. [2023-11-19 08:04:10,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:10,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 836 transitions. [2023-11-19 08:04:10,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.2) internal successors, (836), 5 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,043 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,043 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 227 flow. Second operand 5 states and 836 transitions. [2023-11-19 08:04:10,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 148 transitions, 899 flow [2023-11-19 08:04:10,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 148 transitions, 870 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:10,797 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 229 flow [2023-11-19 08:04:10,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-11-19 08:04:10,798 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-11-19 08:04:10,798 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 229 flow [2023-11-19 08:04:10,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:10,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:10,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:10,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:04:10,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:04:10,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1788701847, now seen corresponding path program 2 times [2023-11-19 08:04:10,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:10,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416987619] [2023-11-19 08:04:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:10,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:04:10,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:10,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416987619] [2023-11-19 08:04:10,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416987619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:10,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:10,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:10,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101445149] [2023-11-19 08:04:10,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:10,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:10,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:11,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 304 [2023-11-19 08:04:11,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:11,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:11,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 304 [2023-11-19 08:04:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:13,642 INFO L124 PetriNetUnfolderBase]: 20863/24697 cut-off events. [2023-11-19 08:04:13,642 INFO L125 PetriNetUnfolderBase]: For 34716/34722 co-relation queries the response was YES. [2023-11-19 08:04:13,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84761 conditions, 24697 events. 20863/24697 cut-off events. For 34716/34722 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 93915 event pairs, 986 based on Foata normal form. 629/25294 useless extension candidates. Maximal degree in co-relation 46906. Up to 19385 conditions per place. [2023-11-19 08:04:13,798 INFO L140 encePairwiseOnDemand]: 299/304 looper letters, 121 selfloop transitions, 6 changer transitions 0/133 dead transitions. [2023-11-19 08:04:13,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 133 transitions, 813 flow [2023-11-19 08:04:13,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:04:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 823 transitions. [2023-11-19 08:04:13,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414473684210527 [2023-11-19 08:04:13,802 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 823 transitions. [2023-11-19 08:04:13,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 823 transitions. [2023-11-19 08:04:13,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:13,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 823 transitions. [2023-11-19 08:04:13,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:13,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:13,808 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:13,808 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 229 flow. Second operand 5 states and 823 transitions. [2023-11-19 08:04:13,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 133 transitions, 813 flow [2023-11-19 08:04:13,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 133 transitions, 800 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:13,888 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 263 flow [2023-11-19 08:04:13,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2023-11-19 08:04:13,889 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 16 predicate places. [2023-11-19 08:04:13,889 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 263 flow [2023-11-19 08:04:13,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:13,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:13,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:13,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:04:13,890 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:04:13,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2103990155, now seen corresponding path program 1 times [2023-11-19 08:04:13,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:13,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539624151] [2023-11-19 08:04:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:13,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 08:04:14,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:14,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539624151] [2023-11-19 08:04:14,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539624151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:14,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:14,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860610912] [2023-11-19 08:04:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:14,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:14,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 304 [2023-11-19 08:04:14,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 263 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:14,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:14,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 304 [2023-11-19 08:04:14,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:16,165 INFO L124 PetriNetUnfolderBase]: 20061/23909 cut-off events. [2023-11-19 08:04:16,166 INFO L125 PetriNetUnfolderBase]: For 43375/43375 co-relation queries the response was YES. [2023-11-19 08:04:16,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87109 conditions, 23909 events. 20061/23909 cut-off events. For 43375/43375 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 91514 event pairs, 769 based on Foata normal form. 804/24665 useless extension candidates. Maximal degree in co-relation 75121. Up to 17269 conditions per place. [2023-11-19 08:04:16,654 INFO L140 encePairwiseOnDemand]: 299/304 looper letters, 133 selfloop transitions, 6 changer transitions 0/145 dead transitions. [2023-11-19 08:04:16,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 145 transitions, 982 flow [2023-11-19 08:04:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:04:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:04:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 823 transitions. [2023-11-19 08:04:16,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414473684210527 [2023-11-19 08:04:16,659 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 823 transitions. [2023-11-19 08:04:16,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 823 transitions. [2023-11-19 08:04:16,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:16,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 823 transitions. [2023-11-19 08:04:16,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 164.6) internal successors, (823), 5 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:16,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:16,670 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 304.0) internal successors, (1824), 6 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:16,670 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 263 flow. Second operand 5 states and 823 transitions. [2023-11-19 08:04:16,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 145 transitions, 982 flow [2023-11-19 08:04:16,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 145 transitions, 949 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-19 08:04:16,984 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 295 flow [2023-11-19 08:04:16,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=304, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=295, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2023-11-19 08:04:16,986 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2023-11-19 08:04:16,986 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 295 flow [2023-11-19 08:04:16,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:16,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:16,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:04:16,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:04:16,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-19 08:04:16,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:16,988 INFO L85 PathProgramCache]: Analyzing trace with hash -264802222, now seen corresponding path program 1 times [2023-11-19 08:04:16,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:16,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069977135] [2023-11-19 08:04:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:16,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 08:04:17,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:17,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069977135] [2023-11-19 08:04:17,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069977135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:17,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:17,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:04:17,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154860623] [2023-11-19 08:04:17,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:17,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:04:17,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:17,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:04:17,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:04:17,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 304 [2023-11-19 08:04:17,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 295 flow. Second operand has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:17,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:17,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 304 [2023-11-19 08:04:17,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand