./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.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_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/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_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/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_d49b2c60-0985-4fd7-a3a4-427c07172b27/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 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- 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 21:07:01,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:07:01,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:07:01,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:07:01,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:07:01,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:07:01,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:07:01,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:07:01,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:07:01,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:07:01,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:07:01,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:07:01,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:07:01,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:07:01,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:07:01,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:07:01,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:07:01,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:07:01,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:07:01,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:07:01,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:07:01,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:07:01,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:07:01,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:07:01,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:07:01,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:07:01,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:07:01,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:07:01,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:07:01,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:07:01,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:07:01,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:07:01,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:07:01,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:07:01,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:07:01,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:07:01,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:07:01,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:07:01,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:07:01,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:07:01,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:07:01,315 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:07:01,337 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:07:01,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:07:01,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:07:01,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:07:01,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:07:01,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:07:01,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:07:01,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:07:01,341 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:07:01,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:07:01,341 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:07:01,342 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:07:01,342 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:07:01,342 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:07:01,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:07:01,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:07:01,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:07:01,343 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:07:01,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:07:01,344 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:07:01,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:07:01,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:07:01,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:07:01,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:07:01,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:07:01,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:07:01,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:07:01,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:07:01,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:07:01,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:07:01,347 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:07:01,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:07:01,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:07:01,348 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_d49b2c60-0985-4fd7-a3a4-427c07172b27/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-11-02 21:07:01,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:07:01,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:07:01,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:07:01,648 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:07:01,649 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:07:01,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-02 21:07:01,754 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/data/63bae5c91/965133a00417417d818b4cc91176d995/FLAG694527f61 [2022-11-02 21:07:02,363 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:07:02,364 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-02 21:07:02,374 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/data/63bae5c91/965133a00417417d818b4cc91176d995/FLAG694527f61 [2022-11-02 21:07:02,680 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/data/63bae5c91/965133a00417417d818b4cc91176d995 [2022-11-02 21:07:02,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:07:02,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:07:02,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:07:02,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:07:02,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:07:02,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:07:02" (1/1) ... [2022-11-02 21:07:02,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c030aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:02, skipping insertion in model container [2022-11-02 21:07:02,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:07:02" (1/1) ... [2022-11-02 21:07:02,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:07:02,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:07:02,977 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_d49b2c60-0985-4fd7-a3a4-427c07172b27/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-02 21:07:02,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:07:03,003 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:07:03,027 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_d49b2c60-0985-4fd7-a3a4-427c07172b27/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-02 21:07:03,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:07:03,046 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:07:03,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03 WrapperNode [2022-11-02 21:07:03,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:07:03,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:07:03,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:07:03,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:07:03,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,109 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 193 [2022-11-02 21:07:03,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:07:03,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:07:03,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:07:03,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:07:03,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,138 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,145 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:07:03,146 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:07:03,146 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:07:03,146 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:07:03,147 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (1/1) ... [2022-11-02 21:07:03,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:07:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:03,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:07:03,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:07:03,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:07:03,216 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 21:07:03,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 21:07:03,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 21:07:03,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 21:07:03,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:07:03,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:07:03,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:07:03,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 21:07:03,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 21:07:03,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 21:07:03,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:07:03,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:07:03,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:07:03,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:07:03,220 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 21:07:03,333 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:07:03,336 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:07:03,891 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:07:04,155 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:07:04,156 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 21:07:04,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:07:04 BoogieIcfgContainer [2022-11-02 21:07:04,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:07:04,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:07:04,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:07:04,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:07:04,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:07:02" (1/3) ... [2022-11-02 21:07:04,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a4d55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:07:04, skipping insertion in model container [2022-11-02 21:07:04,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:03" (2/3) ... [2022-11-02 21:07:04,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51a4d55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:07:04, skipping insertion in model container [2022-11-02 21:07:04,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:07:04" (3/3) ... [2022-11-02 21:07:04,172 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-11-02 21:07:04,191 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 21:07:04,213 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:07:04,214 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:07:04,214 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 21:07:04,350 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 21:07:04,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 165 transitions, 346 flow [2022-11-02 21:07:04,498 INFO L130 PetriNetUnfolder]: 13/163 cut-off events. [2022-11-02 21:07:04,498 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 21:07:04,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 82 event pairs, 0 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 128. Up to 2 conditions per place. [2022-11-02 21:07:04,502 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 165 transitions, 346 flow [2022-11-02 21:07:04,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 154 transitions, 320 flow [2022-11-02 21:07:04,520 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:07:04,527 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;@29229ba6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:07:04,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 21:07:04,568 INFO L130 PetriNetUnfolder]: 13/153 cut-off events. [2022-11-02 21:07:04,568 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 21:07:04,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:04,569 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] [2022-11-02 21:07:04,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:04,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:04,576 INFO L85 PathProgramCache]: Analyzing trace with hash -971864850, now seen corresponding path program 1 times [2022-11-02 21:07:04,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:04,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441637484] [2022-11-02 21:07:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:04,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:05,531 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 21:07:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:05,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441637484] [2022-11-02 21:07:05,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441637484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:05,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:05,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:07:05,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323697812] [2022-11-02 21:07:05,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:05,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:07:05,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:05,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:07:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:07:05,619 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 165 [2022-11-02 21:07:05,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 154 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:05,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:05,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 165 [2022-11-02 21:07:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:05,893 INFO L130 PetriNetUnfolder]: 14/195 cut-off events. [2022-11-02 21:07:05,893 INFO L131 PetriNetUnfolder]: For 24/24 co-relation queries the response was YES. [2022-11-02 21:07:05,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 195 events. 14/195 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 245 event pairs, 0 based on Foata normal form. 20/202 useless extension candidates. Maximal degree in co-relation 150. Up to 23 conditions per place. [2022-11-02 21:07:05,898 INFO L137 encePairwiseOnDemand]: 145/165 looper letters, 28 selfloop transitions, 3 changer transitions 10/154 dead transitions. [2022-11-02 21:07:05,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 411 flow [2022-11-02 21:07:05,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:07:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 21:07:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 915 transitions. [2022-11-02 21:07:05,930 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7922077922077922 [2022-11-02 21:07:05,932 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 915 transitions. [2022-11-02 21:07:05,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 915 transitions. [2022-11-02 21:07:05,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:05,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 915 transitions. [2022-11-02 21:07:05,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.71428571428572) internal successors, (915), 7 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:05,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:05,961 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:05,964 INFO L175 Difference]: Start difference. First operand has 148 places, 154 transitions, 320 flow. Second operand 7 states and 915 transitions. [2022-11-02 21:07:05,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 411 flow [2022-11-02 21:07:05,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 154 transitions, 397 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 21:07:05,978 INFO L231 Difference]: Finished difference. Result has 153 places, 142 transitions, 307 flow [2022-11-02 21:07:05,981 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=307, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2022-11-02 21:07:05,986 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 5 predicate places. [2022-11-02 21:07:05,987 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 307 flow [2022-11-02 21:07:05,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:05,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:05,988 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] [2022-11-02 21:07:05,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:07:05,989 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:05,991 INFO L85 PathProgramCache]: Analyzing trace with hash 202378132, now seen corresponding path program 1 times [2022-11-02 21:07:05,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:05,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834780219] [2022-11-02 21:07:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:05,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:06,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:06,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834780219] [2022-11-02 21:07:06,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834780219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:06,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588491240] [2022-11-02 21:07:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:06,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:06,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:06,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:06,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:07:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:06,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:07:06,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:07,121 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 21:07:07,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:07:07,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588491240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:07,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:07:07,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2022-11-02 21:07:07,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146099548] [2022-11-02 21:07:07,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:07,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:07:07,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:07:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:07:07,137 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 165 [2022-11-02 21:07:07,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:07,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:07,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 165 [2022-11-02 21:07:07,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:07,458 INFO L130 PetriNetUnfolder]: 15/265 cut-off events. [2022-11-02 21:07:07,459 INFO L131 PetriNetUnfolder]: For 28/31 co-relation queries the response was YES. [2022-11-02 21:07:07,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369 conditions, 265 events. 15/265 cut-off events. For 28/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 496 event pairs, 2 based on Foata normal form. 4/253 useless extension candidates. Maximal degree in co-relation 359. Up to 37 conditions per place. [2022-11-02 21:07:07,461 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 31 selfloop transitions, 9 changer transitions 17/163 dead transitions. [2022-11-02 21:07:07,461 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 163 transitions, 467 flow [2022-11-02 21:07:07,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:07:07,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-02 21:07:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1267 transitions. [2022-11-02 21:07:07,465 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7678787878787878 [2022-11-02 21:07:07,466 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1267 transitions. [2022-11-02 21:07:07,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1267 transitions. [2022-11-02 21:07:07,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:07,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1267 transitions. [2022-11-02 21:07:07,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.7) internal successors, (1267), 10 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:07,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:07,476 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:07,476 INFO L175 Difference]: Start difference. First operand has 153 places, 142 transitions, 307 flow. Second operand 10 states and 1267 transitions. [2022-11-02 21:07:07,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 163 transitions, 467 flow [2022-11-02 21:07:07,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 163 transitions, 460 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-02 21:07:07,482 INFO L231 Difference]: Finished difference. Result has 152 places, 143 transitions, 332 flow [2022-11-02 21:07:07,482 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=332, PETRI_PLACES=152, PETRI_TRANSITIONS=143} [2022-11-02 21:07:07,483 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 4 predicate places. [2022-11-02 21:07:07,484 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 143 transitions, 332 flow [2022-11-02 21:07:07,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 124.57142857142857) internal successors, (872), 7 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:07,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:07,485 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] [2022-11-02 21:07:07,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:07,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:07,699 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:07,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:07,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1365819469, now seen corresponding path program 1 times [2022-11-02 21:07:07,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:07,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799175253] [2022-11-02 21:07:07,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:07,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,851 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 21:07:07,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:07,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799175253] [2022-11-02 21:07:07,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799175253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:07,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:07,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:07:07,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867896609] [2022-11-02 21:07:07,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:07,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:07:07,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:07,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:07:07,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:07:07,856 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:07,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 143 transitions, 332 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:07,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:07,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:07,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:08,030 INFO L130 PetriNetUnfolder]: 127/451 cut-off events. [2022-11-02 21:07:08,030 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-02 21:07:08,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 451 events. 127/451 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1778 event pairs, 35 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 703. Up to 115 conditions per place. [2022-11-02 21:07:08,035 INFO L137 encePairwiseOnDemand]: 159/165 looper letters, 46 selfloop transitions, 6 changer transitions 0/175 dead transitions. [2022-11-02 21:07:08,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 175 transitions, 530 flow [2022-11-02 21:07:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:07:08,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-02 21:07:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 732 transitions. [2022-11-02 21:07:08,038 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8872727272727273 [2022-11-02 21:07:08,038 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 732 transitions. [2022-11-02 21:07:08,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 732 transitions. [2022-11-02 21:07:08,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:08,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 732 transitions. [2022-11-02 21:07:08,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:08,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:08,043 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 165.0) internal successors, (990), 6 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:08,044 INFO L175 Difference]: Start difference. First operand has 152 places, 143 transitions, 332 flow. Second operand 5 states and 732 transitions. [2022-11-02 21:07:08,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 175 transitions, 530 flow [2022-11-02 21:07:08,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 175 transitions, 514 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-02 21:07:08,049 INFO L231 Difference]: Finished difference. Result has 151 places, 148 transitions, 357 flow [2022-11-02 21:07:08,050 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=357, PETRI_PLACES=151, PETRI_TRANSITIONS=148} [2022-11-02 21:07:08,050 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 3 predicate places. [2022-11-02 21:07:08,051 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 148 transitions, 357 flow [2022-11-02 21:07:08,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:08,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:08,052 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] [2022-11-02 21:07:08,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:07:08,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:08,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1565113527, now seen corresponding path program 2 times [2022-11-02 21:07:08,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:08,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373365454] [2022-11-02 21:07:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:08,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:08,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:08,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373365454] [2022-11-02 21:07:08,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373365454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:08,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235311018] [2022-11-02 21:07:08,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:07:08,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:08,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:08,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:08,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:07:08,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:07:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:08,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:07:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:08,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:08,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235311018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:08,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:08,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-02 21:07:08,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550478117] [2022-11-02 21:07:08,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:08,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:07:08,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:08,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:07:08,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:07:08,578 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:08,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 148 transitions, 357 flow. Second operand has 9 states, 9 states have (on average 139.55555555555554) internal successors, (1256), 9 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:08,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:08,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:08,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:08,950 INFO L130 PetriNetUnfolder]: 145/478 cut-off events. [2022-11-02 21:07:08,950 INFO L131 PetriNetUnfolder]: For 160/174 co-relation queries the response was YES. [2022-11-02 21:07:08,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 478 events. 145/478 cut-off events. For 160/174 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1887 event pairs, 10 based on Foata normal form. 9/481 useless extension candidates. Maximal degree in co-relation 923. Up to 56 conditions per place. [2022-11-02 21:07:08,955 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 68 selfloop transitions, 26 changer transitions 0/217 dead transitions. [2022-11-02 21:07:08,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 217 transitions, 780 flow [2022-11-02 21:07:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:07:08,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 21:07:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2007 transitions. [2022-11-02 21:07:08,961 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8688311688311688 [2022-11-02 21:07:08,962 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2007 transitions. [2022-11-02 21:07:08,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2007 transitions. [2022-11-02 21:07:08,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:08,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2007 transitions. [2022-11-02 21:07:08,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.35714285714286) internal successors, (2007), 14 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:08,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:08,976 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:08,976 INFO L175 Difference]: Start difference. First operand has 151 places, 148 transitions, 357 flow. Second operand 14 states and 2007 transitions. [2022-11-02 21:07:08,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 217 transitions, 780 flow [2022-11-02 21:07:08,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 217 transitions, 780 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 21:07:08,984 INFO L231 Difference]: Finished difference. Result has 168 places, 170 transitions, 515 flow [2022-11-02 21:07:08,984 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=515, PETRI_PLACES=168, PETRI_TRANSITIONS=170} [2022-11-02 21:07:08,985 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 20 predicate places. [2022-11-02 21:07:08,986 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 170 transitions, 515 flow [2022-11-02 21:07:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.55555555555554) internal successors, (1256), 9 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:08,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:08,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:07:09,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-02 21:07:09,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:09,203 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1244757955, now seen corresponding path program 1 times [2022-11-02 21:07:09,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482537706] [2022-11-02 21:07:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:09,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:09,398 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 21:07:09,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482537706] [2022-11-02 21:07:09,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482537706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:09,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:09,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:07:09,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966761154] [2022-11-02 21:07:09,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:09,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:07:09,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:09,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:07:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:07:09,403 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:09,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 170 transitions, 515 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:09,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:09,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:09,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:09,662 INFO L130 PetriNetUnfolder]: 145/508 cut-off events. [2022-11-02 21:07:09,663 INFO L131 PetriNetUnfolder]: For 472/495 co-relation queries the response was YES. [2022-11-02 21:07:09,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1233 conditions, 508 events. 145/508 cut-off events. For 472/495 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2208 event pairs, 56 based on Foata normal form. 4/501 useless extension candidates. Maximal degree in co-relation 1147. Up to 162 conditions per place. [2022-11-02 21:07:09,668 INFO L137 encePairwiseOnDemand]: 158/165 looper letters, 54 selfloop transitions, 9 changer transitions 5/191 dead transitions. [2022-11-02 21:07:09,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 191 transitions, 749 flow [2022-11-02 21:07:09,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:07:09,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:07:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 865 transitions. [2022-11-02 21:07:09,672 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8737373737373737 [2022-11-02 21:07:09,672 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 865 transitions. [2022-11-02 21:07:09,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 865 transitions. [2022-11-02 21:07:09,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:09,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 865 transitions. [2022-11-02 21:07:09,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.16666666666666) internal successors, (865), 6 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:09,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:09,679 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:09,679 INFO L175 Difference]: Start difference. First operand has 168 places, 170 transitions, 515 flow. Second operand 6 states and 865 transitions. [2022-11-02 21:07:09,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 191 transitions, 749 flow [2022-11-02 21:07:09,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 191 transitions, 716 flow, removed 10 selfloop flow, removed 3 redundant places. [2022-11-02 21:07:09,691 INFO L231 Difference]: Finished difference. Result has 172 places, 170 transitions, 508 flow [2022-11-02 21:07:09,692 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=508, PETRI_PLACES=172, PETRI_TRANSITIONS=170} [2022-11-02 21:07:09,695 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 24 predicate places. [2022-11-02 21:07:09,696 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 170 transitions, 508 flow [2022-11-02 21:07:09,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:09,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:09,697 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] [2022-11-02 21:07:09,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:07:09,698 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:09,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1475307053, now seen corresponding path program 2 times [2022-11-02 21:07:09,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:09,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017729934] [2022-11-02 21:07:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:09,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:09,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:09,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017729934] [2022-11-02 21:07:09,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017729934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:09,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375240733] [2022-11-02 21:07:09,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:07:09,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:09,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:09,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:09,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:07:10,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:07:10,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:10,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:07:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:10,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:10,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375240733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:10,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:10,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-02 21:07:10,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475670178] [2022-11-02 21:07:10,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:10,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:07:10,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:07:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:07:10,184 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:10,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 170 transitions, 508 flow. Second operand has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:10,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:10,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:10,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:10,520 INFO L130 PetriNetUnfolder]: 177/613 cut-off events. [2022-11-02 21:07:10,520 INFO L131 PetriNetUnfolder]: For 624/632 co-relation queries the response was YES. [2022-11-02 21:07:10,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 613 events. 177/613 cut-off events. For 624/632 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3043 event pairs, 28 based on Foata normal form. 15/619 useless extension candidates. Maximal degree in co-relation 1427. Up to 101 conditions per place. [2022-11-02 21:07:10,526 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 82 selfloop transitions, 22 changer transitions 1/228 dead transitions. [2022-11-02 21:07:10,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 228 transitions, 992 flow [2022-11-02 21:07:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:07:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 21:07:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1309 transitions. [2022-11-02 21:07:10,530 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8814814814814815 [2022-11-02 21:07:10,530 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1309 transitions. [2022-11-02 21:07:10,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1309 transitions. [2022-11-02 21:07:10,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:10,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1309 transitions. [2022-11-02 21:07:10,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.44444444444446) internal successors, (1309), 9 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:10,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:10,539 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:10,539 INFO L175 Difference]: Start difference. First operand has 172 places, 170 transitions, 508 flow. Second operand 9 states and 1309 transitions. [2022-11-02 21:07:10,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 228 transitions, 992 flow [2022-11-02 21:07:10,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 228 transitions, 974 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-02 21:07:10,547 INFO L231 Difference]: Finished difference. Result has 182 places, 183 transitions, 683 flow [2022-11-02 21:07:10,548 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=683, PETRI_PLACES=182, PETRI_TRANSITIONS=183} [2022-11-02 21:07:10,548 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 34 predicate places. [2022-11-02 21:07:10,549 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 183 transitions, 683 flow [2022-11-02 21:07:10,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.72727272727272) internal successors, (1537), 11 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:10,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:10,550 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] [2022-11-02 21:07:10,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:10,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 21:07:10,771 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:10,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash 977945227, now seen corresponding path program 3 times [2022-11-02 21:07:10,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:10,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988068919] [2022-11-02 21:07:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:10,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988068919] [2022-11-02 21:07:10,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988068919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:10,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999183622] [2022-11-02 21:07:10,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:07:10,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:10,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:10,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:10,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:07:11,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:07:11,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:07:11,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:11,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:11,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999183622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:11,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:11,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-02 21:07:11,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97897391] [2022-11-02 21:07:11,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:11,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:07:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:07:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:07:11,234 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:11,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 183 transitions, 683 flow. Second operand has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:11,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:11,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:11,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:11,614 INFO L130 PetriNetUnfolder]: 237/837 cut-off events. [2022-11-02 21:07:11,615 INFO L131 PetriNetUnfolder]: For 1607/1613 co-relation queries the response was YES. [2022-11-02 21:07:11,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 837 events. 237/837 cut-off events. For 1607/1613 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4819 event pairs, 37 based on Foata normal form. 12/841 useless extension candidates. Maximal degree in co-relation 2200. Up to 146 conditions per place. [2022-11-02 21:07:11,621 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 82 selfloop transitions, 48 changer transitions 1/254 dead transitions. [2022-11-02 21:07:11,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 1344 flow [2022-11-02 21:07:11,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:07:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 21:07:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1308 transitions. [2022-11-02 21:07:11,637 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8808080808080808 [2022-11-02 21:07:11,637 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1308 transitions. [2022-11-02 21:07:11,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1308 transitions. [2022-11-02 21:07:11,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:11,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1308 transitions. [2022-11-02 21:07:11,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.33333333333334) internal successors, (1308), 9 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:11,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:11,644 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:11,644 INFO L175 Difference]: Start difference. First operand has 182 places, 183 transitions, 683 flow. Second operand 9 states and 1308 transitions. [2022-11-02 21:07:11,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 1344 flow [2022-11-02 21:07:11,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 254 transitions, 1279 flow, removed 20 selfloop flow, removed 2 redundant places. [2022-11-02 21:07:11,662 INFO L231 Difference]: Finished difference. Result has 193 places, 208 transitions, 967 flow [2022-11-02 21:07:11,662 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=967, PETRI_PLACES=193, PETRI_TRANSITIONS=208} [2022-11-02 21:07:11,663 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 45 predicate places. [2022-11-02 21:07:11,663 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 208 transitions, 967 flow [2022-11-02 21:07:11,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.8181818181818) internal successors, (1538), 11 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:11,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:11,664 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] [2022-11-02 21:07:11,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:11,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:11,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:11,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:11,891 INFO L85 PathProgramCache]: Analyzing trace with hash 781788845, now seen corresponding path program 3 times [2022-11-02 21:07:11,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:11,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300235400] [2022-11-02 21:07:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:11,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:12,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300235400] [2022-11-02 21:07:12,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300235400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:12,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976275151] [2022-11-02 21:07:12,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:07:12,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:12,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:12,030 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:12,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:07:12,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:07:12,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:07:12,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:12,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:12,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:12,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976275151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:12,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:12,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-02 21:07:12,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870384842] [2022-11-02 21:07:12,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:12,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:07:12,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:07:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:07:12,256 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:12,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 208 transitions, 967 flow. Second operand has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:12,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:12,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:12,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:12,789 INFO L130 PetriNetUnfolder]: 269/909 cut-off events. [2022-11-02 21:07:12,789 INFO L131 PetriNetUnfolder]: For 2292/2292 co-relation queries the response was YES. [2022-11-02 21:07:12,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 909 events. 269/909 cut-off events. For 2292/2292 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5384 event pairs, 37 based on Foata normal form. 5/905 useless extension candidates. Maximal degree in co-relation 2658. Up to 117 conditions per place. [2022-11-02 21:07:12,798 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 86 selfloop transitions, 86 changer transitions 1/296 dead transitions. [2022-11-02 21:07:12,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 296 transitions, 1906 flow [2022-11-02 21:07:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:07:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 21:07:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2004 transitions. [2022-11-02 21:07:12,803 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8675324675324675 [2022-11-02 21:07:12,803 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2004 transitions. [2022-11-02 21:07:12,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2004 transitions. [2022-11-02 21:07:12,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:12,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2004 transitions. [2022-11-02 21:07:12,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:12,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:12,816 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:12,816 INFO L175 Difference]: Start difference. First operand has 193 places, 208 transitions, 967 flow. Second operand 14 states and 2004 transitions. [2022-11-02 21:07:12,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 296 transitions, 1906 flow [2022-11-02 21:07:12,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 296 transitions, 1874 flow, removed 14 selfloop flow, removed 1 redundant places. [2022-11-02 21:07:12,834 INFO L231 Difference]: Finished difference. Result has 210 places, 248 transitions, 1572 flow [2022-11-02 21:07:12,834 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1572, PETRI_PLACES=210, PETRI_TRANSITIONS=248} [2022-11-02 21:07:12,835 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 62 predicate places. [2022-11-02 21:07:12,835 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 248 transitions, 1572 flow [2022-11-02 21:07:12,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 139.44444444444446) internal successors, (1255), 9 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:12,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:12,837 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] [2022-11-02 21:07:12,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:13,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 21:07:13,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:13,062 INFO L85 PathProgramCache]: Analyzing trace with hash -12672981, now seen corresponding path program 4 times [2022-11-02 21:07:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:13,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901522742] [2022-11-02 21:07:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:13,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:13,203 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 21:07:13,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:13,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901522742] [2022-11-02 21:07:13,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901522742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:13,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:13,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:07:13,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306710963] [2022-11-02 21:07:13,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:13,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:07:13,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:13,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:07:13,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:07:13,208 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:13,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 248 transitions, 1572 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:13,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:13,209 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:13,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:13,528 INFO L130 PetriNetUnfolder]: 258/868 cut-off events. [2022-11-02 21:07:13,528 INFO L131 PetriNetUnfolder]: For 3113/3129 co-relation queries the response was YES. [2022-11-02 21:07:13,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2899 conditions, 868 events. 258/868 cut-off events. For 3113/3129 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4938 event pairs, 79 based on Foata normal form. 6/862 useless extension candidates. Maximal degree in co-relation 2796. Up to 290 conditions per place. [2022-11-02 21:07:13,540 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 120 selfloop transitions, 29 changer transitions 8/280 dead transitions. [2022-11-02 21:07:13,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 280 transitions, 2134 flow [2022-11-02 21:07:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:07:13,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:07:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2022-11-02 21:07:13,543 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8848484848484849 [2022-11-02 21:07:13,544 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2022-11-02 21:07:13,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2022-11-02 21:07:13,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:13,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2022-11-02 21:07:13,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:13,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:13,550 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:13,551 INFO L175 Difference]: Start difference. First operand has 210 places, 248 transitions, 1572 flow. Second operand 6 states and 876 transitions. [2022-11-02 21:07:13,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 280 transitions, 2134 flow [2022-11-02 21:07:13,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 280 transitions, 1943 flow, removed 53 selfloop flow, removed 6 redundant places. [2022-11-02 21:07:13,580 INFO L231 Difference]: Finished difference. Result has 211 places, 248 transitions, 1493 flow [2022-11-02 21:07:13,581 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1493, PETRI_PLACES=211, PETRI_TRANSITIONS=248} [2022-11-02 21:07:13,582 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 63 predicate places. [2022-11-02 21:07:13,582 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 248 transitions, 1493 flow [2022-11-02 21:07:13,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:13,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:13,583 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] [2022-11-02 21:07:13,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 21:07:13,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:13,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1323455551, now seen corresponding path program 5 times [2022-11-02 21:07:13,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:13,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015391804] [2022-11-02 21:07:13,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:13,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:13,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015391804] [2022-11-02 21:07:13,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015391804] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:13,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842364607] [2022-11-02 21:07:13,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:07:13,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:13,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:13,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:07:13,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:07:13,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:13,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:07:13,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:13,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:14,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:14,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842364607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:14,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:14,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-02 21:07:14,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884318283] [2022-11-02 21:07:14,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:14,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:07:14,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:14,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:07:14,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:07:14,036 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:14,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 248 transitions, 1493 flow. Second operand has 11 states, 11 states have (on average 139.9090909090909) internal successors, (1539), 11 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:14,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:14,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:14,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:14,451 INFO L130 PetriNetUnfolder]: 294/957 cut-off events. [2022-11-02 21:07:14,451 INFO L131 PetriNetUnfolder]: For 2778/2778 co-relation queries the response was YES. [2022-11-02 21:07:14,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3020 conditions, 957 events. 294/957 cut-off events. For 2778/2778 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5606 event pairs, 33 based on Foata normal form. 6/954 useless extension candidates. Maximal degree in co-relation 2920. Up to 131 conditions per place. [2022-11-02 21:07:14,482 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 105 selfloop transitions, 80 changer transitions 0/308 dead transitions. [2022-11-02 21:07:14,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 308 transitions, 2185 flow [2022-11-02 21:07:14,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:07:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-02 21:07:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1871 transitions. [2022-11-02 21:07:14,487 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8722610722610723 [2022-11-02 21:07:14,488 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1871 transitions. [2022-11-02 21:07:14,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1871 transitions. [2022-11-02 21:07:14,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:14,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1871 transitions. [2022-11-02 21:07:14,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 143.92307692307693) internal successors, (1871), 13 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:14,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:14,500 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:14,500 INFO L175 Difference]: Start difference. First operand has 211 places, 248 transitions, 1493 flow. Second operand 13 states and 1871 transitions. [2022-11-02 21:07:14,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 308 transitions, 2185 flow [2022-11-02 21:07:14,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 308 transitions, 2101 flow, removed 4 selfloop flow, removed 6 redundant places. [2022-11-02 21:07:14,529 INFO L231 Difference]: Finished difference. Result has 218 places, 258 transitions, 1702 flow [2022-11-02 21:07:14,530 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1702, PETRI_PLACES=218, PETRI_TRANSITIONS=258} [2022-11-02 21:07:14,530 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 70 predicate places. [2022-11-02 21:07:14,530 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 258 transitions, 1702 flow [2022-11-02 21:07:14,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.9090909090909) internal successors, (1539), 11 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:14,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:14,532 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] [2022-11-02 21:07:14,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:14,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:14,752 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:14,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash -840292503, now seen corresponding path program 4 times [2022-11-02 21:07:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:14,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129657565] [2022-11-02 21:07:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:14,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:14,897 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 21:07:14,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:14,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129657565] [2022-11-02 21:07:14,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129657565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:14,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:14,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:07:14,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556932964] [2022-11-02 21:07:14,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:14,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:07:14,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:07:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:07:14,901 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:14,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 258 transitions, 1702 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:14,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:14,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:14,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:15,170 INFO L130 PetriNetUnfolder]: 288/911 cut-off events. [2022-11-02 21:07:15,170 INFO L131 PetriNetUnfolder]: For 2918/2922 co-relation queries the response was YES. [2022-11-02 21:07:15,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3056 conditions, 911 events. 