./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN --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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- 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-6b4ec56 [2022-11-20 10:44:26,401 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:44:26,403 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:44:26,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:44:26,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:44:26,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:44:26,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:44:26,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:44:26,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:44:26,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:44:26,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:44:26,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:44:26,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:44:26,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:44:26,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:44:26,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:44:26,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:44:26,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:44:26,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:44:26,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:44:26,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:44:26,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:44:26,489 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:44:26,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:44:26,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:44:26,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:44:26,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:44:26,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:44:26,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:44:26,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:44:26,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:44:26,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:44:26,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:44:26,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:44:26,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:44:26,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:44:26,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:44:26,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:44:26,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:44:26,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:44:26,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:44:26,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:44:26,568 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:44:26,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:44:26,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:44:26,575 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:44:26,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:44:26,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:44:26,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:44:26,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:44:26,578 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:44:26,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:44:26,579 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:44:26,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:44:26,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:44:26,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:44:26,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:44:26,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:44:26,581 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:44:26,581 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:44:26,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:44:26,582 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:44:26,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:44:26,582 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:44:26,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:44:26,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:44:26,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:44:26,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:44:26,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:44:26,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:44:26,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:44:26,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:44:26,585 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:44:26,586 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:44:26,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:44:26,587 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_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-11-20 10:44:26,907 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:44:26,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:44:26,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:44:26,938 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:44:26,939 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:44:26,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-20 10:44:30,155 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:44:30,388 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:44:30,389 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-20 10:44:30,397 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/data/1fcd2100e/fe3243b3460e457f8018985909adaee6/FLAGb88311da7 [2022-11-20 10:44:30,728 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/data/1fcd2100e/fe3243b3460e457f8018985909adaee6 [2022-11-20 10:44:30,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:44:30,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:44:30,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:44:30,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:44:30,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:44:30,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:44:30" (1/1) ... [2022-11-20 10:44:30,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75c15a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:30, skipping insertion in model container [2022-11-20 10:44:30,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:44:30" (1/1) ... [2022-11-20 10:44:30,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:44:30,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:44:30,984 WARN L237 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_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-20 10:44:30,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:44:31,008 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:44:31,055 WARN L237 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_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-20 10:44:31,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:44:31,078 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:44:31,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31 WrapperNode [2022-11-20 10:44:31,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:44:31,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:44:31,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:44:31,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:44:31,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,131 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-20 10:44:31,132 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:44:31,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:44:31,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:44:31,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:44:31,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,186 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:44:31,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:44:31,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:44:31,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:44:31,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (1/1) ... [2022-11-20 10:44:31,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:44:31,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:31,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:44:31,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:44:31,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:44:31,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 10:44:31,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 10:44:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 10:44:31,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 10:44:31,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:44:31,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:44:31,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:44:31,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:44:31,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:44:31,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:44:31,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:44:31,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:44:31,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:44:31,310 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:44:31,474 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:44:31,477 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:44:31,722 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:44:31,796 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:44:31,796 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:44:31,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:44:31 BoogieIcfgContainer [2022-11-20 10:44:31,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:44:31,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:44:31,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:44:31,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:44:31,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:44:30" (1/3) ... [2022-11-20 10:44:31,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e689c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:44:31, skipping insertion in model container [2022-11-20 10:44:31,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:44:31" (2/3) ... [2022-11-20 10:44:31,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e689c0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:44:31, skipping insertion in model container [2022-11-20 10:44:31,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:44:31" (3/3) ... [2022-11-20 10:44:31,845 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-11-20 10:44:31,868 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 10:44:31,881 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:44:31,882 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:44:31,882 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:44:31,948 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 10:44:31,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2022-11-20 10:44:32,049 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2022-11-20 10:44:32,049 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:44:32,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2022-11-20 10:44:32,055 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2022-11-20 10:44:32,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2022-11-20 10:44:32,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:44:32,082 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;@4567f1a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:44:32,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 10:44:32,110 INFO L130 PetriNetUnfolder]: 6/70 cut-off events. [2022-11-20 10:44:32,110 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:44:32,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:32,112 INFO L209 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] [2022-11-20 10:44:32,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:32,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:32,119 INFO L85 PathProgramCache]: Analyzing trace with hash 456373441, now seen corresponding path program 1 times [2022-11-20 10:44:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:32,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051208016] [2022-11-20 10:44:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:32,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:32,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:32,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051208016] [2022-11-20 10:44:32,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051208016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:44:32,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:44:32,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:44:32,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274007788] [2022-11-20 10:44:32,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:44:32,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:44:32,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:32,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:44:32,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:44:32,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 82 [2022-11-20 10:44:32,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:32,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:32,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 82 [2022-11-20 10:44:32,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:32,757 INFO L130 PetriNetUnfolder]: 10/93 cut-off events. [2022-11-20 10:44:32,758 INFO L131 PetriNetUnfolder]: For 18/19 co-relation queries the response was YES. [2022-11-20 10:44:32,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 93 events. 10/93 cut-off events. For 18/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 1 based on Foata normal form. 11/94 useless extension candidates. Maximal degree in co-relation 55. Up to 18 conditions per place. [2022-11-20 10:44:32,761 INFO L137 encePairwiseOnDemand]: 78/82 looper letters, 6 selfloop transitions, 0 changer transitions 2/67 dead transitions. [2022-11-20 10:44:32,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 158 flow [2022-11-20 10:44:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:44:32,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-20 10:44:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 152 transitions. [2022-11-20 10:44:32,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.926829268292683 [2022-11-20 10:44:32,787 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 152 transitions. [2022-11-20 10:44:32,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 152 transitions. [2022-11-20 10:44:32,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:32,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 152 transitions. [2022-11-20 10:44:32,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:32,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:32,812 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:32,814 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 2 states and 152 transitions. [2022-11-20 10:44:32,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 158 flow [2022-11-20 10:44:32,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:44:32,831 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 134 flow [2022-11-20 10:44:32,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2022-11-20 10:44:32,841 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, -3 predicate places. [2022-11-20 10:44:32,842 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 134 flow [2022-11-20 10:44:32,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.0) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:32,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:32,844 INFO L209 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] [2022-11-20 10:44:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:44:32,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1829195169, now seen corresponding path program 1 times [2022-11-20 10:44:32,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:32,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540446436] [2022-11-20 10:44:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:33,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:33,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540446436] [2022-11-20 10:44:33,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540446436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:44:33,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:44:33,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:44:33,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125151482] [2022-11-20 10:44:33,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:44:33,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:44:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:44:33,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:44:33,397 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 82 [2022-11-20 10:44:33,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 134 flow. Second operand has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:33,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 82 [2022-11-20 10:44:33,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:33,626 INFO L130 PetriNetUnfolder]: 64/183 cut-off events. [2022-11-20 10:44:33,626 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 10:44:33,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 183 events. 64/183 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 533 event pairs, 25 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 322. Up to 80 conditions per place. [2022-11-20 10:44:33,631 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 26 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2022-11-20 10:44:33,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 213 flow [2022-11-20 10:44:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:44:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:44:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 344 transitions. [2022-11-20 10:44:33,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2022-11-20 10:44:33,642 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 344 transitions. [2022-11-20 10:44:33,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 344 transitions. [2022-11-20 10:44:33,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:33,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 344 transitions. [2022-11-20 10:44:33,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 57.333333333333336) internal successors, (344), 6 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,652 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,652 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 134 flow. Second operand 6 states and 344 transitions. [2022-11-20 10:44:33,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 213 flow [2022-11-20 10:44:33,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 213 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-20 10:44:33,655 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 152 flow [2022-11-20 10:44:33,656 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2022-11-20 10:44:33,657 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2022-11-20 10:44:33,657 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 152 flow [2022-11-20 10:44:33,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.833333333333336) internal successors, (329), 6 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,658 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:33,658 INFO L209 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] [2022-11-20 10:44:33,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:44:33,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash -332340421, now seen corresponding path program 1 times [2022-11-20 10:44:33,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:33,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785117452] [2022-11-20 10:44:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:33,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:33,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:33,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785117452] [2022-11-20 10:44:33,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785117452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:44:33,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:44:33,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:44:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891309989] [2022-11-20 10:44:33,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:44:33,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:44:33,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:33,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:44:33,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:44:33,800 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-11-20 10:44:33,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:33,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-11-20 10:44:33,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:33,967 INFO L130 PetriNetUnfolder]: 87/283 cut-off events. [2022-11-20 10:44:33,972 INFO L131 PetriNetUnfolder]: For 52/52 co-relation queries the response was YES. [2022-11-20 10:44:33,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 283 events. 87/283 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1080 event pairs, 37 based on Foata normal form. 1/256 useless extension candidates. Maximal degree in co-relation 517. Up to 113 conditions per place. [2022-11-20 10:44:33,976 INFO L137 encePairwiseOnDemand]: 75/82 looper letters, 32 selfloop transitions, 5 changer transitions 1/86 dead transitions. [2022-11-20 10:44:33,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 291 flow [2022-11-20 10:44:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:44:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:44:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2022-11-20 10:44:33,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8048780487804879 [2022-11-20 10:44:33,982 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 396 transitions. [2022-11-20 10:44:33,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 396 transitions. [2022-11-20 10:44:33,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:33,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 396 transitions. [2022-11-20 10:44:33,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,988 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,988 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 152 flow. Second operand 6 states and 396 transitions. [2022-11-20 10:44:33,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 291 flow [2022-11-20 10:44:33,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-20 10:44:33,992 INFO L231 Difference]: Finished difference. Result has 77 places, 68 transitions, 170 flow [2022-11-20 10:44:33,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=77, PETRI_TRANSITIONS=68} [2022-11-20 10:44:33,994 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 5 predicate places. [2022-11-20 10:44:33,994 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 68 transitions, 170 flow [2022-11-20 10:44:33,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:33,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:33,995 INFO L209 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] [2022-11-20 10:44:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:44:33,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash 535359789, now seen corresponding path program 2 times [2022-11-20 10:44:33,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:33,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336597113] [2022-11-20 10:44:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:33,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:34,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:34,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336597113] [2022-11-20 10:44:34,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336597113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:34,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768904160] [2022-11-20 10:44:34,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:44:34,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:34,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:34,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:34,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:44:34,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 10:44:34,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:44:34,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:34,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:44:34,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768904160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:44:34,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:44:34,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2022-11-20 10:44:34,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253813934] [2022-11-20 10:44:34,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:44:34,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:44:34,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:34,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:44:34,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:44:34,548 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 82 [2022-11-20 10:44:34,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 68 transitions, 170 flow. Second operand has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:34,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:34,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 82 [2022-11-20 10:44:34,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:34,748 INFO L130 PetriNetUnfolder]: 44/166 cut-off events. [2022-11-20 10:44:34,748 INFO L131 PetriNetUnfolder]: For 50/56 co-relation queries the response was YES. [2022-11-20 10:44:34,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 166 events. 44/166 cut-off events. For 50/56 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 521 event pairs, 23 based on Foata normal form. 13/174 useless extension candidates. Maximal degree in co-relation 338. Up to 66 conditions per place. [2022-11-20 10:44:34,750 INFO L137 encePairwiseOnDemand]: 74/82 looper letters, 20 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-11-20 10:44:34,751 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 72 transitions, 233 flow [2022-11-20 10:44:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 10:44:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-20 10:44:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 460 transitions. [2022-11-20 10:44:34,753 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7012195121951219 [2022-11-20 10:44:34,753 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 460 transitions. [2022-11-20 10:44:34,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 460 transitions. [2022-11-20 10:44:34,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:34,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 460 transitions. [2022-11-20 10:44:34,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 57.5) internal successors, (460), 8 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:34,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:34,758 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 82.0) internal successors, (738), 9 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:34,758 INFO L175 Difference]: Start difference. First operand has 77 places, 68 transitions, 170 flow. Second operand 8 states and 460 transitions. [2022-11-20 10:44:34,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 72 transitions, 233 flow [2022-11-20 10:44:34,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 72 transitions, 221 flow, removed 3 selfloop flow, removed 4 redundant places. [2022-11-20 10:44:34,762 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 168 flow [2022-11-20 10:44:34,762 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2022-11-20 10:44:34,763 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2022-11-20 10:44:34,764 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 168 flow [2022-11-20 10:44:34,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.166666666666664) internal successors, (343), 6 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:34,764 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:34,765 INFO L209 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] [2022-11-20 10:44:34,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:34,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:34,972 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:34,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1175529915, now seen corresponding path program 1 times [2022-11-20 10:44:34,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:34,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11108168] [2022-11-20 10:44:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:34,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:35,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:35,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11108168] [2022-11-20 10:44:35,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11108168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:35,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392783503] [2022-11-20 10:44:35,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:35,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:35,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:35,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:35,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:44:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:35,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:44:35,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:35,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:36,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392783503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:36,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:36,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 8 [2022-11-20 10:44:36,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128471299] [2022-11-20 10:44:36,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:36,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:44:36,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:36,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:44:36,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:44:36,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 82 [2022-11-20 10:44:36,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 168 flow. Second operand has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:36,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:36,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 82 [2022-11-20 10:44:36,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:36,400 INFO L130 PetriNetUnfolder]: 17/162 cut-off events. [2022-11-20 10:44:36,400 INFO L131 PetriNetUnfolder]: For 38/44 co-relation queries the response was YES. [2022-11-20 10:44:36,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 162 events. 17/162 cut-off events. For 38/44 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 424 event pairs, 1 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 266. Up to 21 conditions per place. [2022-11-20 10:44:36,402 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 25 selfloop transitions, 5 changer transitions 5/86 dead transitions. [2022-11-20 10:44:36,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 86 transitions, 302 flow [2022-11-20 10:44:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:44:36,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-20 10:44:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2022-11-20 10:44:36,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7987804878048781 [2022-11-20 10:44:36,404 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 393 transitions. [2022-11-20 10:44:36,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 393 transitions. [2022-11-20 10:44:36,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:36,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 393 transitions. [2022-11-20 10:44:36,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.5) internal successors, (393), 6 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:36,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:36,408 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:36,408 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 168 flow. Second operand 6 states and 393 transitions. [2022-11-20 10:44:36,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 86 transitions, 302 flow [2022-11-20 10:44:36,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 86 transitions, 279 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-20 10:44:36,412 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 197 flow [2022-11-20 10:44:36,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2022-11-20 10:44:36,413 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2022-11-20 10:44:36,413 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 197 flow [2022-11-20 10:44:36,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 63.125) internal successors, (505), 8 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:36,414 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:36,414 INFO L209 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] [2022-11-20 10:44:36,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:36,620 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash 935055537, now seen corresponding path program 2 times [2022-11-20 10:44:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:36,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634296006] [2022-11-20 10:44:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:36,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:36,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634296006] [2022-11-20 10:44:36,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634296006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567518033] [2022-11-20 10:44:36,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:44:36,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:36,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:36,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:36,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:44:36,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:44:36,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:36,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:44:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:37,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:44:37,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567518033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:37,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:37,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 10 [2022-11-20 10:44:37,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401199645] [2022-11-20 10:44:37,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:37,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 10:44:37,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 10:44:37,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-20 10:44:37,280 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 82 [2022-11-20 10:44:37,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 197 flow. Second operand has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:37,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:37,281 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 82 [2022-11-20 10:44:37,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:37,494 INFO L130 PetriNetUnfolder]: 109/370 cut-off events. [2022-11-20 10:44:37,494 INFO L131 PetriNetUnfolder]: For 199/209 co-relation queries the response was YES. [2022-11-20 10:44:37,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829 conditions, 370 events. 109/370 cut-off events. For 199/209 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1745 event pairs, 24 based on Foata normal form. 15/376 useless extension candidates. Maximal degree in co-relation 819. Up to 124 conditions per place. [2022-11-20 10:44:37,497 INFO L137 encePairwiseOnDemand]: 76/82 looper letters, 34 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2022-11-20 10:44:37,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 99 transitions, 414 flow [2022-11-20 10:44:37,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 10:44:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 10:44:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2022-11-20 10:44:37,500 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8118466898954704 [2022-11-20 10:44:37,500 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2022-11-20 10:44:37,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2022-11-20 10:44:37,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:37,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2022-11-20 10:44:37,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:37,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:37,504 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 82.0) internal successors, (656), 8 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:37,505 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 197 flow. Second operand 7 states and 466 transitions. [2022-11-20 10:44:37,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 99 transitions, 414 flow [2022-11-20 10:44:37,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 99 transitions, 410 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-20 10:44:37,509 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 338 flow [2022-11-20 10:44:37,509 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2022-11-20 10:44:37,510 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 16 predicate places. [2022-11-20 10:44:37,510 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 338 flow [2022-11-20 10:44:37,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 64.2) internal successors, (642), 10 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:37,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:37,511 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:44:37,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:37,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 10:44:37,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1891359299, now seen corresponding path program 3 times [2022-11-20 10:44:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:37,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787908569] [2022-11-20 10:44:37,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:37,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:38,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:38,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787908569] [2022-11-20 10:44:38,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787908569] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:38,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221943220] [2022-11-20 10:44:38,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:44:38,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:38,071 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:38,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:44:38,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 10:44:38,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:38,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:44:38,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:38,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:38,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221943220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:38,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:38,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 20 [2022-11-20 10:44:38,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773593851] [2022-11-20 10:44:38,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:38,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 10:44:38,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:38,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 10:44:38,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-20 10:44:38,560 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:44:38,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 338 flow. Second operand has 20 states, 20 states have (on average 59.85) internal successors, (1197), 20 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:38,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:38,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:44:38,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:40,591 INFO L130 PetriNetUnfolder]: 312/859 cut-off events. [2022-11-20 10:44:40,591 INFO L131 PetriNetUnfolder]: For 1295/1295 co-relation queries the response was YES. [2022-11-20 10:44:40,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 859 events. 312/859 cut-off events. For 1295/1295 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4686 event pairs, 14 based on Foata normal form. 29/887 useless extension candidates. Maximal degree in co-relation 2530. Up to 168 conditions per place. [2022-11-20 10:44:40,600 INFO L137 encePairwiseOnDemand]: 69/82 looper letters, 117 selfloop transitions, 134 changer transitions 11/307 dead transitions. [2022-11-20 10:44:40,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 307 transitions, 1960 flow [2022-11-20 10:44:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 10:44:40,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-20 10:44:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3368 transitions. [2022-11-20 10:44:40,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7467849223946785 [2022-11-20 10:44:40,611 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3368 transitions. [2022-11-20 10:44:40,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3368 transitions. [2022-11-20 10:44:40,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:40,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3368 transitions. [2022-11-20 10:44:40,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 61.236363636363635) internal successors, (3368), 55 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:40,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:40,640 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 82.0) internal successors, (4592), 56 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:40,640 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 338 flow. Second operand 55 states and 3368 transitions. [2022-11-20 10:44:40,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 307 transitions, 1960 flow [2022-11-20 10:44:40,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 307 transitions, 1952 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-11-20 10:44:40,660 INFO L231 Difference]: Finished difference. Result has 154 places, 206 transitions, 1422 flow [2022-11-20 10:44:40,661 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=1422, PETRI_PLACES=154, PETRI_TRANSITIONS=206} [2022-11-20 10:44:40,662 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 82 predicate places. [2022-11-20 10:44:40,662 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 206 transitions, 1422 flow [2022-11-20 10:44:40,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 59.85) internal successors, (1197), 20 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:40,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:40,664 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:44:40,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:40,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:40,870 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:40,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:40,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1408127925, now seen corresponding path program 4 times [2022-11-20 10:44:40,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:40,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161799499] [2022-11-20 10:44:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:40,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:41,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161799499] [2022-11-20 10:44:41,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161799499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:41,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018086137] [2022-11-20 10:44:41,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:44:41,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:41,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:41,161 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:41,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:44:41,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:44:41,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:41,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:44:41,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:41,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:41,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:41,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018086137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:41,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:41,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 26 [2022-11-20 10:44:41,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430309095] [2022-11-20 10:44:41,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:41,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 10:44:41,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 10:44:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-11-20 10:44:41,912 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:44:41,914 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 206 transitions, 1422 flow. Second operand has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:41,914 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:41,914 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:44:41,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:44,479 INFO L130 PetriNetUnfolder]: 789/2294 cut-off events. [2022-11-20 10:44:44,479 INFO L131 PetriNetUnfolder]: For 7906/7906 co-relation queries the response was YES. [2022-11-20 10:44:44,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8794 conditions, 2294 events. 789/2294 cut-off events. For 7906/7906 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17331 event pairs, 55 based on Foata normal form. 124/2410 useless extension candidates. Maximal degree in co-relation 8768. Up to 444 conditions per place. [2022-11-20 10:44:44,508 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 312 selfloop transitions, 334 changer transitions 21/712 dead transitions. [2022-11-20 10:44:44,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 712 transitions, 6678 flow [2022-11-20 10:44:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 10:44:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-20 10:44:44,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3772 transitions. [2022-11-20 10:44:44,517 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7540983606557377 [2022-11-20 10:44:44,517 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3772 transitions. [2022-11-20 10:44:44,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3772 transitions. [2022-11-20 10:44:44,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:44,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3772 transitions. [2022-11-20 10:44:44,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 61.83606557377049) internal successors, (3772), 61 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:44,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:44,541 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 82.0) internal successors, (5084), 62 states have internal predecessors, (5084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:44,542 INFO L175 Difference]: Start difference. First operand has 154 places, 206 transitions, 1422 flow. Second operand 61 states and 3772 transitions. [2022-11-20 10:44:44,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 712 transitions, 6678 flow [2022-11-20 10:44:44,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 712 transitions, 6187 flow, removed 216 selfloop flow, removed 6 redundant places. [2022-11-20 10:44:44,600 INFO L231 Difference]: Finished difference. Result has 238 places, 492 transitions, 4915 flow [2022-11-20 10:44:44,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=4915, PETRI_PLACES=238, PETRI_TRANSITIONS=492} [2022-11-20 10:44:44,601 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 166 predicate places. [2022-11-20 10:44:44,602 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 492 transitions, 4915 flow [2022-11-20 10:44:44,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 59.61538461538461) internal successors, (1550), 26 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:44,603 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:44,603 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:44:44,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:44,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:44:44,809 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1094755459, now seen corresponding path program 5 times [2022-11-20 10:44:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:44,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834034389] [2022-11-20 10:44:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:44,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:45,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:45,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834034389] [2022-11-20 10:44:45,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834034389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:45,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509715434] [2022-11-20 10:44:45,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:44:45,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:45,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:45,126 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:45,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:44:45,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-20 10:44:45,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:45,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 10:44:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:45,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:45,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509715434] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:45,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:45,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2022-11-20 10:44:45,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118514147] [2022-11-20 10:44:45,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:45,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:44:45,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:45,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:44:45,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:44:45,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:44:45,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 492 transitions, 4915 flow. Second operand has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:45,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:45,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:44:45,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:48,024 INFO L130 PetriNetUnfolder]: 962/2730 cut-off events. [2022-11-20 10:44:48,024 INFO L131 PetriNetUnfolder]: For 23272/23272 co-relation queries the response was YES. [2022-11-20 10:44:48,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14528 conditions, 2730 events. 962/2730 cut-off events. For 23272/23272 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 21724 event pairs, 19 based on Foata normal form. 33/2753 useless extension candidates. Maximal degree in co-relation 14474. Up to 512 conditions per place. [2022-11-20 10:44:48,082 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 183 selfloop transitions, 511 changer transitions 7/746 dead transitions. [2022-11-20 10:44:48,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 746 transitions, 9027 flow [2022-11-20 10:44:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 10:44:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-20 10:44:48,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2387 transitions. [2022-11-20 10:44:48,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7464040025015635 [2022-11-20 10:44:48,088 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2387 transitions. [2022-11-20 10:44:48,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2387 transitions. [2022-11-20 10:44:48,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:48,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2387 transitions. [2022-11-20 10:44:48,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.205128205128204) internal successors, (2387), 39 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:48,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:48,103 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 82.0) internal successors, (3280), 40 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:48,103 INFO L175 Difference]: Start difference. First operand has 238 places, 492 transitions, 4915 flow. Second operand 39 states and 2387 transitions. [2022-11-20 10:44:48,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 746 transitions, 9027 flow [2022-11-20 10:44:48,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 746 transitions, 8707 flow, removed 157 selfloop flow, removed 3 redundant places. [2022-11-20 10:44:48,381 INFO L231 Difference]: Finished difference. Result has 287 places, 646 transitions, 8206 flow [2022-11-20 10:44:48,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=8206, PETRI_PLACES=287, PETRI_TRANSITIONS=646} [2022-11-20 10:44:48,383 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 215 predicate places. [2022-11-20 10:44:48,383 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 646 transitions, 8206 flow [2022-11-20 10:44:48,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 59.68) internal successors, (1492), 25 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:48,384 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:48,385 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:44:48,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:48,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:48,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:48,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1269435027, now seen corresponding path program 6 times [2022-11-20 10:44:48,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:48,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713277195] [2022-11-20 10:44:48,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:48,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:48,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:48,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713277195] [2022-11-20 10:44:48,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713277195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:48,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786640996] [2022-11-20 10:44:48,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:44:48,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:48,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:48,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:48,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:44:48,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 10:44:48,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:44:48,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:49,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:49,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786640996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:49,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:49,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-11-20 10:44:49,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083002945] [2022-11-20 10:44:49,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:49,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:44:49,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:49,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:44:49,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:44:49,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:44:49,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 646 transitions, 8206 flow. Second operand has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 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) [2022-11-20 10:44:49,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:49,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:44:49,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:53,459 INFO L130 PetriNetUnfolder]: 1247/3669 cut-off events. [2022-11-20 10:44:53,460 INFO L131 PetriNetUnfolder]: For 47062/47062 co-relation queries the response was YES. [2022-11-20 10:44:53,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 3669 events. 1247/3669 cut-off events. For 47062/47062 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 31749 event pairs, 53 based on Foata normal form. 38/3675 useless extension candidates. Maximal degree in co-relation 22481. Up to 626 conditions per place. [2022-11-20 10:44:53,551 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 256 selfloop transitions, 795 changer transitions 9/1105 dead transitions. [2022-11-20 10:44:53,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1105 transitions, 16324 flow [2022-11-20 10:44:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-20 10:44:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-20 10:44:53,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4397 transitions. [2022-11-20 10:44:53,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7447493224932249 [2022-11-20 10:44:53,579 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4397 transitions. [2022-11-20 10:44:53,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4397 transitions. [2022-11-20 10:44:53,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:53,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4397 transitions. [2022-11-20 10:44:53,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 61.06944444444444) internal successors, (4397), 72 states have internal predecessors, (4397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:53,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:53,627 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 82.0) internal successors, (5986), 73 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:53,627 INFO L175 Difference]: Start difference. First operand has 287 places, 646 transitions, 8206 flow. Second operand 72 states and 4397 transitions. [2022-11-20 10:44:53,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1105 transitions, 16324 flow [2022-11-20 10:44:54,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1105 transitions, 15317 flow, removed 156 selfloop flow, removed 19 redundant places. [2022-11-20 10:44:54,133 INFO L231 Difference]: Finished difference. Result has 369 places, 944 transitions, 14092 flow [2022-11-20 10:44:54,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=7528, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=510, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=14092, PETRI_PLACES=369, PETRI_TRANSITIONS=944} [2022-11-20 10:44:54,135 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 297 predicate places. [2022-11-20 10:44:54,135 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 944 transitions, 14092 flow [2022-11-20 10:44:54,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.45454545454545) internal successors, (1308), 22 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) [2022-11-20 10:44:54,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:54,137 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:44:54,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:54,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:54,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:54,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1154924529, now seen corresponding path program 7 times [2022-11-20 10:44:54,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:54,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459588085] [2022-11-20 10:44:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:54,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:54,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459588085] [2022-11-20 10:44:54,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459588085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320439708] [2022-11-20 10:44:54,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:44:54,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:54,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:54,647 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:54,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:44:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:44:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:54,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:44:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:55,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320439708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:44:55,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:44:55,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2022-11-20 10:44:55,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411178824] [2022-11-20 10:44:55,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:44:55,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 10:44:55,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:44:55,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 10:44:55,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-20 10:44:55,208 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:44:55,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 944 transitions, 14092 flow. Second operand has 22 states, 22 states have (on average 59.40909090909091) internal successors, (1307), 22 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:55,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:44:55,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:44:55,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:44:58,378 INFO L130 PetriNetUnfolder]: 1335/4010 cut-off events. [2022-11-20 10:44:58,378 INFO L131 PetriNetUnfolder]: For 67055/67055 co-relation queries the response was YES. [2022-11-20 10:44:58,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27448 conditions, 4010 events. 1335/4010 cut-off events. For 67055/67055 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 35626 event pairs, 28 based on Foata normal form. 2/4002 useless extension candidates. Maximal degree in co-relation 27354. Up to 674 conditions per place. [2022-11-20 10:44:58,472 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 381 selfloop transitions, 755 changer transitions 35/1216 dead transitions. [2022-11-20 10:44:58,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1216 transitions, 21058 flow [2022-11-20 10:44:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 10:44:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-20 10:44:58,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2515 transitions. [2022-11-20 10:44:58,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7480666270077335 [2022-11-20 10:44:58,480 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2515 transitions. [2022-11-20 10:44:58,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2515 transitions. [2022-11-20 10:44:58,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:44:58,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2515 transitions. [2022-11-20 10:44:58,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.34146341463415) internal successors, (2515), 41 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:58,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:58,500 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:58,500 INFO L175 Difference]: Start difference. First operand has 369 places, 944 transitions, 14092 flow. Second operand 41 states and 2515 transitions. [2022-11-20 10:44:58,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1216 transitions, 21058 flow [2022-11-20 10:44:59,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1216 transitions, 20592 flow, removed 170 selfloop flow, removed 21 redundant places. [2022-11-20 10:44:59,051 INFO L231 Difference]: Finished difference. Result has 396 places, 1064 transitions, 17958 flow [2022-11-20 10:44:59,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=13600, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=633, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17958, PETRI_PLACES=396, PETRI_TRANSITIONS=1064} [2022-11-20 10:44:59,052 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 324 predicate places. [2022-11-20 10:44:59,052 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1064 transitions, 17958 flow [2022-11-20 10:44:59,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 59.40909090909091) internal successors, (1307), 22 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:44:59,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:44:59,053 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:44:59,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:44:59,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:59,254 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:44:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:44:59,254 INFO L85 PathProgramCache]: Analyzing trace with hash 807666431, now seen corresponding path program 8 times [2022-11-20 10:44:59,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:44:59,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946183235] [2022-11-20 10:44:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:44:59,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:44:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:44:59,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:59,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:44:59,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946183235] [2022-11-20 10:44:59,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946183235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:44:59,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543686355] [2022-11-20 10:44:59,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:44:59,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:44:59,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:44:59,519 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:44:59,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:44:59,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:44:59,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:44:59,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:44:59,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:44:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:44:59,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:00,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543686355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:00,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:45:00,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-20 10:45:00,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567567342] [2022-11-20 10:45:00,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:45:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:45:00,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:45:00,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:45:00,064 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:45:00,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1064 transitions, 17958 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:00,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:45:00,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:45:00,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:45:02,418 INFO L130 PetriNetUnfolder]: 1306/3865 cut-off events. [2022-11-20 10:45:02,418 INFO L131 PetriNetUnfolder]: For 65881/65881 co-relation queries the response was YES. [2022-11-20 10:45:02,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28443 conditions, 3865 events. 1306/3865 cut-off events. For 65881/65881 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 33884 event pairs, 121 based on Foata normal form. 1/3804 useless extension candidates. Maximal degree in co-relation 28346. Up to 655 conditions per place. [2022-11-20 10:45:02,473 INFO L137 encePairwiseOnDemand]: 71/82 looper letters, 467 selfloop transitions, 618 changer transitions 12/1142 dead transitions. [2022-11-20 10:45:02,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1142 transitions, 21266 flow [2022-11-20 10:45:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 10:45:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-20 10:45:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1296 transitions. [2022-11-20 10:45:02,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7526132404181185 [2022-11-20 10:45:02,480 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1296 transitions. [2022-11-20 10:45:02,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1296 transitions. [2022-11-20 10:45:02,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:45:02,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1296 transitions. [2022-11-20 10:45:02,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.714285714285715) internal successors, (1296), 21 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:02,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:02,490 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 82.0) internal successors, (1804), 22 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:02,491 INFO L175 Difference]: Start difference. First operand has 396 places, 1064 transitions, 17958 flow. Second operand 21 states and 1296 transitions. [2022-11-20 10:45:02,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1142 transitions, 21266 flow [2022-11-20 10:45:03,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1142 transitions, 20505 flow, removed 95 selfloop flow, removed 20 redundant places. [2022-11-20 10:45:03,188 INFO L231 Difference]: Finished difference. Result has 398 places, 1081 transitions, 18737 flow [2022-11-20 10:45:03,189 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17233, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=601, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=18737, PETRI_PLACES=398, PETRI_TRANSITIONS=1081} [2022-11-20 10:45:03,189 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 326 predicate places. [2022-11-20 10:45:03,191 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1081 transitions, 18737 flow [2022-11-20 10:45:03,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:03,192 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:45:03,192 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:45:03,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:03,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:03,398 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:45:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1961362925, now seen corresponding path program 9 times [2022-11-20 10:45:03,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:45:03,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537539559] [2022-11-20 10:45:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:45:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:45:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:03,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:45:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537539559] [2022-11-20 10:45:03,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537539559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:45:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105615677] [2022-11-20 10:45:03,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:45:03,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:03,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:45:03,574 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:45:03,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:45:03,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:45:03,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:03,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:45:03,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:03,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:04,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105615677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:04,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:45:04,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-20 10:45:04,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149299245] [2022-11-20 10:45:04,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:04,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:45:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:45:04,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:45:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:45:04,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:45:04,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1081 transitions, 18737 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:04,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:45:04,100 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:45:04,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:45:08,181 INFO L130 PetriNetUnfolder]: 1753/5167 cut-off events. [2022-11-20 10:45:08,181 INFO L131 PetriNetUnfolder]: For 92051/92051 co-relation queries the response was YES. [2022-11-20 10:45:08,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38678 conditions, 5167 events. 1753/5167 cut-off events. For 92051/92051 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 48236 event pairs, 70 based on Foata normal form. 43/5175 useless extension candidates. Maximal degree in co-relation 38579. Up to 927 conditions per place. [2022-11-20 10:45:08,283 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 339 selfloop transitions, 1251 changer transitions 3/1638 dead transitions. [2022-11-20 10:45:08,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1638 transitions, 31405 flow [2022-11-20 10:45:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 10:45:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-20 10:45:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3837 transitions. [2022-11-20 10:45:08,291 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7427409988385598 [2022-11-20 10:45:08,292 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3837 transitions. [2022-11-20 10:45:08,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3837 transitions. [2022-11-20 10:45:08,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:45:08,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3837 transitions. [2022-11-20 10:45:08,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 60.904761904761905) internal successors, (3837), 63 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:08,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:08,311 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 82.0) internal successors, (5248), 64 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:08,312 INFO L175 Difference]: Start difference. First operand has 398 places, 1081 transitions, 18737 flow. Second operand 63 states and 3837 transitions. [2022-11-20 10:45:08,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1638 transitions, 31405 flow [2022-11-20 10:45:09,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 1638 transitions, 30349 flow, removed 13 selfloop flow, removed 11 redundant places. [2022-11-20 10:45:09,487 INFO L231 Difference]: Finished difference. Result has 468 places, 1493 transitions, 29791 flow [2022-11-20 10:45:09,488 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=17993, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=848, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=29791, PETRI_PLACES=468, PETRI_TRANSITIONS=1493} [2022-11-20 10:45:09,489 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 396 predicate places. [2022-11-20 10:45:09,489 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1493 transitions, 29791 flow [2022-11-20 10:45:09,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:09,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:45:09,490 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:45:09,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:09,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:09,695 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:45:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1120395217, now seen corresponding path program 10 times [2022-11-20 10:45:09,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:45:09,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980342704] [2022-11-20 10:45:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:45:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:45:09,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:09,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:45:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980342704] [2022-11-20 10:45:09,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980342704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:45:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494055736] [2022-11-20 10:45:09,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:45:09,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:09,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:45:09,899 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:45:09,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:45:09,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:45:09,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:09,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:45:09,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:10,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:10,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:10,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494055736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:10,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:45:10,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-20 10:45:10,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284931487] [2022-11-20 10:45:10,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:10,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:45:10,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:45:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:45:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:45:10,414 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:45:10,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1493 transitions, 29791 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:10,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:45:10,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:45:10,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:45:14,699 INFO L130 PetriNetUnfolder]: 1765/5272 cut-off events. [2022-11-20 10:45:14,699 INFO L131 PetriNetUnfolder]: For 119527/119527 co-relation queries the response was YES. [2022-11-20 10:45:14,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43669 conditions, 5272 events. 1765/5272 cut-off events. For 119527/119527 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 49899 event pairs, 92 based on Foata normal form. 4/5233 useless extension candidates. Maximal degree in co-relation 43551. Up to 900 conditions per place. [2022-11-20 10:45:14,806 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 539 selfloop transitions, 1047 changer transitions 16/1647 dead transitions. [2022-11-20 10:45:14,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1647 transitions, 35637 flow [2022-11-20 10:45:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 10:45:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2022-11-20 10:45:14,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2525 transitions. [2022-11-20 10:45:14,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7510410469958358 [2022-11-20 10:45:14,813 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2525 transitions. [2022-11-20 10:45:14,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2525 transitions. [2022-11-20 10:45:14,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:45:14,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2525 transitions. [2022-11-20 10:45:14,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 61.58536585365854) internal successors, (2525), 41 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:14,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:14,829 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 82.0) internal successors, (3444), 42 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:14,829 INFO L175 Difference]: Start difference. First operand has 468 places, 1493 transitions, 29791 flow. Second operand 41 states and 2525 transitions. [2022-11-20 10:45:14,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1647 transitions, 35637 flow [2022-11-20 10:45:16,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1647 transitions, 34840 flow, removed 132 selfloop flow, removed 31 redundant places. [2022-11-20 10:45:16,339 INFO L231 Difference]: Finished difference. Result has 484 places, 1527 transitions, 32213 flow [2022-11-20 10:45:16,341 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=28994, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=32213, PETRI_PLACES=484, PETRI_TRANSITIONS=1527} [2022-11-20 10:45:16,341 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 412 predicate places. [2022-11-20 10:45:16,341 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1527 transitions, 32213 flow [2022-11-20 10:45:16,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:16,342 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:45:16,342 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:45:16,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:16,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 10:45:16,543 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:45:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:16,543 INFO L85 PathProgramCache]: Analyzing trace with hash 423445929, now seen corresponding path program 11 times [2022-11-20 10:45:16,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:45:16,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001494235] [2022-11-20 10:45:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:45:16,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:45:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:16,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:45:16,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001494235] [2022-11-20 10:45:16,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001494235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:45:16,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73719069] [2022-11-20 10:45:16,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:45:16,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:16,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:45:16,731 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:45:16,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:45:16,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-20 10:45:16,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 10:45:16,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:16,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:17,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73719069] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:17,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:45:17,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-20 10:45:17,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790112806] [2022-11-20 10:45:17,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:17,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:45:17,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:45:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:45:17,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-11-20 10:45:17,149 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:45:17,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1527 transitions, 32213 flow. Second operand has 21 states, 21 states have (on average 59.285714285714285) internal successors, (1245), 21 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:17,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:45:17,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:45:17,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:45:23,616 INFO L130 PetriNetUnfolder]: 2376/7294 cut-off events. [2022-11-20 10:45:23,616 INFO L131 PetriNetUnfolder]: For 180823/180823 co-relation queries the response was YES. [2022-11-20 10:45:23,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62932 conditions, 7294 events. 2376/7294 cut-off events. For 180823/180823 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 74229 event pairs, 64 based on Foata normal form. 43/7299 useless extension candidates. Maximal degree in co-relation 62808. Up to 1157 conditions per place. [2022-11-20 10:45:23,792 INFO L137 encePairwiseOnDemand]: 69/82 looper letters, 827 selfloop transitions, 1402 changer transitions 25/2299 dead transitions. [2022-11-20 10:45:23,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 2299 transitions, 52698 flow [2022-11-20 10:45:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-20 10:45:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-11-20 10:45:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4088 transitions. [2022-11-20 10:45:23,801 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7440844557699309 [2022-11-20 10:45:23,802 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4088 transitions. [2022-11-20 10:45:23,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4088 transitions. [2022-11-20 10:45:23,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:45:23,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4088 transitions. [2022-11-20 10:45:23,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 61.014925373134325) internal successors, (4088), 67 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:23,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:23,825 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 82.0) internal successors, (5576), 68 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:23,825 INFO L175 Difference]: Start difference. First operand has 484 places, 1527 transitions, 32213 flow. Second operand 67 states and 4088 transitions. [2022-11-20 10:45:23,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 2299 transitions, 52698 flow [2022-11-20 10:45:26,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 2299 transitions, 50928 flow, removed 145 selfloop flow, removed 26 redundant places. [2022-11-20 10:45:26,556 INFO L231 Difference]: Finished difference. Result has 549 places, 2042 transitions, 47423 flow [2022-11-20 10:45:26,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=30908, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=943, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=47423, PETRI_PLACES=549, PETRI_TRANSITIONS=2042} [2022-11-20 10:45:26,559 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 477 predicate places. [2022-11-20 10:45:26,559 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 2042 transitions, 47423 flow [2022-11-20 10:45:26,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.285714285714285) internal successors, (1245), 21 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:26,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:45:26,560 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:45:26,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:26,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 10:45:26,765 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:45:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1262030765, now seen corresponding path program 12 times [2022-11-20 10:45:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:45:26,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660606631] [2022-11-20 10:45:26,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:45:26,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:45:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:26,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:45:26,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660606631] [2022-11-20 10:45:26,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660606631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:45:26,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857970949] [2022-11-20 10:45:26,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 10:45:26,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:26,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:45:26,959 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:45:26,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:45:27,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-20 10:45:27,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:27,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:45:27,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:27,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:27,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857970949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:27,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:45:27,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-20 10:45:27,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913051338] [2022-11-20 10:45:27,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:27,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:45:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:45:27,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:45:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:45:27,479 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:45:27,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 2042 transitions, 47423 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:27,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:45:27,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:45:27,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:45:34,785 INFO L130 PetriNetUnfolder]: 2715/8217 cut-off events. [2022-11-20 10:45:34,786 INFO L131 PetriNetUnfolder]: For 257421/257426 co-relation queries the response was YES. [2022-11-20 10:45:34,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78435 conditions, 8217 events. 2715/8217 cut-off events. For 257421/257426 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 84796 event pairs, 190 based on Foata normal form. 1/8177 useless extension candidates. Maximal degree in co-relation 78287. Up to 3460 conditions per place. [2022-11-20 10:45:34,995 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1844 selfloop transitions, 556 changer transitions 8/2453 dead transitions. [2022-11-20 10:45:34,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 2453 transitions, 61966 flow [2022-11-20 10:45:34,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 10:45:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-20 10:45:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1655 transitions. [2022-11-20 10:45:35,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7475158084914183 [2022-11-20 10:45:35,005 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1655 transitions. [2022-11-20 10:45:35,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1655 transitions. [2022-11-20 10:45:35,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:45:35,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1655 transitions. [2022-11-20 10:45:35,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 61.2962962962963) internal successors, (1655), 27 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:35,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:35,014 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 82.0) internal successors, (2296), 28 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:35,015 INFO L175 Difference]: Start difference. First operand has 549 places, 2042 transitions, 47423 flow. Second operand 27 states and 1655 transitions. [2022-11-20 10:45:35,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 2453 transitions, 61966 flow [2022-11-20 10:45:39,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 2453 transitions, 59646 flow, removed 931 selfloop flow, removed 19 redundant places. [2022-11-20 10:45:39,598 INFO L231 Difference]: Finished difference. Result has 567 places, 2202 transitions, 51625 flow [2022-11-20 10:45:39,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=45821, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=51625, PETRI_PLACES=567, PETRI_TRANSITIONS=2202} [2022-11-20 10:45:39,601 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 495 predicate places. [2022-11-20 10:45:39,601 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 2202 transitions, 51625 flow [2022-11-20 10:45:39,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:39,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:45:39,602 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:45:39,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-20 10:45:39,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:45:39,808 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:45:39,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:39,808 INFO L85 PathProgramCache]: Analyzing trace with hash 125780809, now seen corresponding path program 13 times [2022-11-20 10:45:39,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:45:39,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471167444] [2022-11-20 10:45:39,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:45:39,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:45:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:40,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:45:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471167444] [2022-11-20 10:45:40,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471167444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:45:40,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245621461] [2022-11-20 10:45:40,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 10:45:40,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:40,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:45:40,019 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:45:40,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 10:45:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:40,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:45:40,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:40,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:40,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245621461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:40,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:45:40,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-20 10:45:40,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863142650] [2022-11-20 10:45:40,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:40,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:45:40,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:45:40,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:45:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:45:40,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:45:40,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 2202 transitions, 51625 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:40,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:45:40,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:45:40,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:45:47,958 INFO L130 PetriNetUnfolder]: 2722/8226 cut-off events. [2022-11-20 10:45:47,959 INFO L131 PetriNetUnfolder]: For 237738/237743 co-relation queries the response was YES. [2022-11-20 10:45:48,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76710 conditions, 8226 events. 2722/8226 cut-off events. For 237738/237743 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 84955 event pairs, 142 based on Foata normal form. 1/8189 useless extension candidates. Maximal degree in co-relation 76550. Up to 3982 conditions per place. [2022-11-20 10:45:48,223 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1775 selfloop transitions, 426 changer transitions 6/2252 dead transitions. [2022-11-20 10:45:48,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 2252 transitions, 56992 flow [2022-11-20 10:45:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 10:45:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 10:45:48,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1101 transitions. [2022-11-20 10:45:48,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7459349593495935 [2022-11-20 10:45:48,225 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1101 transitions. [2022-11-20 10:45:48,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1101 transitions. [2022-11-20 10:45:48,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:45:48,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1101 transitions. [2022-11-20 10:45:48,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.166666666666664) internal successors, (1101), 18 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:48,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:48,231 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:48,231 INFO L175 Difference]: Start difference. First operand has 567 places, 2202 transitions, 51625 flow. Second operand 18 states and 1101 transitions. [2022-11-20 10:45:48,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 2252 transitions, 56992 flow [2022-11-20 10:45:53,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 2252 transitions, 56894 flow, removed 14 selfloop flow, removed 11 redundant places. [2022-11-20 10:45:53,116 INFO L231 Difference]: Finished difference. Result has 575 places, 2213 transitions, 52882 flow [2022-11-20 10:45:53,117 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=51527, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=52882, PETRI_PLACES=575, PETRI_TRANSITIONS=2213} [2022-11-20 10:45:53,118 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 503 predicate places. [2022-11-20 10:45:53,118 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 2213 transitions, 52882 flow [2022-11-20 10:45:53,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:53,118 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:45:53,119 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:45:53,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 10:45:53,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:53,319 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:45:53,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:45:53,320 INFO L85 PathProgramCache]: Analyzing trace with hash -534521583, now seen corresponding path program 14 times [2022-11-20 10:45:53,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:45:53,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468213040] [2022-11-20 10:45:53,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:45:53,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:45:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:45:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:53,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:45:53,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468213040] [2022-11-20 10:45:53,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468213040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:45:53,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448414258] [2022-11-20 10:45:53,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:45:53,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:45:53,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:45:53,573 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:45:53,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 10:45:53,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:45:53,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:45:53,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:45:53,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:45:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:53,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:45:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:45:54,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448414258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:45:54,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:45:54,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-11-20 10:45:54,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177743294] [2022-11-20 10:45:54,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:45:54,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 10:45:54,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:45:54,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 10:45:54,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2022-11-20 10:45:54,061 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:45:54,063 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 2213 transitions, 52882 flow. Second operand has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:45:54,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:45:54,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:45:54,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:08,607 INFO L130 PetriNetUnfolder]: 3585/11345 cut-off events. [2022-11-20 10:46:08,608 INFO L131 PetriNetUnfolder]: For 345101/345106 co-relation queries the response was YES. [2022-11-20 10:46:08,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104867 conditions, 11345 events. 3585/11345 cut-off events. For 345101/345106 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 126053 event pairs, 185 based on Foata normal form. 9/11279 useless extension candidates. Maximal degree in co-relation 104704. Up to 2762 conditions per place. [2022-11-20 10:46:08,978 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1838 selfloop transitions, 1380 changer transitions 6/3269 dead transitions. [2022-11-20 10:46:08,978 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 3269 transitions, 84360 flow [2022-11-20 10:46:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-20 10:46:08,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-20 10:46:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3424 transitions. [2022-11-20 10:46:08,983 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7456445993031359 [2022-11-20 10:46:08,983 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3424 transitions. [2022-11-20 10:46:08,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3424 transitions. [2022-11-20 10:46:08,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:08,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3424 transitions. [2022-11-20 10:46:08,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 61.142857142857146) internal successors, (3424), 56 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:08,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 82.0) internal successors, (4674), 57 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:08,998 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 82.0) internal successors, (4674), 57 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:08,998 INFO L175 Difference]: Start difference. First operand has 575 places, 2213 transitions, 52882 flow. Second operand 56 states and 3424 transitions. [2022-11-20 10:46:08,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 3269 transitions, 84360 flow [2022-11-20 10:46:15,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 3269 transitions, 84114 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-11-20 10:46:15,952 INFO L231 Difference]: Finished difference. Result has 642 places, 2812 transitions, 73411 flow [2022-11-20 10:46:15,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=52691, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=837, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=73411, PETRI_PLACES=642, PETRI_TRANSITIONS=2812} [2022-11-20 10:46:15,953 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 570 predicate places. [2022-11-20 10:46:15,954 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 2812 transitions, 73411 flow [2022-11-20 10:46:15,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 59.291666666666664) internal successors, (1423), 24 states have internal predecessors, (1423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:15,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 10:46:15,955 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 10:46:15,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 10:46:16,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 10:46:16,160 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-20 10:46:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:46:16,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1907780337, now seen corresponding path program 15 times [2022-11-20 10:46:16,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:46:16,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12014945] [2022-11-20 10:46:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:46:16,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:46:16,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:46:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:46:16,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12014945] [2022-11-20 10:46:16,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12014945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:46:16,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730340358] [2022-11-20 10:46:16,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:46:16,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:46:16,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:46:16,343 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:46:16,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17609fd2-9fce-45cb-b1b8-1bf70160b5c6/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 10:46:16,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 10:46:16,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:46:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:46:16,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:46:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:16,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:46:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:46:16,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730340358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:46:16,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:46:16,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-11-20 10:46:16,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894181574] [2022-11-20 10:46:16,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:46:16,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 10:46:16,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:46:16,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 10:46:16,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-11-20 10:46:16,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 82 [2022-11-20 10:46:16,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 2812 transitions, 73411 flow. Second operand has 23 states, 23 states have (on average 59.34782608695652) internal successors, (1365), 23 states have internal predecessors, (1365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:16,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 10:46:16,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 82 [2022-11-20 10:46:16,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 10:46:31,891 INFO L130 PetriNetUnfolder]: 3943/12614 cut-off events. [2022-11-20 10:46:31,891 INFO L131 PetriNetUnfolder]: For 440675/440680 co-relation queries the response was YES. [2022-11-20 10:46:32,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122563 conditions, 12614 events. 3943/12614 cut-off events. For 440675/440680 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 143304 event pairs, 199 based on Foata normal form. 22/12549 useless extension candidates. Maximal degree in co-relation 122377. Up to 1914 conditions per place. [2022-11-20 10:46:32,364 INFO L137 encePairwiseOnDemand]: 70/82 looper letters, 1445 selfloop transitions, 1802 changer transitions 10/3302 dead transitions. [2022-11-20 10:46:32,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 680 places, 3302 transitions, 91990 flow [2022-11-20 10:46:32,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-20 10:46:32,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2022-11-20 10:46:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2661 transitions. [2022-11-20 10:46:32,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7546795235394215 [2022-11-20 10:46:32,368 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2661 transitions. [2022-11-20 10:46:32,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2661 transitions. [2022-11-20 10:46:32,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 10:46:32,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2661 transitions. [2022-11-20 10:46:32,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 61.883720930232556) internal successors, (2661), 43 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:32,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:32,379 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 82.0) internal successors, (3608), 44 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:46:32,379 INFO L175 Difference]: Start difference. First operand has 642 places, 2812 transitions, 73411 flow. Second operand 43 states and 2661 transitions. [2022-11-20 10:46:32,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 680 places, 3302 transitions, 91990 flow