./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 21:05:17,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:05:17,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:05:17,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:05:17,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:05:17,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:05:17,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:05:17,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:05:17,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:05:17,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:05:17,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:05:17,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:05:17,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:05:17,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:05:17,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:05:17,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:05:17,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:05:17,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:05:17,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:05:17,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:05:17,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:05:17,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:05:17,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:05:17,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:05:17,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:05:17,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:05:17,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:05:17,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:05:17,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:05:17,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:05:17,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:05:17,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:05:17,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:05:17,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:05:17,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:05:17,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:05:17,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:05:17,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:05:17,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:05:17,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:05:17,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:05:17,223 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:05:17,269 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:05:17,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:05:17,270 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:05:17,270 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:05:17,271 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:05:17,271 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:05:17,272 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:05:17,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:05:17,272 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:05:17,273 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:05:17,274 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:05:17,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:05:17,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:05:17,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:05:17,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:05:17,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:05:17,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:05:17,275 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:05:17,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:05:17,276 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:05:17,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:05:17,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:05:17,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:05:17,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:05:17,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:05:17,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:05:17,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:05:17,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:05:17,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:05:17,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:05:17,278 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:05:17,278 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:05:17,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:05:17,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23bd321b64eb98f17ff91aefc669d9f5b78966b876ea50803bd27f8c9b624679 [2022-11-02 21:05:17,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:05:17,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:05:17,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:05:17,615 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:05:17,616 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:05:17,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-02 21:05:17,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/data/0d06a8e2a/e26be8220f814e6b94fc27ea29e99c2b/FLAGf48e0487a [2022-11-02 21:05:18,213 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:05:18,214 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2022-11-02 21:05:18,223 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/data/0d06a8e2a/e26be8220f814e6b94fc27ea29e99c2b/FLAGf48e0487a [2022-11-02 21:05:18,554 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/data/0d06a8e2a/e26be8220f814e6b94fc27ea29e99c2b [2022-11-02 21:05:18,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:05:18,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:05:18,560 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:05:18,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:05:18,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:05:18,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:18,566 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f04dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18, skipping insertion in model container [2022-11-02 21:05:18,567 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:18,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:05:18,592 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:05:18,826 WARN L230 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_8c6678dd-8139-4560-bc76-c0a44f3aec75/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-02 21:05:18,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:05:18,860 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:05:18,908 WARN L230 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_8c6678dd-8139-4560-bc76-c0a44f3aec75/sv-benchmarks/c/weaver/array-eq-trans.wvr.c[2737,2750] [2022-11-02 21:05:18,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:05:18,936 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:05:18,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18 WrapperNode [2022-11-02 21:05:18,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:05:18,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:05:18,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:05:18,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:05:18,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:18,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,015 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 204 [2022-11-02 21:05:19,017 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:05:19,018 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:05:19,018 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:05:19,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:05:19,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,082 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,084 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:05:19,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:05:19,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:05:19,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:05:19,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (1/1) ... [2022-11-02 21:05:19,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:05:19,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:19,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:05:19,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:05:19,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:05:19,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 21:05:19,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 21:05:19,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 21:05:19,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 21:05:19,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-02 21:05:19,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-02 21:05:19,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:05:19,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:05:19,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:05:19,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:05:19,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:05:19,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:05:19,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:05:19,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:05:19,181 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 21:05:19,334 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:05:19,336 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:05:19,816 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:05:19,828 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:05:19,828 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-02 21:05:19,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:05:19 BoogieIcfgContainer [2022-11-02 21:05:19,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:05:19,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:05:19,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:05:19,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:05:19,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:05:18" (1/3) ... [2022-11-02 21:05:19,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f365f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:05:19, skipping insertion in model container [2022-11-02 21:05:19,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:18" (2/3) ... [2022-11-02 21:05:19,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f365f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:05:19, skipping insertion in model container [2022-11-02 21:05:19,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:05:19" (3/3) ... [2022-11-02 21:05:19,842 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2022-11-02 21:05:19,852 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:05:19,862 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:05:19,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:05:19,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:05:20,002 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 21:05:20,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 286 places, 306 transitions, 636 flow [2022-11-02 21:05:20,268 INFO L130 PetriNetUnfolder]: 30/303 cut-off events. [2022-11-02 21:05:20,269 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 21:05:20,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 303 events. 30/303 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 236 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 201. Up to 3 conditions per place. [2022-11-02 21:05:20,274 INFO L82 GeneralOperation]: Start removeDead. Operand has 286 places, 306 transitions, 636 flow [2022-11-02 21:05:20,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 292 transitions, 602 flow [2022-11-02 21:05:20,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:05:20,300 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@778ca7ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:05:20,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 21:05:20,411 INFO L130 PetriNetUnfolder]: 30/291 cut-off events. [2022-11-02 21:05:20,411 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 21:05:20,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:20,412 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:20,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash -395225632, now seen corresponding path program 1 times [2022-11-02 21:05:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:20,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625790281] [2022-11-02 21:05:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:21,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:21,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625790281] [2022-11-02 21:05:21,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625790281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:21,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:21,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:05:21,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234452268] [2022-11-02 21:05:21,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:21,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:05:21,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:21,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:05:21,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:21,310 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 306 [2022-11-02 21:05:21,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 292 transitions, 602 flow. Second operand has 5 states, 5 states have (on average 242.2) internal successors, (1211), 5 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:21,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:21,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 306 [2022-11-02 21:05:21,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:21,582 INFO L130 PetriNetUnfolder]: 14/282 cut-off events. [2022-11-02 21:05:21,582 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-02 21:05:21,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 282 events. 14/282 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 235 event pairs, 0 based on Foata normal form. 22/280 useless extension candidates. Maximal degree in co-relation 223. Up to 48 conditions per place. [2022-11-02 21:05:21,588 INFO L137 encePairwiseOnDemand]: 278/306 looper letters, 47 selfloop transitions, 0 changer transitions 14/281 dead transitions. [2022-11-02 21:05:21,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 281 transitions, 702 flow [2022-11-02 21:05:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:05:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:05:21,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1476 transitions. [2022-11-02 21:05:21,616 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.803921568627451 [2022-11-02 21:05:21,617 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1476 transitions. [2022-11-02 21:05:21,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1476 transitions. [2022-11-02 21:05:21,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:21,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1476 transitions. [2022-11-02 21:05:21,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:21,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:21,646 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:21,648 INFO L175 Difference]: Start difference. First operand has 272 places, 292 transitions, 602 flow. Second operand 6 states and 1476 transitions. [2022-11-02 21:05:21,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 281 transitions, 702 flow [2022-11-02 21:05:21,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 281 transitions, 690 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-02 21:05:21,667 INFO L231 Difference]: Finished difference. Result has 274 places, 267 transitions, 546 flow [2022-11-02 21:05:21,669 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=546, PETRI_PLACES=274, PETRI_TRANSITIONS=267} [2022-11-02 21:05:21,673 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 2 predicate places. [2022-11-02 21:05:21,674 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 267 transitions, 546 flow [2022-11-02 21:05:21,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 242.2) internal successors, (1211), 5 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:21,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:21,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:21,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:05:21,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:21,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:21,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1666082714, now seen corresponding path program 1 times [2022-11-02 21:05:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:21,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374045979] [2022-11-02 21:05:21,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:21,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:22,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:22,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374045979] [2022-11-02 21:05:22,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374045979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:22,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:22,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 21:05:22,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184631208] [2022-11-02 21:05:22,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:22,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:05:22,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:22,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:05:22,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:05:22,514 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 306 [2022-11-02 21:05:22,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 267 transitions, 546 flow. Second operand has 11 states, 11 states have (on average 217.27272727272728) internal successors, (2390), 11 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:22,517 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:22,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 306 [2022-11-02 21:05:22,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:23,565 INFO L130 PetriNetUnfolder]: 253/1391 cut-off events. [2022-11-02 21:05:23,565 INFO L131 PetriNetUnfolder]: For 56/72 co-relation queries the response was YES. [2022-11-02 21:05:23,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 1391 events. 253/1391 cut-off events. For 56/72 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 7337 event pairs, 62 based on Foata normal form. 2/1246 useless extension candidates. Maximal degree in co-relation 1998. Up to 161 conditions per place. [2022-11-02 21:05:23,583 INFO L137 encePairwiseOnDemand]: 281/306 looper letters, 204 selfloop transitions, 26 changer transitions 9/430 dead transitions. [2022-11-02 21:05:23,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 430 transitions, 1378 flow [2022-11-02 21:05:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 21:05:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-02 21:05:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 3866 transitions. [2022-11-02 21:05:23,592 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7431757016532103 [2022-11-02 21:05:23,593 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 3866 transitions. [2022-11-02 21:05:23,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 3866 transitions. [2022-11-02 21:05:23,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:23,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 3866 transitions. [2022-11-02 21:05:23,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 227.41176470588235) internal successors, (3866), 17 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:23,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 306.0) internal successors, (5508), 18 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:23,619 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 306.0) internal successors, (5508), 18 states have internal predecessors, (5508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:23,620 INFO L175 Difference]: Start difference. First operand has 274 places, 267 transitions, 546 flow. Second operand 17 states and 3866 transitions. [2022-11-02 21:05:23,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 430 transitions, 1378 flow [2022-11-02 21:05:23,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 430 transitions, 1364 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-02 21:05:23,633 INFO L231 Difference]: Finished difference. Result has 286 places, 287 transitions, 723 flow [2022-11-02 21:05:23,634 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=723, PETRI_PLACES=286, PETRI_TRANSITIONS=287} [2022-11-02 21:05:23,635 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 14 predicate places. [2022-11-02 21:05:23,635 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 287 transitions, 723 flow [2022-11-02 21:05:23,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 217.27272727272728) internal successors, (2390), 11 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:23,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:23,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:23,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:05:23,639 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:23,641 INFO L85 PathProgramCache]: Analyzing trace with hash 663602744, now seen corresponding path program 1 times [2022-11-02 21:05:23,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:23,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236676911] [2022-11-02 21:05:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:23,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:05:24,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:24,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236676911] [2022-11-02 21:05:24,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236676911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:24,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:24,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 21:05:24,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484432345] [2022-11-02 21:05:24,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:24,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:05:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:24,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:05:24,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:05:24,538 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 306 [2022-11-02 21:05:24,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 287 transitions, 723 flow. Second operand has 11 states, 11 states have (on average 194.54545454545453) internal successors, (2140), 11 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:24,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:24,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 306 [2022-11-02 21:05:24,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:25,514 INFO L130 PetriNetUnfolder]: 143/1066 cut-off events. [2022-11-02 21:05:25,514 INFO L131 PetriNetUnfolder]: For 196/210 co-relation queries the response was YES. [2022-11-02 21:05:25,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 1066 events. 143/1066 cut-off events. For 196/210 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4988 event pairs, 48 based on Foata normal form. 2/998 useless extension candidates. Maximal degree in co-relation 1673. Up to 170 conditions per place. [2022-11-02 21:05:25,526 INFO L137 encePairwiseOnDemand]: 277/306 looper letters, 126 selfloop transitions, 18 changer transitions 67/386 dead transitions. [2022-11-02 21:05:25,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 386 transitions, 1376 flow [2022-11-02 21:05:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 21:05:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-02 21:05:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3782 transitions. [2022-11-02 21:05:25,535 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6504987960096319 [2022-11-02 21:05:25,535 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3782 transitions. [2022-11-02 21:05:25,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3782 transitions. [2022-11-02 21:05:25,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:25,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3782 transitions. [2022-11-02 21:05:25,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 199.05263157894737) internal successors, (3782), 19 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:25,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 306.0) internal successors, (6120), 20 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:25,563 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 306.0) internal successors, (6120), 20 states have internal predecessors, (6120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:25,563 INFO L175 Difference]: Start difference. First operand has 286 places, 287 transitions, 723 flow. Second operand 19 states and 3782 transitions. [2022-11-02 21:05:25,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 386 transitions, 1376 flow [2022-11-02 21:05:25,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 386 transitions, 1358 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-02 21:05:25,576 INFO L231 Difference]: Finished difference. Result has 303 places, 278 transitions, 715 flow [2022-11-02 21:05:25,577 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=715, PETRI_PLACES=303, PETRI_TRANSITIONS=278} [2022-11-02 21:05:25,579 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 31 predicate places. [2022-11-02 21:05:25,580 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 278 transitions, 715 flow [2022-11-02 21:05:25,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 194.54545454545453) internal successors, (2140), 11 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:25,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:25,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:25,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:05:25,582 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:25,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1588183948, now seen corresponding path program 1 times [2022-11-02 21:05:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:25,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285521646] [2022-11-02 21:05:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:25,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:25,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285521646] [2022-11-02 21:05:25,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285521646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:25,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:25,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:05:25,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617695245] [2022-11-02 21:05:25,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:25,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:05:25,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:25,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:05:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:05:25,876 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 306 [2022-11-02 21:05:25,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 278 transitions, 715 flow. Second operand has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:25,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:25,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 306 [2022-11-02 21:05:25,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:26,118 INFO L130 PetriNetUnfolder]: 33/537 cut-off events. [2022-11-02 21:05:26,119 INFO L131 PetriNetUnfolder]: For 82/92 co-relation queries the response was YES. [2022-11-02 21:05:26,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 537 events. 33/537 cut-off events. For 82/92 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1526 event pairs, 3 based on Foata normal form. 3/511 useless extension candidates. Maximal degree in co-relation 788. Up to 106 conditions per place. [2022-11-02 21:05:26,123 INFO L137 encePairwiseOnDemand]: 300/306 looper letters, 55 selfloop transitions, 4 changer transitions 7/284 dead transitions. [2022-11-02 21:05:26,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 284 transitions, 867 flow [2022-11-02 21:05:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:05:26,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:05:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1426 transitions. [2022-11-02 21:05:26,127 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7766884531590414 [2022-11-02 21:05:26,127 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1426 transitions. [2022-11-02 21:05:26,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1426 transitions. [2022-11-02 21:05:26,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:26,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1426 transitions. [2022-11-02 21:05:26,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.66666666666666) internal successors, (1426), 6 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:26,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:26,141 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:26,141 INFO L175 Difference]: Start difference. First operand has 303 places, 278 transitions, 715 flow. Second operand 6 states and 1426 transitions. [2022-11-02 21:05:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 284 transitions, 867 flow [2022-11-02 21:05:26,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 284 transitions, 799 flow, removed 19 selfloop flow, removed 19 redundant places. [2022-11-02 21:05:26,152 INFO L231 Difference]: Finished difference. Result has 282 places, 277 transitions, 659 flow [2022-11-02 21:05:26,153 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=659, PETRI_PLACES=282, PETRI_TRANSITIONS=277} [2022-11-02 21:05:26,154 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 10 predicate places. [2022-11-02 21:05:26,159 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 277 transitions, 659 flow [2022-11-02 21:05:26,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:26,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:26,161 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:26,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:05:26,162 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:26,162 INFO L85 PathProgramCache]: Analyzing trace with hash -176102740, now seen corresponding path program 1 times [2022-11-02 21:05:26,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:26,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96758452] [2022-11-02 21:05:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:26,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:26,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:26,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96758452] [2022-11-02 21:05:26,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96758452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:26,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:26,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 21:05:26,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505286242] [2022-11-02 21:05:26,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:26,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:05:26,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:05:26,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:05:26,524 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-11-02 21:05:26,527 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 277 transitions, 659 flow. Second operand has 8 states, 8 states have (on average 232.125) internal successors, (1857), 8 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:26,527 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:26,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-11-02 21:05:26,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:27,054 INFO L130 PetriNetUnfolder]: 211/1287 cut-off events. [2022-11-02 21:05:27,055 INFO L131 PetriNetUnfolder]: For 208/262 co-relation queries the response was YES. [2022-11-02 21:05:27,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1934 conditions, 1287 events. 211/1287 cut-off events. For 208/262 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 7199 event pairs, 67 based on Foata normal form. 11/1164 useless extension candidates. Maximal degree in co-relation 1918. Up to 165 conditions per place. [2022-11-02 21:05:27,069 INFO L137 encePairwiseOnDemand]: 292/306 looper letters, 104 selfloop transitions, 14 changer transitions 2/327 dead transitions. [2022-11-02 21:05:27,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 327 transitions, 1020 flow [2022-11-02 21:05:27,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:05:27,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 21:05:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2603 transitions. [2022-11-02 21:05:27,076 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.773321449792038 [2022-11-02 21:05:27,077 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2603 transitions. [2022-11-02 21:05:27,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2603 transitions. [2022-11-02 21:05:27,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:27,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2603 transitions. [2022-11-02 21:05:27,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 236.63636363636363) internal successors, (2603), 11 states have internal predecessors, (2603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:27,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:27,095 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:27,096 INFO L175 Difference]: Start difference. First operand has 282 places, 277 transitions, 659 flow. Second operand 11 states and 2603 transitions. [2022-11-02 21:05:27,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 327 transitions, 1020 flow [2022-11-02 21:05:27,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 327 transitions, 1000 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-11-02 21:05:27,104 INFO L231 Difference]: Finished difference. Result has 286 places, 281 transitions, 693 flow [2022-11-02 21:05:27,105 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=693, PETRI_PLACES=286, PETRI_TRANSITIONS=281} [2022-11-02 21:05:27,108 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 14 predicate places. [2022-11-02 21:05:27,108 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 281 transitions, 693 flow [2022-11-02 21:05:27,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.125) internal successors, (1857), 8 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:27,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:27,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:27,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:05:27,118 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:27,119 INFO L85 PathProgramCache]: Analyzing trace with hash 889343353, now seen corresponding path program 1 times [2022-11-02 21:05:27,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:27,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930272371] [2022-11-02 21:05:27,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:27,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:27,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:27,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930272371] [2022-11-02 21:05:27,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930272371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:27,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504362804] [2022-11-02 21:05:27,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:27,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:27,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:27,531 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:27,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:05:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:05:27,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:28,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:28,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504362804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:28,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:05:28,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-02 21:05:28,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984943640] [2022-11-02 21:05:28,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:28,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:05:28,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:28,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:05:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:05:28,161 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 306 [2022-11-02 21:05:28,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 281 transitions, 693 flow. Second operand has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:28,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:28,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 306 [2022-11-02 21:05:28,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:28,779 INFO L130 PetriNetUnfolder]: 488/2211 cut-off events. [2022-11-02 21:05:28,779 INFO L131 PetriNetUnfolder]: For 383/396 co-relation queries the response was YES. [2022-11-02 21:05:28,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3294 conditions, 2211 events. 488/2211 cut-off events. For 383/396 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 14729 event pairs, 164 based on Foata normal form. 18/1947 useless extension candidates. Maximal degree in co-relation 3279. Up to 346 conditions per place. [2022-11-02 21:05:28,798 INFO L137 encePairwiseOnDemand]: 296/306 looper letters, 88 selfloop transitions, 11 changer transitions 0/316 dead transitions. [2022-11-02 21:05:28,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 316 transitions, 974 flow [2022-11-02 21:05:28,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:05:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-02 21:05:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1950 transitions. [2022-11-02 21:05:28,803 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7965686274509803 [2022-11-02 21:05:28,803 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1950 transitions. [2022-11-02 21:05:28,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1950 transitions. [2022-11-02 21:05:28,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:28,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1950 transitions. [2022-11-02 21:05:28,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 243.75) internal successors, (1950), 8 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:28,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:28,815 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 306.0) internal successors, (2754), 9 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:28,815 INFO L175 Difference]: Start difference. First operand has 286 places, 281 transitions, 693 flow. Second operand 8 states and 1950 transitions. [2022-11-02 21:05:28,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 316 transitions, 974 flow [2022-11-02 21:05:28,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 316 transitions, 964 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-02 21:05:28,824 INFO L231 Difference]: Finished difference. Result has 291 places, 284 transitions, 730 flow [2022-11-02 21:05:28,824 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=730, PETRI_PLACES=291, PETRI_TRANSITIONS=284} [2022-11-02 21:05:28,825 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 19 predicate places. [2022-11-02 21:05:28,825 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 284 transitions, 730 flow [2022-11-02 21:05:28,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 238.57142857142858) internal successors, (1670), 7 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:28,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:28,827 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:28,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:29,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 21:05:29,043 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash 245708421, now seen corresponding path program 1 times [2022-11-02 21:05:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:29,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302300147] [2022-11-02 21:05:29,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:29,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:29,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302300147] [2022-11-02 21:05:29,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302300147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:29,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216627897] [2022-11-02 21:05:29,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:29,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:29,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:29,384 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:29,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:05:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:29,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 21:05:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:30,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:05:31,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216627897] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:31,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:31,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9, 11] total 26 [2022-11-02 21:05:31,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377010995] [2022-11-02 21:05:31,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:31,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:05:31,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:31,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:05:31,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-11-02 21:05:31,094 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 306 [2022-11-02 21:05:31,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 284 transitions, 730 flow. Second operand has 11 states, 11 states have (on average 222.45454545454547) internal successors, (2447), 11 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:31,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:31,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 306 [2022-11-02 21:05:31,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:32,383 INFO L130 PetriNetUnfolder]: 920/4169 cut-off events. [2022-11-02 21:05:32,383 INFO L131 PetriNetUnfolder]: For 982/1003 co-relation queries the response was YES. [2022-11-02 21:05:32,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6683 conditions, 4169 events. 920/4169 cut-off events. For 982/1003 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 34156 event pairs, 329 based on Foata normal form. 3/3717 useless extension candidates. Maximal degree in co-relation 6666. Up to 531 conditions per place. [2022-11-02 21:05:32,416 INFO L137 encePairwiseOnDemand]: 292/306 looper letters, 142 selfloop transitions, 18 changer transitions 3/359 dead transitions. [2022-11-02 21:05:32,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 359 transitions, 1275 flow [2022-11-02 21:05:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:05:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-02 21:05:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3408 transitions. [2022-11-02 21:05:32,423 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.742483660130719 [2022-11-02 21:05:32,424 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3408 transitions. [2022-11-02 21:05:32,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3408 transitions. [2022-11-02 21:05:32,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:32,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3408 transitions. [2022-11-02 21:05:32,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 227.2) internal successors, (3408), 15 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,441 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,442 INFO L175 Difference]: Start difference. First operand has 291 places, 284 transitions, 730 flow. Second operand 15 states and 3408 transitions. [2022-11-02 21:05:32,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 359 transitions, 1275 flow [2022-11-02 21:05:32,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 359 transitions, 1262 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 21:05:32,451 INFO L231 Difference]: Finished difference. Result has 308 places, 292 transitions, 827 flow [2022-11-02 21:05:32,452 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=827, PETRI_PLACES=308, PETRI_TRANSITIONS=292} [2022-11-02 21:05:32,453 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 36 predicate places. [2022-11-02 21:05:32,453 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 292 transitions, 827 flow [2022-11-02 21:05:32,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 222.45454545454547) internal successors, (2447), 11 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:32,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:32,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:32,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:32,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:32,681 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:32,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1712671916, now seen corresponding path program 1 times [2022-11-02 21:05:32,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:32,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421356305] [2022-11-02 21:05:32,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:32,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:05:33,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:33,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421356305] [2022-11-02 21:05:33,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421356305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:33,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155454757] [2022-11-02 21:05:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:33,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:33,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:33,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:33,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:05:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:05:33,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:05:33,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:05:34,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155454757] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:34,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:34,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-11-02 21:05:34,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774988892] [2022-11-02 21:05:34,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:34,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:05:34,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:34,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:05:34,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:05:34,308 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-11-02 21:05:34,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 292 transitions, 827 flow. Second operand has 8 states, 8 states have (on average 232.125) internal successors, (1857), 8 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:34,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:34,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-11-02 21:05:34,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:35,850 INFO L130 PetriNetUnfolder]: 873/5415 cut-off events. [2022-11-02 21:05:35,850 INFO L131 PetriNetUnfolder]: For 2207/2317 co-relation queries the response was YES. [2022-11-02 21:05:35,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8876 conditions, 5415 events. 873/5415 cut-off events. For 2207/2317 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 50612 event pairs, 287 based on Foata normal form. 50/4947 useless extension candidates. Maximal degree in co-relation 8853. Up to 643 conditions per place. [2022-11-02 21:05:35,901 INFO L137 encePairwiseOnDemand]: 290/306 looper letters, 122 selfloop transitions, 22 changer transitions 1/363 dead transitions. [2022-11-02 21:05:35,901 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 363 transitions, 1341 flow [2022-11-02 21:05:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:05:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-02 21:05:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3524 transitions. [2022-11-02 21:05:35,910 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7677559912854031 [2022-11-02 21:05:35,911 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3524 transitions. [2022-11-02 21:05:35,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3524 transitions. [2022-11-02 21:05:35,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:35,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3524 transitions. [2022-11-02 21:05:35,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 234.93333333333334) internal successors, (3524), 15 states have internal predecessors, (3524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:35,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:35,932 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:35,932 INFO L175 Difference]: Start difference. First operand has 308 places, 292 transitions, 827 flow. Second operand 15 states and 3524 transitions. [2022-11-02 21:05:35,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 363 transitions, 1341 flow [2022-11-02 21:05:35,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 363 transitions, 1308 flow, removed 8 selfloop flow, removed 7 redundant places. [2022-11-02 21:05:35,950 INFO L231 Difference]: Finished difference. Result has 321 places, 304 transitions, 924 flow [2022-11-02 21:05:35,951 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=924, PETRI_PLACES=321, PETRI_TRANSITIONS=304} [2022-11-02 21:05:35,953 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 49 predicate places. [2022-11-02 21:05:35,953 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 304 transitions, 924 flow [2022-11-02 21:05:35,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.125) internal successors, (1857), 8 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:35,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:35,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:35,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:36,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:36,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1583245865, now seen corresponding path program 1 times [2022-11-02 21:05:36,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:36,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705117051] [2022-11-02 21:05:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:36,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:05:36,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:36,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705117051] [2022-11-02 21:05:36,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705117051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:36,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006236073] [2022-11-02 21:05:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:36,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:36,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:36,565 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:36,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:05:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:36,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:05:36,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:05:37,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:05:37,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006236073] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:37,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:37,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-11-02 21:05:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997638798] [2022-11-02 21:05:37,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:37,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:05:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:05:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:05:37,665 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-11-02 21:05:37,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 304 transitions, 924 flow. Second operand has 8 states, 8 states have (on average 232.25) internal successors, (1858), 8 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:37,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:37,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-11-02 21:05:37,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:38,669 INFO L130 PetriNetUnfolder]: 363/3496 cut-off events. [2022-11-02 21:05:38,670 INFO L131 PetriNetUnfolder]: For 1258/1374 co-relation queries the response was YES. [2022-11-02 21:05:38,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5383 conditions, 3496 events. 363/3496 cut-off events. For 1258/1374 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 29250 event pairs, 121 based on Foata normal form. 23/3284 useless extension candidates. Maximal degree in co-relation 5355. Up to 393 conditions per place. [2022-11-02 21:05:38,698 INFO L137 encePairwiseOnDemand]: 295/306 looper letters, 95 selfloop transitions, 17 changer transitions 6/329 dead transitions. [2022-11-02 21:05:38,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 329 transitions, 1204 flow [2022-11-02 21:05:38,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:05:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-02 21:05:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2591 transitions. [2022-11-02 21:05:38,707 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7697563874034462 [2022-11-02 21:05:38,707 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2591 transitions. [2022-11-02 21:05:38,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2591 transitions. [2022-11-02 21:05:38,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:38,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2591 transitions. [2022-11-02 21:05:38,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 235.54545454545453) internal successors, (2591), 11 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:38,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:38,721 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 306.0) internal successors, (3672), 12 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:38,721 INFO L175 Difference]: Start difference. First operand has 321 places, 304 transitions, 924 flow. Second operand 11 states and 2591 transitions. [2022-11-02 21:05:38,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 329 transitions, 1204 flow [2022-11-02 21:05:38,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 329 transitions, 1173 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-11-02 21:05:38,733 INFO L231 Difference]: Finished difference. Result has 321 places, 293 transitions, 867 flow [2022-11-02 21:05:38,734 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=867, PETRI_PLACES=321, PETRI_TRANSITIONS=293} [2022-11-02 21:05:38,735 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 49 predicate places. [2022-11-02 21:05:38,735 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 293 transitions, 867 flow [2022-11-02 21:05:38,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.25) internal successors, (1858), 8 states have internal predecessors, (1858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:38,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:38,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:38,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:38,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 21:05:38,951 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:38,952 INFO L85 PathProgramCache]: Analyzing trace with hash 45230378, now seen corresponding path program 1 times [2022-11-02 21:05:38,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:38,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065307965] [2022-11-02 21:05:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:38,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:39,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:39,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065307965] [2022-11-02 21:05:39,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065307965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:39,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:39,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:05:39,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037667304] [2022-11-02 21:05:39,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:39,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:05:39,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:39,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:05:39,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:05:39,189 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 306 [2022-11-02 21:05:39,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 293 transitions, 867 flow. Second operand has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:39,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:39,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 306 [2022-11-02 21:05:39,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:39,758 INFO L130 PetriNetUnfolder]: 67/2444 cut-off events. [2022-11-02 21:05:39,758 INFO L131 PetriNetUnfolder]: For 588/597 co-relation queries the response was YES. [2022-11-02 21:05:39,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3938 conditions, 2444 events. 67/2444 cut-off events. For 588/597 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 19541 event pairs, 4 based on Foata normal form. 27/2367 useless extension candidates. Maximal degree in co-relation 3911. Up to 597 conditions per place. [2022-11-02 21:05:39,777 INFO L137 encePairwiseOnDemand]: 300/306 looper letters, 52 selfloop transitions, 5 changer transitions 7/299 dead transitions. [2022-11-02 21:05:39,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 299 transitions, 1018 flow [2022-11-02 21:05:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:05:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:05:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1426 transitions. [2022-11-02 21:05:39,781 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7766884531590414 [2022-11-02 21:05:39,781 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1426 transitions. [2022-11-02 21:05:39,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1426 transitions. [2022-11-02 21:05:39,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:39,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1426 transitions. [2022-11-02 21:05:39,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 237.66666666666666) internal successors, (1426), 6 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:39,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:39,792 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 306.0) internal successors, (2142), 7 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:39,793 INFO L175 Difference]: Start difference. First operand has 321 places, 293 transitions, 867 flow. Second operand 6 states and 1426 transitions. [2022-11-02 21:05:39,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 299 transitions, 1018 flow [2022-11-02 21:05:39,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 299 transitions, 976 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-02 21:05:39,804 INFO L231 Difference]: Finished difference. Result has 314 places, 292 transitions, 839 flow [2022-11-02 21:05:39,805 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=839, PETRI_PLACES=314, PETRI_TRANSITIONS=292} [2022-11-02 21:05:39,806 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 42 predicate places. [2022-11-02 21:05:39,806 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 292 transitions, 839 flow [2022-11-02 21:05:39,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.33333333333334) internal successors, (1418), 6 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:39,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:39,807 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:39,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 21:05:39,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash -965160203, now seen corresponding path program 1 times [2022-11-02 21:05:39,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:39,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656944186] [2022-11-02 21:05:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:39,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:05:40,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:40,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656944186] [2022-11-02 21:05:40,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656944186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:40,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141253490] [2022-11-02 21:05:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:40,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:40,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:40,276 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:40,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:05:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:05:40,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:40,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:40,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141253490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:40,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:05:40,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2022-11-02 21:05:40,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061053324] [2022-11-02 21:05:40,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:40,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:05:40,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:40,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:05:40,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:05:40,931 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-11-02 21:05:40,933 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 292 transitions, 839 flow. Second operand has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:40,934 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:40,934 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-11-02 21:05:40,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:42,111 INFO L130 PetriNetUnfolder]: 891/4438 cut-off events. [2022-11-02 21:05:42,111 INFO L131 PetriNetUnfolder]: For 2243/2281 co-relation queries the response was YES. [2022-11-02 21:05:42,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7502 conditions, 4438 events. 891/4438 cut-off events. For 2243/2281 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 40388 event pairs, 322 based on Foata normal form. 21/4038 useless extension candidates. Maximal degree in co-relation 7474. Up to 808 conditions per place. [2022-11-02 21:05:42,154 INFO L137 encePairwiseOnDemand]: 294/306 looper letters, 86 selfloop transitions, 8 changer transitions 11/322 dead transitions. [2022-11-02 21:05:42,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 322 transitions, 1127 flow [2022-11-02 21:05:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:05:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 21:05:42,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2135 transitions. [2022-11-02 21:05:42,158 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7752360203340596 [2022-11-02 21:05:42,159 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2135 transitions. [2022-11-02 21:05:42,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2135 transitions. [2022-11-02 21:05:42,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:42,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2135 transitions. [2022-11-02 21:05:42,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 237.22222222222223) internal successors, (2135), 9 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:42,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:42,169 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 306.0) internal successors, (3060), 10 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:42,169 INFO L175 Difference]: Start difference. First operand has 314 places, 292 transitions, 839 flow. Second operand 9 states and 2135 transitions. [2022-11-02 21:05:42,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 322 transitions, 1127 flow [2022-11-02 21:05:42,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 322 transitions, 1111 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-02 21:05:42,183 INFO L231 Difference]: Finished difference. Result has 316 places, 291 transitions, 839 flow [2022-11-02 21:05:42,184 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=839, PETRI_PLACES=316, PETRI_TRANSITIONS=291} [2022-11-02 21:05:42,184 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 44 predicate places. [2022-11-02 21:05:42,184 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 291 transitions, 839 flow [2022-11-02 21:05:42,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.625) internal successors, (1861), 8 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:42,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:42,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:42,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:05:42,399 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash -430210125, now seen corresponding path program 1 times [2022-11-02 21:05:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:42,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144935666] [2022-11-02 21:05:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:42,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:42,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144935666] [2022-11-02 21:05:42,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144935666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:42,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429846085] [2022-11-02 21:05:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:42,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:42,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:42,727 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:42,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:05:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 21:05:42,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:43,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:44,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429846085] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:44,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:44,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 25 [2022-11-02 21:05:44,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997399763] [2022-11-02 21:05:44,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:44,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:05:44,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:44,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:05:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:05:44,446 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 306 [2022-11-02 21:05:44,448 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 291 transitions, 839 flow. Second operand has 11 states, 11 states have (on average 222.8181818181818) internal successors, (2451), 11 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:44,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:44,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 306 [2022-11-02 21:05:44,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:45,947 INFO L130 PetriNetUnfolder]: 1355/5891 cut-off events. [2022-11-02 21:05:45,947 INFO L131 PetriNetUnfolder]: For 3419/3544 co-relation queries the response was YES. [2022-11-02 21:05:46,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10558 conditions, 5891 events. 1355/5891 cut-off events. For 3419/3544 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 55335 event pairs, 436 based on Foata normal form. 62/5541 useless extension candidates. Maximal degree in co-relation 10531. Up to 800 conditions per place. [2022-11-02 21:05:46,028 INFO L137 encePairwiseOnDemand]: 290/306 looper letters, 129 selfloop transitions, 13 changer transitions 6/353 dead transitions. [2022-11-02 21:05:46,028 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 353 transitions, 1355 flow [2022-11-02 21:05:46,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:05:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-02 21:05:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3392 transitions. [2022-11-02 21:05:46,033 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7389978213507625 [2022-11-02 21:05:46,033 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3392 transitions. [2022-11-02 21:05:46,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3392 transitions. [2022-11-02 21:05:46,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:46,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3392 transitions. [2022-11-02 21:05:46,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 226.13333333333333) internal successors, (3392), 15 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:46,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:46,048 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 306.0) internal successors, (4896), 16 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:46,048 INFO L175 Difference]: Start difference. First operand has 316 places, 291 transitions, 839 flow. Second operand 15 states and 3392 transitions. [2022-11-02 21:05:46,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 353 transitions, 1355 flow [2022-11-02 21:05:46,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 353 transitions, 1319 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-11-02 21:05:46,068 INFO L231 Difference]: Finished difference. Result has 325 places, 293 transitions, 867 flow [2022-11-02 21:05:46,068 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=867, PETRI_PLACES=325, PETRI_TRANSITIONS=293} [2022-11-02 21:05:46,069 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 53 predicate places. [2022-11-02 21:05:46,069 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 293 transitions, 867 flow [2022-11-02 21:05:46,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 222.8181818181818) internal successors, (2451), 11 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:46,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:46,070 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:46,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:46,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 21:05:46,287 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:46,288 INFO L85 PathProgramCache]: Analyzing trace with hash 398707805, now seen corresponding path program 1 times [2022-11-02 21:05:46,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:46,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586610879] [2022-11-02 21:05:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:46,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:05:46,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586610879] [2022-11-02 21:05:46,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586610879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:46,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989357840] [2022-11-02 21:05:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:46,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:46,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:46,669 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:46,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:05:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:05:46,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:05:47,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:05:47,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989357840] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:47,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:47,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 18 [2022-11-02 21:05:47,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954780083] [2022-11-02 21:05:47,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:47,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:05:47,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:47,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:05:47,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:05:47,839 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 306 [2022-11-02 21:05:47,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 293 transitions, 867 flow. Second operand has 8 states, 8 states have (on average 232.75) internal successors, (1862), 8 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:47,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:47,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 306 [2022-11-02 21:05:47,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:48,942 INFO L130 PetriNetUnfolder]: 827/4826 cut-off events. [2022-11-02 21:05:48,942 INFO L131 PetriNetUnfolder]: For 2160/2296 co-relation queries the response was YES. [2022-11-02 21:05:48,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8072 conditions, 4826 events. 827/4826 cut-off events. For 2160/2296 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 45010 event pairs, 320 based on Foata normal form. 96/4570 useless extension candidates. Maximal degree in co-relation 8042. Up to 632 conditions per place. [2022-11-02 21:05:48,976 INFO L137 encePairwiseOnDemand]: 291/306 looper letters, 92 selfloop transitions, 19 changer transitions 0/331 dead transitions. [2022-11-02 21:05:48,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 331 transitions, 1205 flow [2022-11-02 21:05:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:05:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 21:05:48,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3039 transitions. [2022-11-02 21:05:48,981 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7639517345399698 [2022-11-02 21:05:48,981 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3039 transitions. [2022-11-02 21:05:48,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3039 transitions. [2022-11-02 21:05:48,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:48,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3039 transitions. [2022-11-02 21:05:48,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 233.76923076923077) internal successors, (3039), 13 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:48,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:48,995 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:48,996 INFO L175 Difference]: Start difference. First operand has 325 places, 293 transitions, 867 flow. Second operand 13 states and 3039 transitions. [2022-11-02 21:05:48,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 331 transitions, 1205 flow [2022-11-02 21:05:49,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 331 transitions, 1171 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-11-02 21:05:49,010 INFO L231 Difference]: Finished difference. Result has 326 places, 300 transitions, 918 flow [2022-11-02 21:05:49,010 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=918, PETRI_PLACES=326, PETRI_TRANSITIONS=300} [2022-11-02 21:05:49,011 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 54 predicate places. [2022-11-02 21:05:49,011 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 300 transitions, 918 flow [2022-11-02 21:05:49,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 232.75) internal successors, (1862), 8 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:49,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:49,012 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:49,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:49,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 21:05:49,227 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:49,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:49,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1699340558, now seen corresponding path program 1 times [2022-11-02 21:05:49,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:49,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810800974] [2022-11-02 21:05:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:49,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:05:49,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:49,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810800974] [2022-11-02 21:05:49,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810800974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:49,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726034403] [2022-11-02 21:05:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:49,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:49,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:49,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:49,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:05:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 21:05:49,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:05:50,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:05:51,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726034403] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:51,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-02 21:05:51,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 11] total 25 [2022-11-02 21:05:51,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225292477] [2022-11-02 21:05:51,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:51,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:05:51,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:05:51,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:05:51,331 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 306 [2022-11-02 21:05:51,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 300 transitions, 918 flow. Second operand has 11 states, 11 states have (on average 222.9090909090909) internal successors, (2452), 11 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:51,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:05:51,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 306 [2022-11-02 21:05:51,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:05:52,932 INFO L130 PetriNetUnfolder]: 1240/6600 cut-off events. [2022-11-02 21:05:52,932 INFO L131 PetriNetUnfolder]: For 4690/4913 co-relation queries the response was YES. [2022-11-02 21:05:52,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12177 conditions, 6600 events. 1240/6600 cut-off events. For 4690/4913 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 64535 event pairs, 444 based on Foata normal form. 161/6417 useless extension candidates. Maximal degree in co-relation 12148. Up to 956 conditions per place. [2022-11-02 21:05:52,977 INFO L137 encePairwiseOnDemand]: 292/306 looper letters, 143 selfloop transitions, 12 changer transitions 9/371 dead transitions. [2022-11-02 21:05:52,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 371 transitions, 1529 flow [2022-11-02 21:05:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:05:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 21:05:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2956 transitions. [2022-11-02 21:05:52,985 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.743086978381096 [2022-11-02 21:05:52,985 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2956 transitions. [2022-11-02 21:05:52,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2956 transitions. [2022-11-02 21:05:52,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:05:52,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2956 transitions. [2022-11-02 21:05:52,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 227.3846153846154) internal successors, (2956), 13 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:53,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:53,002 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 306.0) internal successors, (4284), 14 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:53,002 INFO L175 Difference]: Start difference. First operand has 326 places, 300 transitions, 918 flow. Second operand 13 states and 2956 transitions. [2022-11-02 21:05:53,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 371 transitions, 1529 flow [2022-11-02 21:05:53,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 371 transitions, 1506 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-02 21:05:53,028 INFO L231 Difference]: Finished difference. Result has 338 places, 302 transitions, 942 flow [2022-11-02 21:05:53,029 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=306, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=942, PETRI_PLACES=338, PETRI_TRANSITIONS=302} [2022-11-02 21:05:53,029 INFO L287 CegarLoopForPetriNet]: 272 programPoint places, 66 predicate places. [2022-11-02 21:05:53,030 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 302 transitions, 942 flow [2022-11-02 21:05:53,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 222.9090909090909) internal successors, (2452), 11 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:05:53,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:05:53,031 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:53,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 21:05:53,260 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-11-02 21:05:53,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1181881447, now seen corresponding path program 1 times [2022-11-02 21:05:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:53,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803565305] [2022-11-02 21:05:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:53,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:56,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803565305] [2022-11-02 21:05:56,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803565305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:56,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60346587] [2022-11-02 21:05:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:56,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:56,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:56,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:56,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c6678dd-8139-4560-bc76-c0a44f3aec75/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:05:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 21:05:56,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:58,480 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 21:05:58,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-02 21:05:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:05:58,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:03,530 INFO L356 Elim1Store]: treesize reduction 26, result has 89.2 percent of original size [2022-11-02 21:06:03,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 226 [2022-11-02 21:06:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 21:06:05,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60346587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:05,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:06:05,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 13] total 42 [2022-11-02 21:06:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248025525] [2022-11-02 21:06:05,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:05,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 21:06:05,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 21:06:05,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1500, Unknown=4, NotChecked=0, Total=1722 [2022-11-02 21:06:05,428 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 306 [2022-11-02 21:06:05,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 302 transitions, 942 flow. Second operand has 42 states, 42 states have (on average 194.73809523809524) internal successors, (8179), 42 states have internal predecessors, (8179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:06:05,435 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:06:05,435 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 306 [2022-11-02 21:06:05,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:09,542 INFO L130 PetriNetUnfolder]: 134232/212194 cut-off events. [2022-11-02 21:07:09,542 INFO L131 PetriNetUnfolder]: For 211937/211937 co-relation queries the response was YES. [2022-11-02 21:07:11,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500984 conditions, 212194 events. 134232/212194 cut-off events. For 211937/211937 co-relation queries the response was YES. Maximal size of possible extension queue 6110. Compared 1980927 event pairs, 16534 based on Foata normal form. 0/198636 useless extension candidates. Maximal degree in co-relation 500949. Up to 56933 conditions per place. [2022-11-02 21:07:12,325 INFO L137 encePairwiseOnDemand]: 257/306 looper letters, 1425 selfloop transitions, 355 changer transitions 61/2026 dead transitions. [2022-11-02 21:07:12,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 2026 transitions, 10205 flow [2022-11-02 21:07:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-02 21:07:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-11-02 21:07:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 22057 transitions. [2022-11-02 21:07:12,378 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6800160315698607 [2022-11-02 21:07:12,379 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 22057 transitions. [2022-11-02 21:07:12,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 22057 transitions. [2022-11-02 21:07:12,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:12,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 22057 transitions. [2022-11-02 21:07:12,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 208.08490566037736) internal successors, (22057), 106 states have internal predecessors, (22057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:12,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 306.0) internal successors, (32742), 107 states have internal predecessors, (32742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:12,495 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 306.0) internal successors, (32742), 107 states have internal predecessors, (32742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:12,495 INFO L175 Difference]: Start difference. First operand has 338 places, 302 transitions, 942 flow. Second operand 106 states and 22057 transitions. [2022-11-02 21:07:12,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 2026 transitions, 10205 flow