288/911 cut-off events. For 2918/2922 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5166 event pairs, 102 based on Foata normal form. 3/898 useless extension candidates. Maximal degree in co-relation 2957. Up to 310 conditions per place. [2022-11-02 21:07:15,180 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 113 selfloop transitions, 34 changer transitions 8/278 dead transitions. [2022-11-02 21:07:15,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 278 transitions, 2157 flow [2022-11-02 21:07:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:07:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 21:07:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 869 transitions. [2022-11-02 21:07:15,183 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8777777777777778 [2022-11-02 21:07:15,183 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 869 transitions. [2022-11-02 21:07:15,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 869 transitions. [2022-11-02 21:07:15,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:15,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 869 transitions. [2022-11-02 21:07:15,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:15,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:15,188 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:15,188 INFO L175 Difference]: Start difference. First operand has 218 places, 258 transitions, 1702 flow. Second operand 6 states and 869 transitions. [2022-11-02 21:07:15,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 278 transitions, 2157 flow [2022-11-02 21:07:15,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 278 transitions, 2147 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-02 21:07:15,210 INFO L231 Difference]: Finished difference. Result has 224 places, 257 transitions, 1755 flow [2022-11-02 21:07:15,211 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1755, PETRI_PLACES=224, PETRI_TRANSITIONS=257} [2022-11-02 21:07:15,211 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 76 predicate places. [2022-11-02 21:07:15,211 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 257 transitions, 1755 flow [2022-11-02 21:07:15,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:15,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:15,212 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] [2022-11-02 21:07:15,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 21:07:15,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:15,213 INFO L85 PathProgramCache]: Analyzing trace with hash -746607707, now seen corresponding path program 5 times [2022-11-02 21:07:15,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:15,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036998417] [2022-11-02 21:07:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:15,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:15,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:15,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:15,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036998417] [2022-11-02 21:07:15,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036998417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:15,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827196116] [2022-11-02 21:07:15,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:07:15,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:15,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:15,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:15,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:07:15,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:07:15,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:15,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 21:07:15,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:15,577 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 21:07:15,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:07:15,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827196116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:15,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:07:15,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-02 21:07:15,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345228501] [2022-11-02 21:07:15,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:15,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 21:07:15,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:15,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 21:07:15,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:07:15,580 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 165 [2022-11-02 21:07:15,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 257 transitions, 1755 flow. Second operand has 6 states, 6 states have (on average 127.5) internal successors, (765), 6 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:15,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:15,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 165 [2022-11-02 21:07:15,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:15,801 INFO L130 PetriNetUnfolder]: 119/642 cut-off events. [2022-11-02 21:07:15,801 INFO L131 PetriNetUnfolder]: For 1865/1904 co-relation queries the response was YES. [2022-11-02 21:07:15,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1891 conditions, 642 events. 119/642 cut-off events. For 1865/1904 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3328 event pairs, 21 based on Foata normal form. 17/644 useless extension candidates. Maximal degree in co-relation 1773. Up to 116 conditions per place. [2022-11-02 21:07:15,808 INFO L137 encePairwiseOnDemand]: 156/165 looper letters, 33 selfloop transitions, 6 changer transitions 4/265 dead transitions. [2022-11-02 21:07:15,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 265 transitions, 1860 flow [2022-11-02 21:07:15,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:07:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-02 21:07:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 903 transitions. [2022-11-02 21:07:15,813 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7818181818181819 [2022-11-02 21:07:15,814 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 903 transitions. [2022-11-02 21:07:15,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 903 transitions. [2022-11-02 21:07:15,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:15,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 903 transitions. [2022-11-02 21:07:15,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:15,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:15,820 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:15,821 INFO L175 Difference]: Start difference. First operand has 224 places, 257 transitions, 1755 flow. Second operand 7 states and 903 transitions. [2022-11-02 21:07:15,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 265 transitions, 1860 flow [2022-11-02 21:07:15,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 265 transitions, 1743 flow, removed 3 selfloop flow, removed 9 redundant places. [2022-11-02 21:07:15,839 INFO L231 Difference]: Finished difference. Result has 221 places, 258 transitions, 1662 flow [2022-11-02 21:07:15,839 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1662, PETRI_PLACES=221, PETRI_TRANSITIONS=258} [2022-11-02 21:07:15,841 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 73 predicate places. [2022-11-02 21:07:15,841 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 258 transitions, 1662 flow [2022-11-02 21:07:15,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 127.5) internal successors, (765), 6 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:15,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:15,842 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] [2022-11-02 21:07:15,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:16,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:16,054 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:16,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1010386646, now seen corresponding path program 1 times [2022-11-02 21:07:16,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:16,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701420658] [2022-11-02 21:07:16,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:16,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:07:16,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:16,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701420658] [2022-11-02 21:07:16,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701420658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:16,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440168585] [2022-11-02 21:07:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:16,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:16,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:16,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:16,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:07:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:07:16,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:07:16,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:07:16,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440168585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:16,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:16,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-02 21:07:16,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469092108] [2022-11-02 21:07:16,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:16,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:07:16,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:07:16,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:07:16,438 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 165 [2022-11-02 21:07:16,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 258 transitions, 1662 flow. Second operand has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:16,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:16,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 165 [2022-11-02 21:07:16,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:16,831 INFO L130 PetriNetUnfolder]: 302/943 cut-off events. [2022-11-02 21:07:16,832 INFO L131 PetriNetUnfolder]: For 2760/2760 co-relation queries the response was YES. [2022-11-02 21:07:16,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3121 conditions, 943 events. 302/943 cut-off events. For 2760/2760 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5271 event pairs, 64 based on Foata normal form. 5/938 useless extension candidates. Maximal degree in co-relation 3021. Up to 139 conditions per place. [2022-11-02 21:07:16,842 INFO L137 encePairwiseOnDemand]: 157/165 looper letters, 98 selfloop transitions, 85 changer transitions 1/308 dead transitions. [2022-11-02 21:07:16,842 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 308 transitions, 2336 flow [2022-11-02 21:07:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:07:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 21:07:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1722 transitions. [2022-11-02 21:07:16,848 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8696969696969697 [2022-11-02 21:07:16,848 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1722 transitions. [2022-11-02 21:07:16,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1722 transitions. [2022-11-02 21:07:16,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:16,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1722 transitions. [2022-11-02 21:07:16,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 143.5) internal successors, (1722), 12 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:16,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 165.0) internal successors, (2145), 13 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:16,861 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 165.0) internal successors, (2145), 13 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:16,861 INFO L175 Difference]: Start difference. First operand has 221 places, 258 transitions, 1662 flow. Second operand 12 states and 1722 transitions. [2022-11-02 21:07:16,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 308 transitions, 2336 flow [2022-11-02 21:07:16,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 308 transitions, 2312 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-11-02 21:07:16,883 INFO L231 Difference]: Finished difference. Result has 226 places, 268 transitions, 1937 flow [2022-11-02 21:07:16,883 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1937, PETRI_PLACES=226, PETRI_TRANSITIONS=268} [2022-11-02 21:07:16,884 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 78 predicate places. [2022-11-02 21:07:16,885 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 268 transitions, 1937 flow [2022-11-02 21:07:16,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 139.63636363636363) internal successors, (1536), 11 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:16,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:16,886 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] [2022-11-02 21:07:16,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:17,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 21:07:17,103 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:17,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:17,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1419073764, now seen corresponding path program 1 times [2022-11-02 21:07:17,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:17,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563768259] [2022-11-02 21:07:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:17,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:17,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:17,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563768259] [2022-11-02 21:07:17,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563768259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:17,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435299096] [2022-11-02 21:07:17,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:17,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:17,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:17,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:17,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:07:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:17,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 21:07:17,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:18,093 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 34 treesize of output 10 [2022-11-02 21:07:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:18,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:18,189 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 36 treesize of output 12 [2022-11-02 21:07:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:18,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435299096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:18,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:18,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 20 [2022-11-02 21:07:18,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847373728] [2022-11-02 21:07:18,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:18,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 21:07:18,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:18,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 21:07:18,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:07:18,464 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 165 [2022-11-02 21:07:18,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 268 transitions, 1937 flow. Second operand has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:18,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:18,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 165 [2022-11-02 21:07:18,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:19,725 INFO L130 PetriNetUnfolder]: 773/2887 cut-off events. [2022-11-02 21:07:19,726 INFO L131 PetriNetUnfolder]: For 9027/9230 co-relation queries the response was YES. [2022-11-02 21:07:19,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9259 conditions, 2887 events. 773/2887 cut-off events. For 9027/9230 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 24868 event pairs, 97 based on Foata normal form. 41/2849 useless extension candidates. Maximal degree in co-relation 8928. Up to 473 conditions per place. [2022-11-02 21:07:19,760 INFO L137 encePairwiseOnDemand]: 144/165 looper letters, 100 selfloop transitions, 33 changer transitions 10/348 dead transitions. [2022-11-02 21:07:19,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 348 transitions, 2432 flow [2022-11-02 21:07:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:07:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-02 21:07:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2141 transitions. [2022-11-02 21:07:19,766 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.5898071625344352 [2022-11-02 21:07:19,766 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2141 transitions. [2022-11-02 21:07:19,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2141 transitions. [2022-11-02 21:07:19,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:19,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2141 transitions. [2022-11-02 21:07:19,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 97.31818181818181) internal successors, (2141), 22 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,783 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,783 INFO L175 Difference]: Start difference. First operand has 226 places, 268 transitions, 1937 flow. Second operand 22 states and 2141 transitions. [2022-11-02 21:07:19,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 348 transitions, 2432 flow [2022-11-02 21:07:19,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 348 transitions, 2323 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-02 21:07:19,838 INFO L231 Difference]: Finished difference. Result has 250 places, 289 transitions, 2040 flow [2022-11-02 21:07:19,839 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2040, PETRI_PLACES=250, PETRI_TRANSITIONS=289} [2022-11-02 21:07:19,840 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 102 predicate places. [2022-11-02 21:07:19,840 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 289 transitions, 2040 flow [2022-11-02 21:07:19,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.35) internal successors, (1907), 20 states have internal predecessors, (1907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:19,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:19,841 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] [2022-11-02 21:07:19,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:20,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 21:07:20,061 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:20,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:20,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1822166128, now seen corresponding path program 2 times [2022-11-02 21:07:20,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:20,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80883978] [2022-11-02 21:07:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:20,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:21,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:21,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80883978] [2022-11-02 21:07:21,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80883978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:21,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528825248] [2022-11-02 21:07:21,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:07:21,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:21,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:21,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:21,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:07:21,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:07:21,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:21,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 21:07:21,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:21,470 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 34 treesize of output 10 [2022-11-02 21:07:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:21,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:21,560 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 36 treesize of output 12 [2022-11-02 21:07:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 21:07:21,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528825248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:21,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:21,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 11] total 29 [2022-11-02 21:07:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954784145] [2022-11-02 21:07:21,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:21,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 21:07:21,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:21,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 21:07:21,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:07:21,830 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 165 [2022-11-02 21:07:21,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 289 transitions, 2040 flow. Second operand has 29 states, 29 states have (on average 80.55172413793103) internal successors, (2336), 29 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:21,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:21,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 165 [2022-11-02 21:07:21,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:07:25,679 INFO L130 PetriNetUnfolder]: 1947/6952 cut-off events. [2022-11-02 21:07:25,679 INFO L131 PetriNetUnfolder]: For 22292/22976 co-relation queries the response was YES. [2022-11-02 21:07:25,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23611 conditions, 6952 events. 1947/6952 cut-off events. For 22292/22976 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 72994 event pairs, 206 based on Foata normal form. 145/6930 useless extension candidates. Maximal degree in co-relation 23506. Up to 1153 conditions per place. [2022-11-02 21:07:25,773 INFO L137 encePairwiseOnDemand]: 131/165 looper letters, 137 selfloop transitions, 60 changer transitions 49/435 dead transitions. [2022-11-02 21:07:25,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 435 transitions, 3072 flow [2022-11-02 21:07:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-02 21:07:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-02 21:07:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4202 transitions. [2022-11-02 21:07:25,781 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.48050314465408805 [2022-11-02 21:07:25,781 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4202 transitions. [2022-11-02 21:07:25,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4202 transitions. [2022-11-02 21:07:25,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:07:25,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4202 transitions. [2022-11-02 21:07:25,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 79.28301886792453) internal successors, (4202), 53 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:25,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:25,806 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 165.0) internal successors, (8910), 54 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:25,806 INFO L175 Difference]: Start difference. First operand has 250 places, 289 transitions, 2040 flow. Second operand 53 states and 4202 transitions. [2022-11-02 21:07:25,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 435 transitions, 3072 flow [2022-11-02 21:07:26,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 435 transitions, 2978 flow, removed 45 selfloop flow, removed 6 redundant places. [2022-11-02 21:07:26,025 INFO L231 Difference]: Finished difference. Result has 318 places, 319 transitions, 2377 flow [2022-11-02 21:07:26,026 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=2377, PETRI_PLACES=318, PETRI_TRANSITIONS=319} [2022-11-02 21:07:26,026 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 170 predicate places. [2022-11-02 21:07:26,026 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 319 transitions, 2377 flow [2022-11-02 21:07:26,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.55172413793103) internal successors, (2336), 29 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:26,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:07:26,028 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] [2022-11-02 21:07:26,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:26,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 21:07:26,242 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:07:26,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash -404257399, now seen corresponding path program 3 times [2022-11-02 21:07:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:26,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974456636] [2022-11-02 21:07:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:07:27,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974456636] [2022-11-02 21:07:27,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974456636] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:27,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287268890] [2022-11-02 21:07:27,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:07:27,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:27,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:27,919 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:27,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:07:28,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:07:28,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:28,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-02 21:07:28,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:28,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-02 21:07:29,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 21:07:29,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:07:29,648 INFO L356 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-02 21:07:29,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2022-11-02 21:07:29,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-02 21:07:29,782 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 23 treesize of output 7 [2022-11-02 21:07:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:07:29,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:31,303 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:07:31,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 97 [2022-11-02 21:07:31,353 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:07:31,354 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 368 treesize of output 326 [2022-11-02 21:07:31,401 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:07:31,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 302 treesize of output 276 [2022-11-02 21:07:31,441 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 21:07:31,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 106 [2022-11-02 21:07:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 21:07:33,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287268890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:33,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:33,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2022-11-02 21:07:33,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662316987] [2022-11-02 21:07:33,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:33,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-02 21:07:33,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:33,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-02 21:07:33,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2361, Unknown=35, NotChecked=0, Total=2652 [2022-11-02 21:07:33,724 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 165 [2022-11-02 21:07:33,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 319 transitions, 2377 flow. Second operand has 52 states, 52 states have (on average 73.86538461538461) internal successors, (3841), 52 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:33,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:07:33,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 165 [2022-11-02 21:07:33,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:39,863 INFO L130 PetriNetUnfolder]: 2177/8159 cut-off events. [2022-11-02 21:08:39,863 INFO L131 PetriNetUnfolder]: For 26817/27497 co-relation queries the response was YES. [2022-11-02 21:08:39,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27915 conditions, 8159 events. 2177/8159 cut-off events. For 26817/27497 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 91811 event pairs, 270 based on Foata normal form. 221/8212 useless extension candidates. Maximal degree in co-relation 27747. Up to 1278 conditions per place. [2022-11-02 21:08:39,999 INFO L137 encePairwiseOnDemand]: 132/165 looper letters, 129 selfloop transitions, 64 changer transitions 45/427 dead transitions. [2022-11-02 21:08:39,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 427 transitions, 3407 flow [2022-11-02 21:08:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 21:08:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-02 21:08:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3397 transitions. [2022-11-02 21:08:40,006 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.44756258234519103 [2022-11-02 21:08:40,006 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3397 transitions. [2022-11-02 21:08:40,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3397 transitions. [2022-11-02 21:08:40,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:40,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3397 transitions. [2022-11-02 21:08:40,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 73.84782608695652) internal successors, (3397), 46 states have internal predecessors, (3397), 0 states have call successors, (0), 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 21:08:40,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 165.0) internal successors, (7755), 47 states have internal predecessors, (7755), 0 states have call successors, (0), 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 21:08:40,029 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 165.0) internal successors, (7755), 47 states have internal predecessors, (7755), 0 states have call successors, (0), 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 21:08:40,029 INFO L175 Difference]: Start difference. First operand has 318 places, 319 transitions, 2377 flow. Second operand 46 states and 3397 transitions. [2022-11-02 21:08:40,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 427 transitions, 3407 flow [2022-11-02 21:08:40,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 427 transitions, 3257 flow, removed 48 selfloop flow, removed 28 redundant places. [2022-11-02 21:08:40,266 INFO L231 Difference]: Finished difference. Result has 342 places, 353 transitions, 2700 flow [2022-11-02 21:08:40,266 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2700, PETRI_PLACES=342, PETRI_TRANSITIONS=353} [2022-11-02 21:08:40,267 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 194 predicate places. [2022-11-02 21:08:40,267 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 353 transitions, 2700 flow [2022-11-02 21:08:40,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 73.86538461538461) internal successors, (3841), 52 states have internal predecessors, (3841), 0 states have call successors, (0), 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 21:08:40,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:40,269 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-11-02 21:08:40,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-02 21:08:40,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 21:08:40,482 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:40,483 INFO L85 PathProgramCache]: Analyzing trace with hash -396179199, now seen corresponding path program 4 times [2022-11-02 21:08:40,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:40,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888152907] [2022-11-02 21:08:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:40,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:08:41,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:41,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888152907] [2022-11-02 21:08:41,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888152907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:41,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290660412] [2022-11-02 21:08:41,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:08:41,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:41,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:41,119 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:41,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:08:41,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:08:41,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:08:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:08:42,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 21:08:42,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290660412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:42,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:42,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-02 21:08:42,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528111451] [2022-11-02 21:08:42,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:42,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:08:42,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:42,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:08:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:08:42,839 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-02 21:08:42,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 353 transitions, 2700 flow. Second operand has 19 states, 19 states have (on average 137.73684210526315) internal successors, (2617), 19 states have internal predecessors, (2617), 0 states have call successors, (0), 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 21:08:42,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:42,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-02 21:08:42,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:08:52,996 INFO L130 PetriNetUnfolder]: 5539/14866 cut-off events. [2022-11-02 21:08:52,996 INFO L131 PetriNetUnfolder]: For 56116/56920 co-relation queries the response was YES. [2022-11-02 21:08:53,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57585 conditions, 14866 events. 5539/14866 cut-off events. For 56116/56920 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 154703 event pairs, 957 based on Foata normal form. 147/14827 useless extension candidates. Maximal degree in co-relation 57289. Up to 3263 conditions per place. [2022-11-02 21:08:53,281 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 506 selfloop transitions, 215 changer transitions 26/914 dead transitions. [2022-11-02 21:08:53,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 914 transitions, 9001 flow [2022-11-02 21:08:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-02 21:08:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-02 21:08:53,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 7023 transitions. [2022-11-02 21:08:53,290 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8512727272727273 [2022-11-02 21:08:53,291 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 7023 transitions. [2022-11-02 21:08:53,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 7023 transitions. [2022-11-02 21:08:53,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:08:53,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 7023 transitions. [2022-11-02 21:08:53,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 140.46) internal successors, (7023), 50 states have internal predecessors, (7023), 0 states have call successors, (0), 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 21:08:53,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 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 21:08:53,500 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 165.0) internal successors, (8415), 51 states have internal predecessors, (8415), 0 states have call successors, (0), 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 21:08:53,501 INFO L175 Difference]: Start difference. First operand has 342 places, 353 transitions, 2700 flow. Second operand 50 states and 7023 transitions. [2022-11-02 21:08:53,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 914 transitions, 9001 flow [2022-11-02 21:08:53,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 914 transitions, 8775 flow, removed 89 selfloop flow, removed 26 redundant places. [2022-11-02 21:08:53,955 INFO L231 Difference]: Finished difference. Result has 372 places, 532 transitions, 4605 flow [2022-11-02 21:08:53,956 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4605, PETRI_PLACES=372, PETRI_TRANSITIONS=532} [2022-11-02 21:08:53,956 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 224 predicate places. [2022-11-02 21:08:53,956 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 532 transitions, 4605 flow [2022-11-02 21:08:53,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.73684210526315) internal successors, (2617), 19 states have internal predecessors, (2617), 0 states have call successors, (0), 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 21:08:53,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:08:53,958 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-11-02 21:08:53,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:54,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 21:08:54,174 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:08:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:54,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2121638207, now seen corresponding path program 5 times [2022-11-02 21:08:54,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:54,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077709827] [2022-11-02 21:08:54,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:54,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:54,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:08:54,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:54,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077709827] [2022-11-02 21:08:54,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077709827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:54,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954117700] [2022-11-02 21:08:54,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:08:54,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:54,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:54,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:54,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:08:55,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-02 21:08:55,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:08:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:08:55,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:08:56,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954117700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:56,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:56,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-02 21:08:56,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958036097] [2022-11-02 21:08:56,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:56,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 21:08:56,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:56,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 21:08:56,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:08:56,797 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-02 21:08:56,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 532 transitions, 4605 flow. Second operand has 21 states, 21 states have (on average 137.47619047619048) internal successors, (2887), 21 states have internal predecessors, (2887), 0 states have call successors, (0), 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 21:08:56,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:08:56,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-02 21:08:56,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:04,022 INFO L130 PetriNetUnfolder]: 5164/14504 cut-off events. [2022-11-02 21:09:04,022 INFO L131 PetriNetUnfolder]: For 77381/78175 co-relation queries the response was YES. [2022-11-02 21:09:04,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65376 conditions, 14504 events. 5164/14504 cut-off events. For 77381/78175 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 154661 event pairs, 1202 based on Foata normal form. 49/14333 useless extension candidates. Maximal degree in co-relation 64701. Up to 7237 conditions per place. [2022-11-02 21:09:04,241 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 367 selfloop transitions, 146 changer transitions 22/702 dead transitions. [2022-11-02 21:09:04,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 702 transitions, 7107 flow [2022-11-02 21:09:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 21:09:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-02 21:09:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3343 transitions. [2022-11-02 21:09:04,246 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8441919191919192 [2022-11-02 21:09:04,247 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3343 transitions. [2022-11-02 21:09:04,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3343 transitions. [2022-11-02 21:09:04,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:04,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3343 transitions. [2022-11-02 21:09:04,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 139.29166666666666) internal successors, (3343), 24 states have internal predecessors, (3343), 0 states have call successors, (0), 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 21:09:04,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 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 21:09:04,260 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 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 21:09:04,260 INFO L175 Difference]: Start difference. First operand has 372 places, 532 transitions, 4605 flow. Second operand 24 states and 3343 transitions. [2022-11-02 21:09:04,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 702 transitions, 7107 flow [2022-11-02 21:09:05,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 702 transitions, 7075 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-02 21:09:05,331 INFO L231 Difference]: Finished difference. Result has 400 places, 569 transitions, 5363 flow [2022-11-02 21:09:05,331 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4579, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5363, PETRI_PLACES=400, PETRI_TRANSITIONS=569} [2022-11-02 21:09:05,332 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 252 predicate places. [2022-11-02 21:09:05,332 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 569 transitions, 5363 flow [2022-11-02 21:09:05,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 137.47619047619048) internal successors, (2887), 21 states have internal predecessors, (2887), 0 states have call successors, (0), 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 21:09:05,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:05,333 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-11-02 21:09:05,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-02 21:09:05,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 21:09:05,533 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:05,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:05,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1286724209, now seen corresponding path program 6 times [2022-11-02 21:09:05,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:05,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966333357] [2022-11-02 21:09:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:05,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:09:06,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:06,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966333357] [2022-11-02 21:09:06,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966333357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:06,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368805733] [2022-11-02 21:09:06,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:09:06,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:06,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:06,094 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:06,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 21:09:06,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-02 21:09:06,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:06,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:09:06,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:09:07,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:09:07,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368805733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:07,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:07,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-02 21:09:07,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670230842] [2022-11-02 21:09:07,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:07,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:09:07,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:09:07,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:09:07,636 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-02 21:09:07,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 569 transitions, 5363 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 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 21:09:07,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:07,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-02 21:09:07,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:17,944 INFO L130 PetriNetUnfolder]: 7023/19198 cut-off events. [2022-11-02 21:09:17,944 INFO L131 PetriNetUnfolder]: For 123691/124648 co-relation queries the response was YES. [2022-11-02 21:09:18,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94037 conditions, 19198 events. 7023/19198 cut-off events. For 123691/124648 co-relation queries the response was YES. Maximal size of possible extension queue 761. Compared 210551 event pairs, 1311 based on Foata normal form. 83/19042 useless extension candidates. Maximal degree in co-relation 92554. Up to 8238 conditions per place. [2022-11-02 21:09:18,315 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 570 selfloop transitions, 240 changer transitions 26/1003 dead transitions. [2022-11-02 21:09:18,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1003 transitions, 11129 flow [2022-11-02 21:09:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 21:09:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-02 21:09:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5342 transitions. [2022-11-02 21:09:18,323 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8519936204146731 [2022-11-02 21:09:18,323 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5342 transitions. [2022-11-02 21:09:18,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5342 transitions. [2022-11-02 21:09:18,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:18,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5342 transitions. [2022-11-02 21:09:18,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 140.57894736842104) internal successors, (5342), 38 states have internal predecessors, (5342), 0 states have call successors, (0), 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 21:09:18,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 165.0) internal successors, (6435), 39 states have internal predecessors, (6435), 0 states have call successors, (0), 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 21:09:18,341 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 165.0) internal successors, (6435), 39 states have internal predecessors, (6435), 0 states have call successors, (0), 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 21:09:18,342 INFO L175 Difference]: Start difference. First operand has 400 places, 569 transitions, 5363 flow. Second operand 38 states and 5342 transitions. [2022-11-02 21:09:18,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1003 transitions, 11129 flow [2022-11-02 21:09:20,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 1003 transitions, 11052 flow, removed 23 selfloop flow, removed 3 redundant places. [2022-11-02 21:09:20,041 INFO L231 Difference]: Finished difference. Result has 454 places, 690 transitions, 7491 flow [2022-11-02 21:09:20,042 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=5318, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=7491, PETRI_PLACES=454, PETRI_TRANSITIONS=690} [2022-11-02 21:09:20,043 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 306 predicate places. [2022-11-02 21:09:20,043 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 690 transitions, 7491 flow [2022-11-02 21:09:20,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 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 21:09:20,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:20,044 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-11-02 21:09:20,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:20,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:20,265 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:20,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:20,266 INFO L85 PathProgramCache]: Analyzing trace with hash 88573891, now seen corresponding path program 7 times [2022-11-02 21:09:20,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:20,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566225992] [2022-11-02 21:09:20,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:20,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:09:20,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566225992] [2022-11-02 21:09:20,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566225992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:20,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651499152] [2022-11-02 21:09:20,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:09:20,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:20,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:20,816 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:20,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 21:09:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:20,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:09:20,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:09:21,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:09:22,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651499152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:22,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:22,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-02 21:09:22,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70215913] [2022-11-02 21:09:22,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:22,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:09:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:22,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:09:22,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:09:22,350 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-02 21:09:22,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 690 transitions, 7491 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 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 21:09:22,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:22,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-02 21:09:22,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 21:09:36,020 INFO L130 PetriNetUnfolder]: 9092/24823 cut-off events. [2022-11-02 21:09:36,020 INFO L131 PetriNetUnfolder]: For 188738/189932 co-relation queries the response was YES. [2022-11-02 21:09:36,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131044 conditions, 24823 events. 9092/24823 cut-off events. For 188738/189932 co-relation queries the response was YES. Maximal size of possible extension queue 1009. Compared 284015 event pairs, 1645 based on Foata normal form. 63/24630 useless extension candidates. Maximal degree in co-relation 129314. Up to 11303 conditions per place. [2022-11-02 21:09:36,590 INFO L137 encePairwiseOnDemand]: 153/165 looper letters, 658 selfloop transitions, 294 changer transitions 18/1137 dead transitions. [2022-11-02 21:09:36,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1137 transitions, 14211 flow [2022-11-02 21:09:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 21:09:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-02 21:09:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5069 transitions. [2022-11-02 21:09:36,599 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8533670033670033 [2022-11-02 21:09:36,600 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5069 transitions. [2022-11-02 21:09:36,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5069 transitions. [2022-11-02 21:09:36,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 21:09:36,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5069 transitions. [2022-11-02 21:09:36,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 140.80555555555554) internal successors, (5069), 36 states have internal predecessors, (5069), 0 states have call successors, (0), 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 21:09:36,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 165.0) internal successors, (6105), 37 states have internal predecessors, (6105), 0 states have call successors, (0), 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 21:09:36,629 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 165.0) internal successors, (6105), 37 states have internal predecessors, (6105), 0 states have call successors, (0), 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 21:09:36,630 INFO L175 Difference]: Start difference. First operand has 454 places, 690 transitions, 7491 flow. Second operand 36 states and 5069 transitions. [2022-11-02 21:09:36,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1137 transitions, 14211 flow [2022-11-02 21:09:42,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1137 transitions, 13791 flow, removed 138 selfloop flow, removed 5 redundant places. [2022-11-02 21:09:42,894 INFO L231 Difference]: Finished difference. Result has 503 places, 849 transitions, 10356 flow [2022-11-02 21:09:42,895 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7203, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10356, PETRI_PLACES=503, PETRI_TRANSITIONS=849} [2022-11-02 21:09:42,896 INFO L287 CegarLoopForPetriNet]: 148 programPoint places, 355 predicate places. [2022-11-02 21:09:42,896 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 849 transitions, 10356 flow [2022-11-02 21:09:42,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 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 21:09:42,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 21:09:42,897 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-11-02 21:09:42,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 21:09:43,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:43,102 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 21:09:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:09:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash 278084189, now seen corresponding path program 8 times [2022-11-02 21:09:43,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:09:43,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73723683] [2022-11-02 21:09:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:09:43,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:09:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:09:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:09:43,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:09:43,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73723683] [2022-11-02 21:09:43,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73723683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:09:43,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98852992] [2022-11-02 21:09:43,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:09:43,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:09:43,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:09:43,711 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:09:43,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d49b2c60-0985-4fd7-a3a4-427c07172b27/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 21:09:43,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:09:43,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:09:43,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:09:43,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:09:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:09:44,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:09:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:09:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98852992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:09:45,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:09:45,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 19 [2022-11-02 21:09:45,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964390594] [2022-11-02 21:09:45,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:09:45,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:09:45,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:09:45,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:09:45,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:09:45,205 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 165 [2022-11-02 21:09:45,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 849 transitions, 10356 flow. Second operand has 19 states, 19 states have (on average 137.57894736842104) internal successors, (2614), 19 states have internal predecessors, (2614), 0 states have call successors, (0), 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 21:09:45,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 21:09:45,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 165 [2022-11-02 21:09:45,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand