./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.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_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/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_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/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_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/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 e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 --- 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 21:11:30,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:11:30,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:11:30,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:11:30,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:11:30,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:11:30,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:11:30,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:11:30,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:11:30,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:11:30,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:11:30,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:11:30,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:11:30,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:11:30,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:11:30,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:11:30,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:11:30,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:11:30,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:11:30,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:11:30,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:11:30,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:11:30,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:11:30,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:11:30,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:11:30,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:11:30,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:11:30,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:11:30,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:11:30,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:11:30,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:11:30,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:11:30,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:11:30,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:11:30,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:11:30,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:11:30,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:11:30,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:11:30,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:11:30,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:11:30,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:11:30,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:11:30,294 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:11:30,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:11:30,295 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:11:30,295 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:11:30,296 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:11:30,296 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:11:30,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:11:30,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:11:30,297 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:11:30,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:11:30,299 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:11:30,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:11:30,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:11:30,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:11:30,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:11:30,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:11:30,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:11:30,300 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:11:30,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:11:30,301 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:11:30,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:11:30,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:11:30,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:11:30,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:11:30,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:11:30,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:11:30,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:11:30,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:11:30,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:11:30,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:11:30,305 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:11:30,305 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:11:30,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:11:30,305 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_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e1611f006d8b4d3ca09ba5acfb7e64e93bdf2d1c3a87f0ab00b1667331afb989 [2022-11-02 21:11:30,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:11:30,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:11:30,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:11:30,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:11:30,677 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:11:30,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-02 21:11:30,762 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/data/371e83bd0/9d45eac05a1b42b4872647fb31e87f8c/FLAG6598a84aa [2022-11-02 21:11:31,272 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:11:31,272 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2022-11-02 21:11:31,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/data/371e83bd0/9d45eac05a1b42b4872647fb31e87f8c/FLAG6598a84aa [2022-11-02 21:11:31,638 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/data/371e83bd0/9d45eac05a1b42b4872647fb31e87f8c [2022-11-02 21:11:31,641 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:11:31,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:11:31,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:11:31,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:11:31,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:11:31,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:31,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9d7348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31, skipping insertion in model container [2022-11-02 21:11:31,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:31,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:11:31,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:11:31,891 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_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-02 21:11:31,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:11:31,908 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:11:31,938 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_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c[3947,3960] [2022-11-02 21:11:31,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:11:31,957 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:11:31,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31 WrapperNode [2022-11-02 21:11:31,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:11:31,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:11:31,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:11:31,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:11:31,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:31,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,006 INFO L138 Inliner]: procedures = 25, calls = 61, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 315 [2022-11-02 21:11:32,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:11:32,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:11:32,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:11:32,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:11:32,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,047 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:11:32,053 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:11:32,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:11:32,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:11:32,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (1/1) ... [2022-11-02 21:11:32,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:11:32,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:32,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:11:32,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:11:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:11:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:11:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:11:32,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:11:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 21:11:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 21:11:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 21:11:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 21:11:32,155 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-02 21:11:32,155 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-02 21:11:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:11:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 21:11:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 21:11:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:11:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:11:32,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:11:32,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:11:32,158 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 21:11:32,316 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:11:32,318 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:11:32,901 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:11:33,168 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:11:33,169 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-02 21:11:33,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:11:33 BoogieIcfgContainer [2022-11-02 21:11:33,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:11:33,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:11:33,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:11:33,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:11:33,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:11:31" (1/3) ... [2022-11-02 21:11:33,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d589ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:11:33, skipping insertion in model container [2022-11-02 21:11:33,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:11:31" (2/3) ... [2022-11-02 21:11:33,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d589ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:11:33, skipping insertion in model container [2022-11-02 21:11:33,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:11:33" (3/3) ... [2022-11-02 21:11:33,181 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2022-11-02 21:11:33,190 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:11:33,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:11:33,202 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:11:33,202 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:11:33,336 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-02 21:11:33,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 267 transitions, 558 flow [2022-11-02 21:11:33,572 INFO L130 PetriNetUnfolder]: 22/264 cut-off events. [2022-11-02 21:11:33,572 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 21:11:33,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 264 events. 22/264 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 159 event pairs, 0 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 224. Up to 3 conditions per place. [2022-11-02 21:11:33,577 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 267 transitions, 558 flow [2022-11-02 21:11:33,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 253 transitions, 524 flow [2022-11-02 21:11:33,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:11:33,605 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;@74d5d096, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:11:33,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-02 21:11:33,708 INFO L130 PetriNetUnfolder]: 22/252 cut-off events. [2022-11-02 21:11:33,709 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-02 21:11:33,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:33,710 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] [2022-11-02 21:11:33,710 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 21:11:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:33,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1623224734, now seen corresponding path program 1 times [2022-11-02 21:11:33,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:33,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438742320] [2022-11-02 21:11:33,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:33,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:34,095 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 21:11:34,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:34,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438742320] [2022-11-02 21:11:34,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438742320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:34,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:34,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:11:34,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538942166] [2022-11-02 21:11:34,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:34,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:11:34,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:34,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:11:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:11:34,152 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 267 [2022-11-02 21:11:34,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 253 transitions, 524 flow. Second operand has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:34,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:34,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 267 [2022-11-02 21:11:34,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:34,482 INFO L130 PetriNetUnfolder]: 137/624 cut-off events. [2022-11-02 21:11:34,482 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-11-02 21:11:34,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 624 events. 137/624 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2435 event pairs, 74 based on Foata normal form. 97/654 useless extension candidates. Maximal degree in co-relation 622. Up to 197 conditions per place. [2022-11-02 21:11:34,491 INFO L137 encePairwiseOnDemand]: 251/267 looper letters, 13 selfloop transitions, 0 changer transitions 8/237 dead transitions. [2022-11-02 21:11:34,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 237 transitions, 518 flow [2022-11-02 21:11:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:11:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 21:11:34,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 503 transitions. [2022-11-02 21:11:34,518 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9419475655430711 [2022-11-02 21:11:34,521 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 503 transitions. [2022-11-02 21:11:34,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 503 transitions. [2022-11-02 21:11:34,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:34,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 503 transitions. [2022-11-02 21:11:34,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 251.5) internal successors, (503), 2 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:34,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 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 21:11:34,543 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 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 21:11:34,545 INFO L175 Difference]: Start difference. First operand has 241 places, 253 transitions, 524 flow. Second operand 2 states and 503 transitions. [2022-11-02 21:11:34,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 237 transitions, 518 flow [2022-11-02 21:11:34,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 237 transitions, 506 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-02 21:11:34,560 INFO L231 Difference]: Finished difference. Result has 236 places, 229 transitions, 464 flow [2022-11-02 21:11:34,562 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=464, PETRI_PLACES=236, PETRI_TRANSITIONS=229} [2022-11-02 21:11:34,566 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -5 predicate places. [2022-11-02 21:11:34,566 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 229 transitions, 464 flow [2022-11-02 21:11:34,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.0) internal successors, (486), 2 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:34,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:34,568 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] [2022-11-02 21:11:34,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:11:34,568 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 21:11:34,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:34,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1873370169, now seen corresponding path program 1 times [2022-11-02 21:11:34,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:34,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030610745] [2022-11-02 21:11:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:34,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,365 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 21:11:35,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030610745] [2022-11-02 21:11:35,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030610745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:35,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:35,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:11:35,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478761884] [2022-11-02 21:11:35,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:35,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:11:35,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:35,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:11:35,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:11:35,381 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2022-11-02 21:11:35,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 229 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 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 21:11:35,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:35,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2022-11-02 21:11:35,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:35,558 INFO L130 PetriNetUnfolder]: 125/535 cut-off events. [2022-11-02 21:11:35,559 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-02 21:11:35,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 535 events. 125/535 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1774 event pairs, 29 based on Foata normal form. 10/511 useless extension candidates. Maximal degree in co-relation 745. Up to 142 conditions per place. [2022-11-02 21:11:35,568 INFO L137 encePairwiseOnDemand]: 264/267 looper letters, 22 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2022-11-02 21:11:35,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 236 transitions, 528 flow [2022-11-02 21:11:35,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:11:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 21:11:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-11-02 21:11:35,575 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9038701622971286 [2022-11-02 21:11:35,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-11-02 21:11:35,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-11-02 21:11:35,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:35,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-11-02 21:11:35,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 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 21:11:35,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:35,584 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:35,584 INFO L175 Difference]: Start difference. First operand has 236 places, 229 transitions, 464 flow. Second operand 3 states and 724 transitions. [2022-11-02 21:11:35,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 236 transitions, 528 flow [2022-11-02 21:11:35,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 236 transitions, 528 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 21:11:35,596 INFO L231 Difference]: Finished difference. Result has 231 places, 230 transitions, 476 flow [2022-11-02 21:11:35,596 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=476, PETRI_PLACES=231, PETRI_TRANSITIONS=230} [2022-11-02 21:11:35,597 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -10 predicate places. [2022-11-02 21:11:35,597 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 230 transitions, 476 flow [2022-11-02 21:11:35,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 238.0) internal successors, (714), 3 states have internal predecessors, (714), 0 states have call successors, (0), 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 21:11:35,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:35,598 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] [2022-11-02 21:11:35,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:11:35,599 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 21:11:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:35,600 INFO L85 PathProgramCache]: Analyzing trace with hash 942137239, now seen corresponding path program 2 times [2022-11-02 21:11:35,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:35,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305740147] [2022-11-02 21:11:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:35,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:35,871 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 21:11:35,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:35,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305740147] [2022-11-02 21:11:35,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305740147] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:35,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:35,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:11:35,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793172385] [2022-11-02 21:11:35,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:35,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:11:35,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:11:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:35,875 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 267 [2022-11-02 21:11:35,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 230 transitions, 476 flow. Second operand has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 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 21:11:35,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:35,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 267 [2022-11-02 21:11:35,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:36,202 INFO L130 PetriNetUnfolder]: 245/858 cut-off events. [2022-11-02 21:11:36,202 INFO L131 PetriNetUnfolder]: For 105/105 co-relation queries the response was YES. [2022-11-02 21:11:36,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 858 events. 245/858 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 4103 event pairs, 84 based on Foata normal form. 1/808 useless extension candidates. Maximal degree in co-relation 1454. Up to 226 conditions per place. [2022-11-02 21:11:36,209 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 57 selfloop transitions, 2 changer transitions 7/247 dead transitions. [2022-11-02 21:11:36,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 247 transitions, 654 flow [2022-11-02 21:11:36,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:11:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 21:11:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1035 transitions. [2022-11-02 21:11:36,212 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7752808988764045 [2022-11-02 21:11:36,212 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1035 transitions. [2022-11-02 21:11:36,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1035 transitions. [2022-11-02 21:11:36,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:36,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1035 transitions. [2022-11-02 21:11:36,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 207.0) internal successors, (1035), 5 states have internal predecessors, (1035), 0 states have call successors, (0), 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 21:11:36,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:36,219 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 267.0) internal successors, (1602), 6 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:36,219 INFO L175 Difference]: Start difference. First operand has 231 places, 230 transitions, 476 flow. Second operand 5 states and 1035 transitions. [2022-11-02 21:11:36,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 247 transitions, 654 flow [2022-11-02 21:11:36,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 247 transitions, 651 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:11:36,257 INFO L231 Difference]: Finished difference. Result has 237 places, 231 transitions, 490 flow [2022-11-02 21:11:36,258 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=490, PETRI_PLACES=237, PETRI_TRANSITIONS=231} [2022-11-02 21:11:36,259 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -4 predicate places. [2022-11-02 21:11:36,259 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 231 transitions, 490 flow [2022-11-02 21:11:36,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.0) internal successors, (1015), 5 states have internal predecessors, (1015), 0 states have call successors, (0), 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 21:11:36,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:36,260 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 21:11:36,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:11:36,261 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 21:11:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1159170371, now seen corresponding path program 1 times [2022-11-02 21:11:36,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:36,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315617062] [2022-11-02 21:11:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:36,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:36,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:36,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315617062] [2022-11-02 21:11:36,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315617062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:36,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:36,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:11:36,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406026509] [2022-11-02 21:11:36,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:36,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:11:36,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:36,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:11:36,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:11:36,592 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 267 [2022-11-02 21:11:36,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 231 transitions, 490 flow. Second operand has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:11:36,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:36,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 267 [2022-11-02 21:11:36,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:36,805 INFO L130 PetriNetUnfolder]: 138/568 cut-off events. [2022-11-02 21:11:36,805 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-11-02 21:11:36,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 568 events. 138/568 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1992 event pairs, 50 based on Foata normal form. 11/549 useless extension candidates. Maximal degree in co-relation 887. Up to 128 conditions per place. [2022-11-02 21:11:36,809 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 22 selfloop transitions, 4 changer transitions 3/239 dead transitions. [2022-11-02 21:11:36,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 239 transitions, 570 flow [2022-11-02 21:11:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:11:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-02 21:11:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2022-11-02 21:11:36,812 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8976279650436954 [2022-11-02 21:11:36,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2022-11-02 21:11:36,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2022-11-02 21:11:36,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:36,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2022-11-02 21:11:36,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 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 21:11:36,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:36,819 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:36,819 INFO L175 Difference]: Start difference. First operand has 237 places, 231 transitions, 490 flow. Second operand 3 states and 719 transitions. [2022-11-02 21:11:36,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 239 transitions, 570 flow [2022-11-02 21:11:36,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 239 transitions, 564 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-02 21:11:36,825 INFO L231 Difference]: Finished difference. Result has 235 places, 232 transitions, 502 flow [2022-11-02 21:11:36,826 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=502, PETRI_PLACES=235, PETRI_TRANSITIONS=232} [2022-11-02 21:11:36,827 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, -6 predicate places. [2022-11-02 21:11:36,827 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 232 transitions, 502 flow [2022-11-02 21:11:36,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 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 21:11:36,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:36,828 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 21:11:36,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:11:36,829 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 21:11:36,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:36,829 INFO L85 PathProgramCache]: Analyzing trace with hash -232857585, now seen corresponding path program 2 times [2022-11-02 21:11:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:36,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517046755] [2022-11-02 21:11:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:36,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:11:37,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:37,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517046755] [2022-11-02 21:11:37,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517046755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:37,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:37,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 21:11:37,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992695632] [2022-11-02 21:11:37,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:37,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:11:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:37,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:11:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:11:37,385 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 267 [2022-11-02 21:11:37,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 232 transitions, 502 flow. Second operand has 7 states, 7 states have (on average 201.14285714285714) internal successors, (1408), 7 states have internal predecessors, (1408), 0 states have call successors, (0), 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 21:11:37,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:37,388 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 267 [2022-11-02 21:11:37,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:37,740 INFO L130 PetriNetUnfolder]: 103/645 cut-off events. [2022-11-02 21:11:37,740 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-11-02 21:11:37,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 645 events. 103/645 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2005 event pairs, 48 based on Foata normal form. 10/623 useless extension candidates. Maximal degree in co-relation 1013. Up to 189 conditions per place. [2022-11-02 21:11:37,744 INFO L137 encePairwiseOnDemand]: 253/267 looper letters, 53 selfloop transitions, 11 changer transitions 31/270 dead transitions. [2022-11-02 21:11:37,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 270 transitions, 773 flow [2022-11-02 21:11:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:11:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:11:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2047 transitions. [2022-11-02 21:11:37,750 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2022-11-02 21:11:37,750 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2047 transitions. [2022-11-02 21:11:37,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2047 transitions. [2022-11-02 21:11:37,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:37,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2047 transitions. [2022-11-02 21:11:37,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 204.7) internal successors, (2047), 10 states have internal predecessors, (2047), 0 states have call successors, (0), 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 21:11:37,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 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 21:11:37,765 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 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 21:11:37,765 INFO L175 Difference]: Start difference. First operand has 235 places, 232 transitions, 502 flow. Second operand 10 states and 2047 transitions. [2022-11-02 21:11:37,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 270 transitions, 773 flow [2022-11-02 21:11:37,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 270 transitions, 769 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:11:37,771 INFO L231 Difference]: Finished difference. Result has 246 places, 234 transitions, 548 flow [2022-11-02 21:11:37,772 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=548, PETRI_PLACES=246, PETRI_TRANSITIONS=234} [2022-11-02 21:11:37,775 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 5 predicate places. [2022-11-02 21:11:37,775 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 234 transitions, 548 flow [2022-11-02 21:11:37,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 201.14285714285714) internal successors, (1408), 7 states have internal predecessors, (1408), 0 states have call successors, (0), 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 21:11:37,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:37,776 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 21:11:37,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:11:37,777 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 21:11:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1289779913, now seen corresponding path program 1 times [2022-11-02 21:11:37,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:37,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3368831] [2022-11-02 21:11:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:38,346 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 21:11:38,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:38,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3368831] [2022-11-02 21:11:38,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3368831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:38,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:38,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:11:38,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365042291] [2022-11-02 21:11:38,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:38,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:11:38,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:38,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:11:38,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:11:38,351 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-11-02 21:11:38,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 234 transitions, 548 flow. Second operand has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 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 21:11:38,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:38,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-11-02 21:11:38,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:38,574 INFO L130 PetriNetUnfolder]: 73/464 cut-off events. [2022-11-02 21:11:38,575 INFO L131 PetriNetUnfolder]: For 130/130 co-relation queries the response was YES. [2022-11-02 21:11:38,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824 conditions, 464 events. 73/464 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1023 event pairs, 35 based on Foata normal form. 2/447 useless extension candidates. Maximal degree in co-relation 814. Up to 108 conditions per place. [2022-11-02 21:11:38,578 INFO L137 encePairwiseOnDemand]: 259/267 looper letters, 53 selfloop transitions, 6 changer transitions 9/247 dead transitions. [2022-11-02 21:11:38,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 247 transitions, 726 flow [2022-11-02 21:11:38,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:11:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 21:11:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1457 transitions. [2022-11-02 21:11:38,582 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7795612627073302 [2022-11-02 21:11:38,582 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1457 transitions. [2022-11-02 21:11:38,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1457 transitions. [2022-11-02 21:11:38,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:38,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1457 transitions. [2022-11-02 21:11:38,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 208.14285714285714) internal successors, (1457), 7 states have internal predecessors, (1457), 0 states have call successors, (0), 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 21:11:38,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 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 21:11:38,591 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 267.0) internal successors, (2136), 8 states have internal predecessors, (2136), 0 states have call successors, (0), 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 21:11:38,591 INFO L175 Difference]: Start difference. First operand has 246 places, 234 transitions, 548 flow. Second operand 7 states and 1457 transitions. [2022-11-02 21:11:38,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 247 transitions, 726 flow [2022-11-02 21:11:38,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 247 transitions, 707 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-02 21:11:38,598 INFO L231 Difference]: Finished difference. Result has 247 places, 235 transitions, 552 flow [2022-11-02 21:11:38,598 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=247, PETRI_TRANSITIONS=235} [2022-11-02 21:11:38,599 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 6 predicate places. [2022-11-02 21:11:38,599 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 235 transitions, 552 flow [2022-11-02 21:11:38,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 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 21:11:38,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:38,601 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] [2022-11-02 21:11:38,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:11:38,601 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 21:11:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 593542449, now seen corresponding path program 1 times [2022-11-02 21:11:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:38,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416229457] [2022-11-02 21:11:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:38,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:39,037 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 21:11:39,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:39,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416229457] [2022-11-02 21:11:39,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416229457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:39,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:39,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 21:11:39,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820473133] [2022-11-02 21:11:39,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:39,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:11:39,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:39,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:11:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:11:39,042 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 267 [2022-11-02 21:11:39,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 235 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 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 21:11:39,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:39,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 267 [2022-11-02 21:11:39,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:39,306 INFO L130 PetriNetUnfolder]: 68/486 cut-off events. [2022-11-02 21:11:39,307 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2022-11-02 21:11:39,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 845 conditions, 486 events. 68/486 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 971 event pairs, 32 based on Foata normal form. 2/470 useless extension candidates. Maximal degree in co-relation 833. Up to 131 conditions per place. [2022-11-02 21:11:39,311 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 52 selfloop transitions, 8 changer transitions 19/258 dead transitions. [2022-11-02 21:11:39,311 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 258 transitions, 779 flow [2022-11-02 21:11:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:11:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 21:11:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1865 transitions. [2022-11-02 21:11:39,317 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7761131918435289 [2022-11-02 21:11:39,317 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1865 transitions. [2022-11-02 21:11:39,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1865 transitions. [2022-11-02 21:11:39,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:39,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1865 transitions. [2022-11-02 21:11:39,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 207.22222222222223) internal successors, (1865), 9 states have internal predecessors, (1865), 0 states have call successors, (0), 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 21:11:39,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 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 21:11:39,328 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 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 21:11:39,328 INFO L175 Difference]: Start difference. First operand has 247 places, 235 transitions, 552 flow. Second operand 9 states and 1865 transitions. [2022-11-02 21:11:39,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 258 transitions, 779 flow [2022-11-02 21:11:39,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 258 transitions, 761 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-02 21:11:39,335 INFO L231 Difference]: Finished difference. Result has 251 places, 236 transitions, 568 flow [2022-11-02 21:11:39,336 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=568, PETRI_PLACES=251, PETRI_TRANSITIONS=236} [2022-11-02 21:11:39,336 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 10 predicate places. [2022-11-02 21:11:39,336 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 236 transitions, 568 flow [2022-11-02 21:11:39,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 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 21:11:39,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:39,338 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] [2022-11-02 21:11:39,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 21:11:39,338 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 21:11:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash 224907029, now seen corresponding path program 1 times [2022-11-02 21:11:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:39,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892227251] [2022-11-02 21:11:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:39,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:11:40,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:40,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892227251] [2022-11-02 21:11:40,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892227251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968973587] [2022-11-02 21:11:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:40,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:40,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:40,114 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:40,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:11:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:11:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:11:41,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:41,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2022-11-02 21:11:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:11:41,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968973587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:41,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:41,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-11-02 21:11:41,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609995933] [2022-11-02 21:11:41,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:41,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 21:11:41,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 21:11:41,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2022-11-02 21:11:41,839 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 267 [2022-11-02 21:11:41,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 236 transitions, 568 flow. Second operand has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 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 21:11:41,844 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:41,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 267 [2022-11-02 21:11:41,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:42,541 INFO L130 PetriNetUnfolder]: 89/621 cut-off events. [2022-11-02 21:11:42,541 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2022-11-02 21:11:42,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 621 events. 89/621 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1587 event pairs, 34 based on Foata normal form. 8/607 useless extension candidates. Maximal degree in co-relation 1096. Up to 120 conditions per place. [2022-11-02 21:11:42,547 INFO L137 encePairwiseOnDemand]: 246/267 looper letters, 52 selfloop transitions, 22 changer transitions 46/292 dead transitions. [2022-11-02 21:11:42,547 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 292 transitions, 984 flow [2022-11-02 21:11:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 21:11:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-02 21:11:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3954 transitions. [2022-11-02 21:11:42,556 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7404494382022472 [2022-11-02 21:11:42,556 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3954 transitions. [2022-11-02 21:11:42,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3954 transitions. [2022-11-02 21:11:42,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:42,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3954 transitions. [2022-11-02 21:11:42,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 197.7) internal successors, (3954), 20 states have internal predecessors, (3954), 0 states have call successors, (0), 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 21:11:42,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 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 21:11:42,582 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 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 21:11:42,582 INFO L175 Difference]: Start difference. First operand has 251 places, 236 transitions, 568 flow. Second operand 20 states and 3954 transitions. [2022-11-02 21:11:42,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 292 transitions, 984 flow [2022-11-02 21:11:42,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 292 transitions, 954 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-11-02 21:11:42,592 INFO L231 Difference]: Finished difference. Result has 268 places, 240 transitions, 630 flow [2022-11-02 21:11:42,593 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=630, PETRI_PLACES=268, PETRI_TRANSITIONS=240} [2022-11-02 21:11:42,595 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 27 predicate places. [2022-11-02 21:11:42,595 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 240 transitions, 630 flow [2022-11-02 21:11:42,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 196.0) internal successors, (4900), 25 states have internal predecessors, (4900), 0 states have call successors, (0), 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 21:11:42,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:42,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:42,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:42,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:42,835 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 21:11:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:42,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1544296507, now seen corresponding path program 2 times [2022-11-02 21:11:42,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:42,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416124498] [2022-11-02 21:11:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:42,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 21:11:44,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:44,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416124498] [2022-11-02 21:11:44,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416124498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:44,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:44,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 21:11:44,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554470175] [2022-11-02 21:11:44,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:44,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:11:44,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:44,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:11:44,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:11:44,124 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 267 [2022-11-02 21:11:44,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 240 transitions, 630 flow. Second operand has 12 states, 12 states have (on average 185.41666666666666) internal successors, (2225), 12 states have internal predecessors, (2225), 0 states have call successors, (0), 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 21:11:44,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:44,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 267 [2022-11-02 21:11:44,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:44,957 INFO L130 PetriNetUnfolder]: 562/1439 cut-off events. [2022-11-02 21:11:44,959 INFO L131 PetriNetUnfolder]: For 974/1006 co-relation queries the response was YES. [2022-11-02 21:11:44,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3197 conditions, 1439 events. 562/1439 cut-off events. For 974/1006 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7476 event pairs, 267 based on Foata normal form. 0/1343 useless extension candidates. Maximal degree in co-relation 3179. Up to 528 conditions per place. [2022-11-02 21:11:44,974 INFO L137 encePairwiseOnDemand]: 239/267 looper letters, 68 selfloop transitions, 28 changer transitions 0/267 dead transitions. [2022-11-02 21:11:44,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 267 transitions, 916 flow [2022-11-02 21:11:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 21:11:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-02 21:11:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3694 transitions. [2022-11-02 21:11:44,984 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6917602996254681 [2022-11-02 21:11:44,984 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3694 transitions. [2022-11-02 21:11:44,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3694 transitions. [2022-11-02 21:11:44,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:44,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3694 transitions. [2022-11-02 21:11:44,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 184.7) internal successors, (3694), 20 states have internal predecessors, (3694), 0 states have call successors, (0), 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 21:11:45,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 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 21:11:45,006 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 267.0) internal successors, (5607), 21 states have internal predecessors, (5607), 0 states have call successors, (0), 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 21:11:45,006 INFO L175 Difference]: Start difference. First operand has 268 places, 240 transitions, 630 flow. Second operand 20 states and 3694 transitions. [2022-11-02 21:11:45,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 267 transitions, 916 flow [2022-11-02 21:11:45,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 267 transitions, 868 flow, removed 9 selfloop flow, removed 9 redundant places. [2022-11-02 21:11:45,017 INFO L231 Difference]: Finished difference. Result has 273 places, 243 transitions, 671 flow [2022-11-02 21:11:45,017 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=671, PETRI_PLACES=273, PETRI_TRANSITIONS=243} [2022-11-02 21:11:45,018 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 32 predicate places. [2022-11-02 21:11:45,019 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 243 transitions, 671 flow [2022-11-02 21:11:45,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 185.41666666666666) internal successors, (2225), 12 states have internal predecessors, (2225), 0 states have call successors, (0), 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 21:11:45,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:45,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:45,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 21:11:45,024 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 21:11:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash 466764871, now seen corresponding path program 3 times [2022-11-02 21:11:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:45,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211396805] [2022-11-02 21:11:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:45,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 21:11:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211396805] [2022-11-02 21:11:46,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211396805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:46,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:11:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-02 21:11:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901919377] [2022-11-02 21:11:46,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:46,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 21:11:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 21:11:46,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:11:46,156 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 267 [2022-11-02 21:11:46,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 243 transitions, 671 flow. Second operand has 13 states, 13 states have (on average 185.84615384615384) internal successors, (2416), 13 states have internal predecessors, (2416), 0 states have call successors, (0), 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 21:11:46,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:46,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 267 [2022-11-02 21:11:46,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:47,176 INFO L130 PetriNetUnfolder]: 744/1730 cut-off events. [2022-11-02 21:11:47,176 INFO L131 PetriNetUnfolder]: For 1192/1269 co-relation queries the response was YES. [2022-11-02 21:11:47,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4012 conditions, 1730 events. 744/1730 cut-off events. For 1192/1269 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9618 event pairs, 170 based on Foata normal form. 31/1690 useless extension candidates. Maximal degree in co-relation 3994. Up to 535 conditions per place. [2022-11-02 21:11:47,192 INFO L137 encePairwiseOnDemand]: 242/267 looper letters, 66 selfloop transitions, 27 changer transitions 0/266 dead transitions. [2022-11-02 21:11:47,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 266 transitions, 936 flow [2022-11-02 21:11:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 21:11:47,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-02 21:11:47,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3348 transitions. [2022-11-02 21:11:47,200 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6966292134831461 [2022-11-02 21:11:47,200 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3348 transitions. [2022-11-02 21:11:47,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3348 transitions. [2022-11-02 21:11:47,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:47,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3348 transitions. [2022-11-02 21:11:47,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 186.0) internal successors, (3348), 18 states have internal predecessors, (3348), 0 states have call successors, (0), 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 21:11:47,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 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 21:11:47,219 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 267.0) internal successors, (5073), 19 states have internal predecessors, (5073), 0 states have call successors, (0), 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 21:11:47,219 INFO L175 Difference]: Start difference. First operand has 273 places, 243 transitions, 671 flow. Second operand 18 states and 3348 transitions. [2022-11-02 21:11:47,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 266 transitions, 936 flow [2022-11-02 21:11:47,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 266 transitions, 887 flow, removed 2 selfloop flow, removed 16 redundant places. [2022-11-02 21:11:47,226 INFO L231 Difference]: Finished difference. Result has 275 places, 245 transitions, 700 flow [2022-11-02 21:11:47,227 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=700, PETRI_PLACES=275, PETRI_TRANSITIONS=245} [2022-11-02 21:11:47,228 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 34 predicate places. [2022-11-02 21:11:47,228 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 245 transitions, 700 flow [2022-11-02 21:11:47,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 185.84615384615384) internal successors, (2416), 13 states have internal predecessors, (2416), 0 states have call successors, (0), 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 21:11:47,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:47,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:47,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 21:11:47,230 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 21:11:47,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash -104731415, now seen corresponding path program 1 times [2022-11-02 21:11:47,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:47,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521016211] [2022-11-02 21:11:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:47,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:11:48,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:48,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521016211] [2022-11-02 21:11:48,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521016211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:48,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522343305] [2022-11-02 21:11:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:48,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:48,128 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:48,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:11:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:48,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-02 21:11:48,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:11:49,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:11:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:11:49,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522343305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:11:49,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:11:49,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 11] total 29 [2022-11-02 21:11:49,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858981551] [2022-11-02 21:11:49,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:11:49,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 21:11:49,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 21:11:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:11:49,865 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 267 [2022-11-02 21:11:49,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 245 transitions, 700 flow. Second operand has 29 states, 29 states have (on average 163.6551724137931) internal successors, (4746), 29 states have internal predecessors, (4746), 0 states have call successors, (0), 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 21:11:49,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:49,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 267 [2022-11-02 21:11:49,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:52,226 INFO L130 PetriNetUnfolder]: 314/1341 cut-off events. [2022-11-02 21:11:52,226 INFO L131 PetriNetUnfolder]: For 1547/1547 co-relation queries the response was YES. [2022-11-02 21:11:52,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3207 conditions, 1341 events. 314/1341 cut-off events. For 1547/1547 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6617 event pairs, 121 based on Foata normal form. 15/1303 useless extension candidates. Maximal degree in co-relation 3188. Up to 184 conditions per place. [2022-11-02 21:11:52,239 INFO L137 encePairwiseOnDemand]: 225/267 looper letters, 88 selfloop transitions, 58 changer transitions 50/343 dead transitions. [2022-11-02 21:11:52,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 343 transitions, 1474 flow [2022-11-02 21:11:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-02 21:11:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-02 21:11:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 9033 transitions. [2022-11-02 21:11:52,258 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6041332263242376 [2022-11-02 21:11:52,258 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 9033 transitions. [2022-11-02 21:11:52,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 9033 transitions. [2022-11-02 21:11:52,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:52,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 9033 transitions. [2022-11-02 21:11:52,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 161.30357142857142) internal successors, (9033), 56 states have internal predecessors, (9033), 0 states have call successors, (0), 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 21:11:52,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 267.0) internal successors, (15219), 57 states have internal predecessors, (15219), 0 states have call successors, (0), 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 21:11:52,315 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 267.0) internal successors, (15219), 57 states have internal predecessors, (15219), 0 states have call successors, (0), 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 21:11:52,315 INFO L175 Difference]: Start difference. First operand has 275 places, 245 transitions, 700 flow. Second operand 56 states and 9033 transitions. [2022-11-02 21:11:52,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 343 transitions, 1474 flow [2022-11-02 21:11:52,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 343 transitions, 1404 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-02 21:11:52,325 INFO L231 Difference]: Finished difference. Result has 319 places, 257 transitions, 814 flow [2022-11-02 21:11:52,325 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=814, PETRI_PLACES=319, PETRI_TRANSITIONS=257} [2022-11-02 21:11:52,326 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 78 predicate places. [2022-11-02 21:11:52,326 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 257 transitions, 814 flow [2022-11-02 21:11:52,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 163.6551724137931) internal successors, (4746), 29 states have internal predecessors, (4746), 0 states have call successors, (0), 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 21:11:52,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:52,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:52,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:52,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:11:52,543 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 21:11:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:52,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1721300875, now seen corresponding path program 2 times [2022-11-02 21:11:52,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:52,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841469908] [2022-11-02 21:11:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:52,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:11:52,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:52,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841469908] [2022-11-02 21:11:52,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841469908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:52,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99113879] [2022-11-02 21:11:52,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:11:52,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:52,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:52,972 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:52,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:11:53,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:11:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:53,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:11:53,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:11:53,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:11:53,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99113879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:53,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:11:53,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-02 21:11:53,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116035024] [2022-11-02 21:11:53,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:53,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 21:11:53,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:53,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 21:11:53,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:11:53,312 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 267 [2022-11-02 21:11:53,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 257 transitions, 814 flow. Second operand has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 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 21:11:53,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:53,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 267 [2022-11-02 21:11:53,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:11:53,757 INFO L130 PetriNetUnfolder]: 359/1551 cut-off events. [2022-11-02 21:11:53,757 INFO L131 PetriNetUnfolder]: For 1934/1936 co-relation queries the response was YES. [2022-11-02 21:11:53,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3535 conditions, 1551 events. 359/1551 cut-off events. For 1934/1936 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9061 event pairs, 48 based on Foata normal form. 44/1527 useless extension candidates. Maximal degree in co-relation 3513. Up to 239 conditions per place. [2022-11-02 21:11:53,775 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 37 selfloop transitions, 11 changer transitions 0/280 dead transitions. [2022-11-02 21:11:53,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 280 transitions, 1032 flow [2022-11-02 21:11:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 21:11:53,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-02 21:11:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 971 transitions. [2022-11-02 21:11:53,778 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9091760299625468 [2022-11-02 21:11:53,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 971 transitions. [2022-11-02 21:11:53,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 971 transitions. [2022-11-02 21:11:53,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:11:53,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 971 transitions. [2022-11-02 21:11:53,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.75) internal successors, (971), 4 states have internal predecessors, (971), 0 states have call successors, (0), 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 21:11:53,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:53,783 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:11:53,783 INFO L175 Difference]: Start difference. First operand has 319 places, 257 transitions, 814 flow. Second operand 4 states and 971 transitions. [2022-11-02 21:11:53,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 280 transitions, 1032 flow [2022-11-02 21:11:53,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 280 transitions, 926 flow, removed 16 selfloop flow, removed 26 redundant places. [2022-11-02 21:11:53,792 INFO L231 Difference]: Finished difference. Result has 280 places, 264 transitions, 831 flow [2022-11-02 21:11:53,792 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=720, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=831, PETRI_PLACES=280, PETRI_TRANSITIONS=264} [2022-11-02 21:11:53,793 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 39 predicate places. [2022-11-02 21:11:53,793 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 264 transitions, 831 flow [2022-11-02 21:11:53,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 237.75) internal successors, (951), 4 states have internal predecessors, (951), 0 states have call successors, (0), 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 21:11:53,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:11:53,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:53,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:11:54,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 21:11:54,008 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 21:11:54,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:11:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2020210051, now seen corresponding path program 3 times [2022-11-02 21:11:54,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:11:54,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582441559] [2022-11-02 21:11:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:11:54,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:11:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:11:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:11:58,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:11:58,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582441559] [2022-11-02 21:11:58,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582441559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:11:58,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440270331] [2022-11-02 21:11:58,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:11:58,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:11:58,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:11:58,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:11:58,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:11:58,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:11:58,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:11:58,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 21:11:58,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:11:59,500 INFO L356 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2022-11-02 21:11:59,501 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 47 treesize of output 32 [2022-11-02 21:11:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 21:11:59,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:11:59,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440270331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:11:59,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:11:59,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [40] total 47 [2022-11-02 21:11:59,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949612571] [2022-11-02 21:11:59,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:11:59,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:11:59,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:11:59,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:11:59,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2019, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 21:11:59,578 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 267 [2022-11-02 21:11:59,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 264 transitions, 831 flow. Second operand has 9 states, 9 states have (on average 210.11111111111111) internal successors, (1891), 9 states have internal predecessors, (1891), 0 states have call successors, (0), 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 21:11:59,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:11:59,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 267 [2022-11-02 21:11:59,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:12:03,405 INFO L130 PetriNetUnfolder]: 6403/12092 cut-off events. [2022-11-02 21:12:03,405 INFO L131 PetriNetUnfolder]: For 21434/23746 co-relation queries the response was YES. [2022-11-02 21:12:03,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32572 conditions, 12092 events. 6403/12092 cut-off events. For 21434/23746 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 94041 event pairs, 3832 based on Foata normal form. 0/10432 useless extension candidates. Maximal degree in co-relation 32553. Up to 8821 conditions per place. [2022-11-02 21:12:03,527 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 92 selfloop transitions, 18 changer transitions 0/312 dead transitions. [2022-11-02 21:12:03,528 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 312 transitions, 1231 flow [2022-11-02 21:12:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:12:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 21:12:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1936 transitions. [2022-11-02 21:12:03,532 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8056595921764461 [2022-11-02 21:12:03,532 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1936 transitions. [2022-11-02 21:12:03,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1936 transitions. [2022-11-02 21:12:03,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:12:03,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1936 transitions. [2022-11-02 21:12:03,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 215.11111111111111) internal successors, (1936), 9 states have internal predecessors, (1936), 0 states have call successors, (0), 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 21:12:03,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 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 21:12:03,542 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 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 21:12:03,542 INFO L175 Difference]: Start difference. First operand has 280 places, 264 transitions, 831 flow. Second operand 9 states and 1936 transitions. [2022-11-02 21:12:03,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 312 transitions, 1231 flow [2022-11-02 21:12:03,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 312 transitions, 1195 flow, removed 18 selfloop flow, removed 0 redundant places. [2022-11-02 21:12:03,561 INFO L231 Difference]: Finished difference. Result has 291 places, 278 transitions, 931 flow [2022-11-02 21:12:03,562 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=931, PETRI_PLACES=291, PETRI_TRANSITIONS=278} [2022-11-02 21:12:03,562 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 50 predicate places. [2022-11-02 21:12:03,563 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 278 transitions, 931 flow [2022-11-02 21:12:03,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 210.11111111111111) internal successors, (1891), 9 states have internal predecessors, (1891), 0 states have call successors, (0), 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 21:12:03,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:12:03,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:03,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-02 21:12:03,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 21:12:03,771 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 21:12:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:12:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash 332524653, now seen corresponding path program 4 times [2022-11-02 21:12:03,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:12:03,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406002870] [2022-11-02 21:12:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:12:03,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:12:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:12:06,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:12:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406002870] [2022-11-02 21:12:06,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406002870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146695053] [2022-11-02 21:12:06,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:12:06,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:06,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:12:06,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:12:06,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:12:06,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:12:06,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:12:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-02 21:12:06,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:12:10,666 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:12:10,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:12:11,793 INFO L356 Elim1Store]: treesize reduction 28, result has 82.8 percent of original size [2022-11-02 21:12:11,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 152 [2022-11-02 21:12:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:12:15,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146695053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:12:15,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:12:15,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 30, 29] total 76 [2022-11-02 21:12:15,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19226511] [2022-11-02 21:12:15,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:12:15,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-02 21:12:15,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:12:15,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-02 21:12:15,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=5142, Unknown=0, NotChecked=0, Total=5700 [2022-11-02 21:12:15,485 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 267 [2022-11-02 21:12:15,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 278 transitions, 931 flow. Second operand has 76 states, 76 states have (on average 119.80263157894737) internal successors, (9105), 76 states have internal predecessors, (9105), 0 states have call successors, (0), 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 21:12:15,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:12:15,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 267 [2022-11-02 21:12:15,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:12:30,915 INFO L130 PetriNetUnfolder]: 11685/25500 cut-off events. [2022-11-02 21:12:30,915 INFO L131 PetriNetUnfolder]: For 37376/37590 co-relation queries the response was YES. [2022-11-02 21:12:31,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67052 conditions, 25500 events. 11685/25500 cut-off events. For 37376/37590 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 243637 event pairs, 2558 based on Foata normal form. 60/23706 useless extension candidates. Maximal degree in co-relation 67029. Up to 11289 conditions per place. [2022-11-02 21:12:31,192 INFO L137 encePairwiseOnDemand]: 206/267 looper letters, 413 selfloop transitions, 313 changer transitions 1/831 dead transitions. [2022-11-02 21:12:31,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 831 transitions, 4859 flow [2022-11-02 21:12:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-11-02 21:12:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2022-11-02 21:12:31,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 13923 transitions. [2022-11-02 21:12:31,237 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.4495350639287098 [2022-11-02 21:12:31,238 INFO L72 ComplementDD]: Start complementDD. Operand 116 states and 13923 transitions. [2022-11-02 21:12:31,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 116 states and 13923 transitions. [2022-11-02 21:12:31,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:12:31,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 116 states and 13923 transitions. [2022-11-02 21:12:31,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 117 states, 116 states have (on average 120.02586206896552) internal successors, (13923), 116 states have internal predecessors, (13923), 0 states have call successors, (0), 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 21:12:31,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 117 states, 117 states have (on average 267.0) internal successors, (31239), 117 states have internal predecessors, (31239), 0 states have call successors, (0), 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 21:12:31,351 INFO L81 ComplementDD]: Finished complementDD. Result has 117 states, 117 states have (on average 267.0) internal successors, (31239), 117 states have internal predecessors, (31239), 0 states have call successors, (0), 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 21:12:31,351 INFO L175 Difference]: Start difference. First operand has 291 places, 278 transitions, 931 flow. Second operand 116 states and 13923 transitions. [2022-11-02 21:12:31,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 831 transitions, 4859 flow [2022-11-02 21:12:31,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 831 transitions, 4819 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-02 21:12:31,443 INFO L231 Difference]: Finished difference. Result has 438 places, 572 transitions, 3741 flow [2022-11-02 21:12:31,444 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=116, PETRI_FLOW=3741, PETRI_PLACES=438, PETRI_TRANSITIONS=572} [2022-11-02 21:12:31,445 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 197 predicate places. [2022-11-02 21:12:31,446 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 572 transitions, 3741 flow [2022-11-02 21:12:31,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 119.80263157894737) internal successors, (9105), 76 states have internal predecessors, (9105), 0 states have call successors, (0), 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 21:12:31,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:12:31,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:31,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:12:31,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 21:12:31,667 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 21:12:31,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:12:31,667 INFO L85 PathProgramCache]: Analyzing trace with hash -769160245, now seen corresponding path program 5 times [2022-11-02 21:12:31,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:12:31,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539513536] [2022-11-02 21:12:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:12:31,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:12:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:12:35,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:12:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539513536] [2022-11-02 21:12:35,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539513536] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:35,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039446150] [2022-11-02 21:12:35,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:12:35,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:35,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:12:35,939 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:12:35,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:12:36,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 21:12:36,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:12:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 21:12:36,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:12:36,955 INFO L356 Elim1Store]: treesize reduction 78, result has 25.7 percent of original size [2022-11-02 21:12:36,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 38 [2022-11-02 21:12:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:12:37,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:12:37,763 INFO L356 Elim1Store]: treesize reduction 4, result has 96.0 percent of original size [2022-11-02 21:12:37,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-11-02 21:12:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:12:38,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039446150] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:12:38,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:12:38,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 8, 9] total 51 [2022-11-02 21:12:38,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528813160] [2022-11-02 21:12:38,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:12:38,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-02 21:12:38,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:12:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-02 21:12:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2384, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 21:12:38,722 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 267 [2022-11-02 21:12:38,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 572 transitions, 3741 flow. Second operand has 51 states, 51 states have (on average 152.37254901960785) internal successors, (7771), 51 states have internal predecessors, (7771), 0 states have call successors, (0), 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 21:12:38,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:12:38,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 267 [2022-11-02 21:12:38,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:12:56,243 INFO L130 PetriNetUnfolder]: 15719/34295 cut-off events. [2022-11-02 21:12:56,243 INFO L131 PetriNetUnfolder]: For 121405/123375 co-relation queries the response was YES. [2022-11-02 21:12:56,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117234 conditions, 34295 events. 15719/34295 cut-off events. For 121405/123375 co-relation queries the response was YES. Maximal size of possible extension queue 1190. Compared 342983 event pairs, 3328 based on Foata normal form. 722/32605 useless extension candidates. Maximal degree in co-relation 117177. Up to 12080 conditions per place. [2022-11-02 21:12:56,759 INFO L137 encePairwiseOnDemand]: 215/267 looper letters, 420 selfloop transitions, 228 changer transitions 0/777 dead transitions. [2022-11-02 21:12:56,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 777 transitions, 6435 flow [2022-11-02 21:12:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-02 21:12:56,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-11-02 21:12:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 11576 transitions. [2022-11-02 21:12:56,777 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5704711216242855 [2022-11-02 21:12:56,777 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 11576 transitions. [2022-11-02 21:12:56,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 11576 transitions. [2022-11-02 21:12:56,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:12:56,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 11576 transitions. [2022-11-02 21:12:56,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 152.31578947368422) internal successors, (11576), 76 states have internal predecessors, (11576), 0 states have call successors, (0), 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 21:12:56,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 267.0) internal successors, (20559), 77 states have internal predecessors, (20559), 0 states have call successors, (0), 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 21:12:56,829 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 267.0) internal successors, (20559), 77 states have internal predecessors, (20559), 0 states have call successors, (0), 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 21:12:56,829 INFO L175 Difference]: Start difference. First operand has 438 places, 572 transitions, 3741 flow. Second operand 76 states and 11576 transitions. [2022-11-02 21:12:56,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 777 transitions, 6435 flow [2022-11-02 21:12:57,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 777 transitions, 6202 flow, removed 75 selfloop flow, removed 27 redundant places. [2022-11-02 21:12:57,447 INFO L231 Difference]: Finished difference. Result has 497 places, 613 transitions, 4807 flow [2022-11-02 21:12:57,448 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=3269, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=4807, PETRI_PLACES=497, PETRI_TRANSITIONS=613} [2022-11-02 21:12:57,448 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 256 predicate places. [2022-11-02 21:12:57,448 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 613 transitions, 4807 flow [2022-11-02 21:12:57,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 152.37254901960785) internal successors, (7771), 51 states have internal predecessors, (7771), 0 states have call successors, (0), 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 21:12:57,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:12:57,450 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:57,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:12:57,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:57,659 INFO L420 AbstractCegarLoop]: === Iteration 16 === 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 21:12:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:12:57,659 INFO L85 PathProgramCache]: Analyzing trace with hash -315464661, now seen corresponding path program 6 times [2022-11-02 21:12:57,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:12:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986079203] [2022-11-02 21:12:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:12:57,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:12:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:12:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:12:58,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:12:58,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986079203] [2022-11-02 21:12:58,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986079203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:12:58,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20159098] [2022-11-02 21:12:58,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:12:58,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:12:58,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:12:58,800 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:12:58,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:12:59,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 21:12:59,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:12:59,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-02 21:12:59,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:13:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:13:00,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:13:01,602 INFO L356 Elim1Store]: treesize reduction 4, result has 96.0 percent of original size [2022-11-02 21:13:01,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-11-02 21:13:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-02 21:13:02,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20159098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:13:02,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:13:02,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 25, 10] total 40 [2022-11-02 21:13:02,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877446809] [2022-11-02 21:13:02,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:13:02,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-02 21:13:02,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:13:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-02 21:13:02,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 21:13:02,838 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 267 [2022-11-02 21:13:02,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 613 transitions, 4807 flow. Second operand has 40 states, 40 states have (on average 170.75) internal successors, (6830), 40 states have internal predecessors, (6830), 0 states have call successors, (0), 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 21:13:02,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:13:02,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 267 [2022-11-02 21:13:02,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:13:17,472 INFO L130 PetriNetUnfolder]: 18965/41674 cut-off events. [2022-11-02 21:13:17,472 INFO L131 PetriNetUnfolder]: For 184130/186392 co-relation queries the response was YES. [2022-11-02 21:13:17,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152556 conditions, 41674 events. 18965/41674 cut-off events. For 184130/186392 co-relation queries the response was YES. Maximal size of possible extension queue 1369. Compared 432596 event pairs, 4012 based on Foata normal form. 270/39330 useless extension candidates. Maximal degree in co-relation 152488. Up to 22688 conditions per place. [2022-11-02 21:13:18,155 INFO L137 encePairwiseOnDemand]: 225/267 looper letters, 537 selfloop transitions, 328 changer transitions 0/1028 dead transitions. [2022-11-02 21:13:18,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 1028 transitions, 9808 flow [2022-11-02 21:13:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-02 21:13:18,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-02 21:13:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 11008 transitions. [2022-11-02 21:13:18,176 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6441947565543071 [2022-11-02 21:13:18,176 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 11008 transitions. [2022-11-02 21:13:18,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 11008 transitions. [2022-11-02 21:13:18,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:13:18,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 11008 transitions. [2022-11-02 21:13:18,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 172.0) internal successors, (11008), 64 states have internal predecessors, (11008), 0 states have call successors, (0), 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 21:13:18,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 267.0) internal successors, (17355), 65 states have internal predecessors, (17355), 0 states have call successors, (0), 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 21:13:18,225 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 267.0) internal successors, (17355), 65 states have internal predecessors, (17355), 0 states have call successors, (0), 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 21:13:18,226 INFO L175 Difference]: Start difference. First operand has 497 places, 613 transitions, 4807 flow. Second operand 64 states and 11008 transitions. [2022-11-02 21:13:18,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 1028 transitions, 9808 flow [2022-11-02 21:13:19,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1028 transitions, 9524 flow, removed 59 selfloop flow, removed 48 redundant places. [2022-11-02 21:13:19,076 INFO L231 Difference]: Finished difference. Result has 520 places, 820 transitions, 7356 flow [2022-11-02 21:13:19,077 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=4566, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=7356, PETRI_PLACES=520, PETRI_TRANSITIONS=820} [2022-11-02 21:13:19,077 INFO L287 CegarLoopForPetriNet]: 241 programPoint places, 279 predicate places. [2022-11-02 21:13:19,077 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 820 transitions, 7356 flow [2022-11-02 21:13:19,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 170.75) internal successors, (6830), 40 states have internal predecessors, (6830), 0 states have call successors, (0), 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 21:13:19,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:13:19,079 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:19,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:13:19,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 21:13:19,286 INFO L420 AbstractCegarLoop]: === Iteration 17 === 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 21:13:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:13:19,286 INFO L85 PathProgramCache]: Analyzing trace with hash -643657733, now seen corresponding path program 7 times [2022-11-02 21:13:19,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:13:19,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57597968] [2022-11-02 21:13:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:13:19,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:13:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:13:23,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:13:23,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57597968] [2022-11-02 21:13:23,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57597968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:13:23,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114493223] [2022-11-02 21:13:23,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:13:23,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:13:23,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:13:23,154 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:13:23,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0715826-33d3-43a3-9f0f-97cafaf4f7a1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:13:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:13:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-02 21:13:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:13:26,349 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-11-02 21:13:26,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 36 [2022-11-02 21:13:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:13:26,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:13:27,167 INFO L356 Elim1Store]: treesize reduction 4, result has 96.0 percent of original size [2022-11-02 21:13:27,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 110 [2022-11-02 21:13:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:13:29,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114493223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:13:29,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:13:29,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 30, 18] total 79 [2022-11-02 21:13:29,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080343695] [2022-11-02 21:13:29,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:13:29,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-02 21:13:29,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:13:29,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-02 21:13:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=5696, Unknown=0, NotChecked=0, Total=6162 [2022-11-02 21:13:29,499 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 267 [2022-11-02 21:13:29,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 820 transitions, 7356 flow. Second operand has 79 states, 79 states have (on average 118.62025316455696) internal successors, (9371), 79 states have internal predecessors, (9371), 0 states have call successors, (0), 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 21:13:29,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:13:29,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 267 [2022-11-02 21:13:29,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand