./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8 --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 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 --- 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-e04fb08 [2022-11-16 11:05:51,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:05:51,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:05:51,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:05:51,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:05:51,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:05:51,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:05:51,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:05:51,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:05:51,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:05:51,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:05:51,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:05:51,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:05:51,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:05:51,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:05:51,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:05:51,968 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:05:51,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:05:51,975 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:05:51,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:05:51,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:05:51,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:05:51,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:05:51,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:05:51,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:05:52,006 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:05:52,007 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:05:52,008 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:05:52,008 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:05:52,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:05:52,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:05:52,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:05:52,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:05:52,014 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:05:52,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:05:52,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:05:52,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:05:52,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:05:52,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:05:52,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:05:52,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:05:52,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:05:52,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:05:52,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:05:52,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:05:52,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:05:52,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:05:52,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:05:52,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:05:52,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:05:52,075 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:05:52,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:05:52,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:05:52,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:05:52,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:05:52,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:05:52,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:05:52,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:05:52,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:05:52,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:05:52,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:05:52,079 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:05:52,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:05:52,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:05:52,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:05:52,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:05:52,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:05:52,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:05:52,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:05:52,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:05:52,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:05:52,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:05:52,082 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:05:52,082 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:05:52,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:05:52,083 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_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c615a04683f0f8050243ec529c03e20511a5c93f5e823175650f11e9fefc562 [2022-11-16 11:05:52,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:05:52,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:05:52,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:05:52,415 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:05:52,416 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:05:52,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-16 11:05:52,515 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/data/012860110/941cf5b393f64d9ab4e7caabd0287e38/FLAGbe52d04c8 [2022-11-16 11:05:53,103 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:05:53,104 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c [2022-11-16 11:05:53,111 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/data/012860110/941cf5b393f64d9ab4e7caabd0287e38/FLAGbe52d04c8 [2022-11-16 11:05:53,448 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/data/012860110/941cf5b393f64d9ab4e7caabd0287e38 [2022-11-16 11:05:53,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:05:53,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:05:53,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:05:53,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:05:53,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:05:53,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,469 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e43e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53, skipping insertion in model container [2022-11-16 11:05:53,469 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:05:53,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:05:53,683 WARN L229 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_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-16 11:05:53,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:05:53,709 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:05:53,729 WARN L229 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_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/sv-benchmarks/c/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2022-11-16 11:05:53,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:05:53,749 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:05:53,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53 WrapperNode [2022-11-16 11:05:53,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:05:53,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:05:53,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:05:53,752 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:05:53,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,806 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 138 [2022-11-16 11:05:53,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:05:53,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:05:53,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:05:53,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:05:53,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,847 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:05:53,853 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:05:53,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:05:53,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:05:53,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (1/1) ... [2022-11-16 11:05:53,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:05:53,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:53,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:05:53,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:05:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:05:53,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:05:53,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:05:53,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:05:53,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:05:53,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:05:53,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:05:53,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:05:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:05:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:05:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:05:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:05:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:05:53,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:05:53,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:05:53,947 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:05:54,125 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:05:54,127 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:05:54,519 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:05:54,701 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:05:54,701 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:05:54,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:05:54 BoogieIcfgContainer [2022-11-16 11:05:54,704 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:05:54,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:05:54,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:05:54,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:05:54,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:05:53" (1/3) ... [2022-11-16 11:05:54,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b753da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:05:54, skipping insertion in model container [2022-11-16 11:05:54,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:05:53" (2/3) ... [2022-11-16 11:05:54,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b753da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:05:54, skipping insertion in model container [2022-11-16 11:05:54,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:05:54" (3/3) ... [2022-11-16 11:05:54,715 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2022-11-16 11:05:54,730 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:05:54,742 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:05:54,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:05:54,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:05:54,839 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:05:54,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 250 flow [2022-11-16 11:05:54,978 INFO L130 PetriNetUnfolder]: 9/115 cut-off events. [2022-11-16 11:05:54,978 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:05:54,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 115 events. 9/115 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/105 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2022-11-16 11:05:54,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 250 flow [2022-11-16 11:05:54,995 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 106 transitions, 224 flow [2022-11-16 11:05:55,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:05:55,035 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;@44f254e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:05:55,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 11:05:55,098 INFO L130 PetriNetUnfolder]: 9/105 cut-off events. [2022-11-16 11:05:55,106 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:05:55,106 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:55,107 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:55,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:05:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:55,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1955015990, now seen corresponding path program 1 times [2022-11-16 11:05:55,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:55,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304847573] [2022-11-16 11:05:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:55,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:55,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:55,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304847573] [2022-11-16 11:05:55,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304847573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:55,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:55,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:05:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843569670] [2022-11-16 11:05:55,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:55,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:05:55,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:55,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:05:55,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:05:55,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 117 [2022-11-16 11:05:55,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 224 flow. Second operand has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:55,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:55,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 117 [2022-11-16 11:05:55,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:55,564 INFO L130 PetriNetUnfolder]: 12/133 cut-off events. [2022-11-16 11:05:55,565 INFO L131 PetriNetUnfolder]: For 21/22 co-relation queries the response was YES. [2022-11-16 11:05:55,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 133 events. 12/133 cut-off events. For 21/22 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 167 event pairs, 3 based on Foata normal form. 13/135 useless extension candidates. Maximal degree in co-relation 78. Up to 19 conditions per place. [2022-11-16 11:05:55,567 INFO L137 encePairwiseOnDemand]: 111/117 looper letters, 6 selfloop transitions, 0 changer transitions 3/100 dead transitions. [2022-11-16 11:05:55,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 224 flow [2022-11-16 11:05:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:05:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 11:05:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 220 transitions. [2022-11-16 11:05:55,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9401709401709402 [2022-11-16 11:05:55,583 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 220 transitions. [2022-11-16 11:05:55,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 220 transitions. [2022-11-16 11:05:55,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:55,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 220 transitions. [2022-11-16 11:05:55,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 110.0) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:55,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:55,597 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:55,599 INFO L175 Difference]: Start difference. First operand has 104 places, 106 transitions, 224 flow. Second operand 2 states and 220 transitions. [2022-11-16 11:05:55,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 224 flow [2022-11-16 11:05:55,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 100 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:05:55,607 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 198 flow [2022-11-16 11:05:55,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2022-11-16 11:05:55,614 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, -3 predicate places. [2022-11-16 11:05:55,614 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 198 flow [2022-11-16 11:05:55,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:55,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:55,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:55,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:05:55,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:05:55,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1204015377, now seen corresponding path program 1 times [2022-11-16 11:05:55,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:55,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043203740] [2022-11-16 11:05:55,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:55,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:56,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:56,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043203740] [2022-11-16 11:05:56,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043203740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:56,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:56,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:05:56,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542874238] [2022-11-16 11:05:56,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:56,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:05:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:05:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:05:56,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 117 [2022-11-16 11:05:56,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:56,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 117 [2022-11-16 11:05:56,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:56,169 INFO L130 PetriNetUnfolder]: 13/150 cut-off events. [2022-11-16 11:05:56,170 INFO L131 PetriNetUnfolder]: For 7/8 co-relation queries the response was YES. [2022-11-16 11:05:56,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 150 events. 13/150 cut-off events. For 7/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 192. Up to 24 conditions per place. [2022-11-16 11:05:56,172 INFO L137 encePairwiseOnDemand]: 111/117 looper letters, 20 selfloop transitions, 3 changer transitions 4/105 dead transitions. [2022-11-16 11:05:56,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 105 transitions, 271 flow [2022-11-16 11:05:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:05:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:05:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 468 transitions. [2022-11-16 11:05:56,176 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8 [2022-11-16 11:05:56,176 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 468 transitions. [2022-11-16 11:05:56,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 468 transitions. [2022-11-16 11:05:56,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:56,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 468 transitions. [2022-11-16 11:05:56,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,190 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,191 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 198 flow. Second operand 5 states and 468 transitions. [2022-11-16 11:05:56,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 105 transitions, 271 flow [2022-11-16 11:05:56,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 105 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 11:05:56,196 INFO L231 Difference]: Finished difference. Result has 105 places, 99 transitions, 221 flow [2022-11-16 11:05:56,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2022-11-16 11:05:56,196 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2022-11-16 11:05:56,197 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 221 flow [2022-11-16 11:05:56,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 91.4) internal successors, (457), 5 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:56,198 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:56,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:05:56,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:05:56,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1430434687, now seen corresponding path program 1 times [2022-11-16 11:05:56,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:56,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139454954] [2022-11-16 11:05:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:56,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:56,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:56,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139454954] [2022-11-16 11:05:56,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139454954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:56,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:56,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:05:56,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204566294] [2022-11-16 11:05:56,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:56,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:05:56,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:56,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:05:56,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:05:56,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-11-16 11:05:56,590 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 221 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:56,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-11-16 11:05:56,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:56,923 INFO L130 PetriNetUnfolder]: 83/368 cut-off events. [2022-11-16 11:05:56,924 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-16 11:05:56,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 368 events. 83/368 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1535 event pairs, 34 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 615. Up to 125 conditions per place. [2022-11-16 11:05:56,931 INFO L137 encePairwiseOnDemand]: 108/117 looper letters, 41 selfloop transitions, 8 changer transitions 0/119 dead transitions. [2022-11-16 11:05:56,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 119 transitions, 374 flow [2022-11-16 11:05:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:05:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:05:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 710 transitions. [2022-11-16 11:05:56,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7585470085470085 [2022-11-16 11:05:56,939 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 710 transitions. [2022-11-16 11:05:56,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 710 transitions. [2022-11-16 11:05:56,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:56,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 710 transitions. [2022-11-16 11:05:56,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.75) internal successors, (710), 8 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,949 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,949 INFO L175 Difference]: Start difference. First operand has 105 places, 99 transitions, 221 flow. Second operand 8 states and 710 transitions. [2022-11-16 11:05:56,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 119 transitions, 374 flow [2022-11-16 11:05:56,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 119 transitions, 365 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-16 11:05:56,956 INFO L231 Difference]: Finished difference. Result has 110 places, 102 transitions, 250 flow [2022-11-16 11:05:56,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=110, PETRI_TRANSITIONS=102} [2022-11-16 11:05:56,959 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 6 predicate places. [2022-11-16 11:05:56,959 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 102 transitions, 250 flow [2022-11-16 11:05:56,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:56,960 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:56,961 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:56,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:05:56,961 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:05:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:56,962 INFO L85 PathProgramCache]: Analyzing trace with hash -74132365, now seen corresponding path program 1 times [2022-11-16 11:05:56,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:56,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184630303] [2022-11-16 11:05:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:56,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:05:57,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:57,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184630303] [2022-11-16 11:05:57,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184630303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:05:57,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:05:57,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:05:57,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960923959] [2022-11-16 11:05:57,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:57,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:05:57,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:57,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:05:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:05:57,278 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-11-16 11:05:57,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 102 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:57,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:57,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-11-16 11:05:57,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:57,587 INFO L130 PetriNetUnfolder]: 67/286 cut-off events. [2022-11-16 11:05:57,587 INFO L131 PetriNetUnfolder]: For 51/54 co-relation queries the response was YES. [2022-11-16 11:05:57,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 286 events. 67/286 cut-off events. For 51/54 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1006 event pairs, 36 based on Foata normal form. 3/268 useless extension candidates. Maximal degree in co-relation 502. Up to 124 conditions per place. [2022-11-16 11:05:57,592 INFO L137 encePairwiseOnDemand]: 108/117 looper letters, 27 selfloop transitions, 6 changer transitions 11/114 dead transitions. [2022-11-16 11:05:57,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 114 transitions, 365 flow [2022-11-16 11:05:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:05:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:05:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 706 transitions. [2022-11-16 11:05:57,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7542735042735043 [2022-11-16 11:05:57,596 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 706 transitions. [2022-11-16 11:05:57,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 706 transitions. [2022-11-16 11:05:57,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:57,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 706 transitions. [2022-11-16 11:05:57,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 88.25) internal successors, (706), 8 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:57,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:57,610 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 117.0) internal successors, (1053), 9 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:57,610 INFO L175 Difference]: Start difference. First operand has 110 places, 102 transitions, 250 flow. Second operand 8 states and 706 transitions. [2022-11-16 11:05:57,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 114 transitions, 365 flow [2022-11-16 11:05:57,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 114 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:05:57,616 INFO L231 Difference]: Finished difference. Result has 115 places, 100 transitions, 244 flow [2022-11-16 11:05:57,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=244, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2022-11-16 11:05:57,617 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-11-16 11:05:57,617 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 244 flow [2022-11-16 11:05:57,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.0) internal successors, (602), 7 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:57,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:57,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:57,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:05:57,619 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:05:57,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:57,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1474470436, now seen corresponding path program 1 times [2022-11-16 11:05:57,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:57,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337413819] [2022-11-16 11:05:57,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:57,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:57,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:57,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337413819] [2022-11-16 11:05:57,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337413819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:57,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394972838] [2022-11-16 11:05:57,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:57,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:57,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:57,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:57,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:05:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:58,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:05:58,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:58,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:58,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394972838] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:58,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:05:58,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-11-16 11:05:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880221399] [2022-11-16 11:05:58,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:58,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:05:58,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:58,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:05:58,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:05:58,593 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-11-16 11:05:58,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 244 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:58,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-11-16 11:05:58,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:58,755 INFO L130 PetriNetUnfolder]: 58/226 cut-off events. [2022-11-16 11:05:58,755 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-11-16 11:05:58,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 226 events. 58/226 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 635 event pairs, 13 based on Foata normal form. 8/229 useless extension candidates. Maximal degree in co-relation 432. Up to 65 conditions per place. [2022-11-16 11:05:58,758 INFO L137 encePairwiseOnDemand]: 109/117 looper letters, 30 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2022-11-16 11:05:58,758 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 107 transitions, 341 flow [2022-11-16 11:05:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:05:58,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:05:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-11-16 11:05:58,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2022-11-16 11:05:58,761 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-11-16 11:05:58,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-11-16 11:05:58,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:58,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-11-16 11:05:58,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,767 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,767 INFO L175 Difference]: Start difference. First operand has 115 places, 100 transitions, 244 flow. Second operand 7 states and 615 transitions. [2022-11-16 11:05:58,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 107 transitions, 341 flow [2022-11-16 11:05:58,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 107 transitions, 315 flow, removed 7 selfloop flow, removed 9 redundant places. [2022-11-16 11:05:58,772 INFO L231 Difference]: Finished difference. Result has 111 places, 102 transitions, 255 flow [2022-11-16 11:05:58,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2022-11-16 11:05:58,777 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 7 predicate places. [2022-11-16 11:05:58,777 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 255 flow [2022-11-16 11:05:58,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:58,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:58,778 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:58,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:05:58,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:58,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:05:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:05:58,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1695729060, now seen corresponding path program 1 times [2022-11-16 11:05:58,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:05:58,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171259752] [2022-11-16 11:05:58,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:58,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:05:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:59,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:05:59,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171259752] [2022-11-16 11:05:59,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171259752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:59,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217633243] [2022-11-16 11:05:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:05:59,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:05:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:05:59,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:05:59,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:05:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:05:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:05:59,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:05:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:59,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:05:59,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:05:59,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217633243] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:05:59,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:05:59,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-11-16 11:05:59,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626471616] [2022-11-16 11:05:59,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:05:59,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:05:59,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:05:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:05:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:05:59,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 117 [2022-11-16 11:05:59,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:59,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:05:59,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 117 [2022-11-16 11:05:59,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:05:59,842 INFO L130 PetriNetUnfolder]: 46/209 cut-off events. [2022-11-16 11:05:59,842 INFO L131 PetriNetUnfolder]: For 65/80 co-relation queries the response was YES. [2022-11-16 11:05:59,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 209 events. 46/209 cut-off events. For 65/80 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 502 event pairs, 9 based on Foata normal form. 15/211 useless extension candidates. Maximal degree in co-relation 397. Up to 54 conditions per place. [2022-11-16 11:05:59,845 INFO L137 encePairwiseOnDemand]: 109/117 looper letters, 32 selfloop transitions, 7 changer transitions 0/109 dead transitions. [2022-11-16 11:05:59,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 360 flow [2022-11-16 11:05:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:05:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:05:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 615 transitions. [2022-11-16 11:05:59,849 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7509157509157509 [2022-11-16 11:05:59,853 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 615 transitions. [2022-11-16 11:05:59,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 615 transitions. [2022-11-16 11:05:59,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:05:59,854 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 615 transitions. [2022-11-16 11:05:59,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 87.85714285714286) internal successors, (615), 7 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:59,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:59,858 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 117.0) internal successors, (936), 8 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:59,859 INFO L175 Difference]: Start difference. First operand has 111 places, 102 transitions, 255 flow. Second operand 7 states and 615 transitions. [2022-11-16 11:05:59,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 360 flow [2022-11-16 11:05:59,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 109 transitions, 351 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:05:59,866 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 274 flow [2022-11-16 11:05:59,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=274, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2022-11-16 11:05:59,869 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-11-16 11:05:59,869 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 274 flow [2022-11-16 11:05:59,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 86.28571428571429) internal successors, (604), 7 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:05:59,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:05:59,870 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:05:59,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:00,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:00,085 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash -847867616, now seen corresponding path program 1 times [2022-11-16 11:06:00,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:00,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341463824] [2022-11-16 11:06:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:00,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:01,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:01,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341463824] [2022-11-16 11:06:01,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341463824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:01,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707488112] [2022-11-16 11:06:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:01,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:01,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:01,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:01,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:06:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:01,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 11:06:01,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:01,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:01,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:06:01,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 18 [2022-11-16 11:06:01,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:01,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707488112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:01,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:01,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 8] total 17 [2022-11-16 11:06:01,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622773354] [2022-11-16 11:06:01,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:01,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:06:01,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:01,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:06:01,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:06:01,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 117 [2022-11-16 11:06:01,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 274 flow. Second operand has 17 states, 17 states have (on average 64.11764705882354) internal successors, (1090), 17 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:01,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:01,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 117 [2022-11-16 11:06:01,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:02,545 INFO L130 PetriNetUnfolder]: 325/771 cut-off events. [2022-11-16 11:06:02,545 INFO L131 PetriNetUnfolder]: For 502/502 co-relation queries the response was YES. [2022-11-16 11:06:02,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1856 conditions, 771 events. 325/771 cut-off events. For 502/502 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3847 event pairs, 96 based on Foata normal form. 1/761 useless extension candidates. Maximal degree in co-relation 1845. Up to 326 conditions per place. [2022-11-16 11:06:02,552 INFO L137 encePairwiseOnDemand]: 100/117 looper letters, 79 selfloop transitions, 25 changer transitions 4/160 dead transitions. [2022-11-16 11:06:02,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 693 flow [2022-11-16 11:06:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:06:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-16 11:06:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1247 transitions. [2022-11-16 11:06:02,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5609536662168241 [2022-11-16 11:06:02,557 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1247 transitions. [2022-11-16 11:06:02,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1247 transitions. [2022-11-16 11:06:02,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:02,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1247 transitions. [2022-11-16 11:06:02,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.63157894736842) internal successors, (1247), 19 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:02,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 117.0) internal successors, (2340), 20 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:02,566 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 117.0) internal successors, (2340), 20 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:02,567 INFO L175 Difference]: Start difference. First operand has 115 places, 103 transitions, 274 flow. Second operand 19 states and 1247 transitions. [2022-11-16 11:06:02,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 693 flow [2022-11-16 11:06:02,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 160 transitions, 675 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:06:02,572 INFO L231 Difference]: Finished difference. Result has 135 places, 118 transitions, 417 flow [2022-11-16 11:06:02,573 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=417, PETRI_PLACES=135, PETRI_TRANSITIONS=118} [2022-11-16 11:06:02,573 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 31 predicate places. [2022-11-16 11:06:02,574 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 118 transitions, 417 flow [2022-11-16 11:06:02,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.11764705882354) internal successors, (1090), 17 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:02,575 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:02,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:02,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:06:02,782 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:02,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash -979985588, now seen corresponding path program 2 times [2022-11-16 11:06:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:02,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729540959] [2022-11-16 11:06:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:02,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:04,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:04,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729540959] [2022-11-16 11:06:04,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729540959] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:04,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79682183] [2022-11-16 11:06:04,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:04,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:04,459 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:04,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:06:04,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:06:04,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:04,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:06:04,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:05,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:05,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:06:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:05,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:05,566 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_137 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_137) c_~A~0.base) c_~A~0.offset) c_~counter~0)) is different from false [2022-11-16 11:06:05,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:06:05,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-11-16 11:06:05,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-16 11:06:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:06,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79682183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:06,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:06,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 38 [2022-11-16 11:06:06,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647024966] [2022-11-16 11:06:06,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:06,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:06:06,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:06:06,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1205, Unknown=1, NotChecked=70, Total=1406 [2022-11-16 11:06:06,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 117 [2022-11-16 11:06:06,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 118 transitions, 417 flow. Second operand has 38 states, 38 states have (on average 48.421052631578945) internal successors, (1840), 38 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:06,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:06,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 117 [2022-11-16 11:06:06,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:08,444 INFO L130 PetriNetUnfolder]: 536/1189 cut-off events. [2022-11-16 11:06:08,444 INFO L131 PetriNetUnfolder]: For 1368/1368 co-relation queries the response was YES. [2022-11-16 11:06:08,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 1189 events. 536/1189 cut-off events. For 1368/1368 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6931 event pairs, 52 based on Foata normal form. 1/1177 useless extension candidates. Maximal degree in co-relation 3273. Up to 526 conditions per place. [2022-11-16 11:06:08,455 INFO L137 encePairwiseOnDemand]: 93/117 looper letters, 108 selfloop transitions, 60 changer transitions 4/211 dead transitions. [2022-11-16 11:06:08,455 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 211 transitions, 1141 flow [2022-11-16 11:06:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:06:08,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 11:06:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1370 transitions. [2022-11-16 11:06:08,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4336815447926559 [2022-11-16 11:06:08,461 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1370 transitions. [2022-11-16 11:06:08,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1370 transitions. [2022-11-16 11:06:08,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:08,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1370 transitions. [2022-11-16 11:06:08,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 50.74074074074074) internal successors, (1370), 27 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:08,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 117.0) internal successors, (3276), 28 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:08,494 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 117.0) internal successors, (3276), 28 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:08,495 INFO L175 Difference]: Start difference. First operand has 135 places, 118 transitions, 417 flow. Second operand 27 states and 1370 transitions. [2022-11-16 11:06:08,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 211 transitions, 1141 flow [2022-11-16 11:06:08,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 211 transitions, 1065 flow, removed 24 selfloop flow, removed 11 redundant places. [2022-11-16 11:06:08,505 INFO L231 Difference]: Finished difference. Result has 159 places, 157 transitions, 743 flow [2022-11-16 11:06:08,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=743, PETRI_PLACES=159, PETRI_TRANSITIONS=157} [2022-11-16 11:06:08,508 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 55 predicate places. [2022-11-16 11:06:08,508 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 157 transitions, 743 flow [2022-11-16 11:06:08,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 48.421052631578945) internal successors, (1840), 38 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:08,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:08,509 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:08,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:08,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 11:06:08,715 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash -636181328, now seen corresponding path program 3 times [2022-11-16 11:06:08,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:08,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146726592] [2022-11-16 11:06:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:08,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:10,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:10,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146726592] [2022-11-16 11:06:10,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146726592] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:10,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473842496] [2022-11-16 11:06:10,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:10,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:10,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:10,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:10,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:06:10,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:06:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:10,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 11:06:10,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:10,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:11,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:06:11,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 16 [2022-11-16 11:06:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:11,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473842496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:11,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:11,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 8] total 28 [2022-11-16 11:06:11,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806542226] [2022-11-16 11:06:11,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:11,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:06:11,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:11,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:06:11,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:06:11,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-11-16 11:06:11,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 157 transitions, 743 flow. Second operand has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:11,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:11,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-11-16 11:06:11,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:12,510 INFO L130 PetriNetUnfolder]: 781/1704 cut-off events. [2022-11-16 11:06:12,510 INFO L131 PetriNetUnfolder]: For 3768/3812 co-relation queries the response was YES. [2022-11-16 11:06:12,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5864 conditions, 1704 events. 781/1704 cut-off events. For 3768/3812 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11103 event pairs, 156 based on Foata normal form. 15/1711 useless extension candidates. Maximal degree in co-relation 5837. Up to 677 conditions per place. [2022-11-16 11:06:12,526 INFO L137 encePairwiseOnDemand]: 95/117 looper letters, 129 selfloop transitions, 71 changer transitions 4/246 dead transitions. [2022-11-16 11:06:12,526 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 246 transitions, 1664 flow [2022-11-16 11:06:12,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:06:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-16 11:06:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1388 transitions. [2022-11-16 11:06:12,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45627876397107164 [2022-11-16 11:06:12,532 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1388 transitions. [2022-11-16 11:06:12,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1388 transitions. [2022-11-16 11:06:12,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:12,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1388 transitions. [2022-11-16 11:06:12,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 53.38461538461539) internal successors, (1388), 26 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:12,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:12,543 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:12,543 INFO L175 Difference]: Start difference. First operand has 159 places, 157 transitions, 743 flow. Second operand 26 states and 1388 transitions. [2022-11-16 11:06:12,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 246 transitions, 1664 flow [2022-11-16 11:06:12,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 246 transitions, 1596 flow, removed 20 selfloop flow, removed 13 redundant places. [2022-11-16 11:06:12,558 INFO L231 Difference]: Finished difference. Result has 174 places, 184 transitions, 1089 flow [2022-11-16 11:06:12,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1089, PETRI_PLACES=174, PETRI_TRANSITIONS=184} [2022-11-16 11:06:12,559 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 70 predicate places. [2022-11-16 11:06:12,559 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 184 transitions, 1089 flow [2022-11-16 11:06:12,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:12,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:12,560 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:12,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 11:06:12,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:12,766 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:12,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash 743741938, now seen corresponding path program 4 times [2022-11-16 11:06:12,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:12,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667679520] [2022-11-16 11:06:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:12,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:14,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667679520] [2022-11-16 11:06:14,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667679520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047065458] [2022-11-16 11:06:14,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:06:14,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:14,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:14,591 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:14,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:06:14,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:06:14,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:14,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:06:14,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:15,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:06:15,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:06:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:15,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:15,595 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_186 (Array Int Int))) (= c_~counter~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_186) c_~A~0.base) c_~A~0.offset))) is different from false [2022-11-16 11:06:15,649 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:06:15,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2022-11-16 11:06:15,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-16 11:06:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-16 11:06:16,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047065458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:16,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:16,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15, 15] total 45 [2022-11-16 11:06:16,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999629683] [2022-11-16 11:06:16,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:16,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 11:06:16,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:16,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 11:06:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1736, Unknown=1, NotChecked=84, Total=1980 [2022-11-16 11:06:16,184 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-11-16 11:06:16,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 184 transitions, 1089 flow. Second operand has 45 states, 45 states have (on average 44.2) internal successors, (1989), 45 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:16,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:16,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-11-16 11:06:16,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:21,874 INFO L130 PetriNetUnfolder]: 948/2062 cut-off events. [2022-11-16 11:06:21,874 INFO L131 PetriNetUnfolder]: For 5880/5901 co-relation queries the response was YES. [2022-11-16 11:06:21,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7637 conditions, 2062 events. 948/2062 cut-off events. For 5880/5901 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14316 event pairs, 76 based on Foata normal form. 13/2064 useless extension candidates. Maximal degree in co-relation 7607. Up to 451 conditions per place. [2022-11-16 11:06:21,898 INFO L137 encePairwiseOnDemand]: 90/117 looper letters, 139 selfloop transitions, 120 changer transitions 4/297 dead transitions. [2022-11-16 11:06:21,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 297 transitions, 2310 flow [2022-11-16 11:06:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 11:06:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-16 11:06:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1779 transitions. [2022-11-16 11:06:21,903 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3898750821827745 [2022-11-16 11:06:21,903 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 1779 transitions. [2022-11-16 11:06:21,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 1779 transitions. [2022-11-16 11:06:21,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:21,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 1779 transitions. [2022-11-16 11:06:21,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 45.61538461538461) internal successors, (1779), 39 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:21,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:21,918 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 117.0) internal successors, (4680), 40 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:21,918 INFO L175 Difference]: Start difference. First operand has 174 places, 184 transitions, 1089 flow. Second operand 39 states and 1779 transitions. [2022-11-16 11:06:21,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 297 transitions, 2310 flow [2022-11-16 11:06:21,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 297 transitions, 2209 flow, removed 21 selfloop flow, removed 16 redundant places. [2022-11-16 11:06:21,954 INFO L231 Difference]: Finished difference. Result has 200 places, 224 transitions, 1606 flow [2022-11-16 11:06:21,954 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1606, PETRI_PLACES=200, PETRI_TRANSITIONS=224} [2022-11-16 11:06:21,955 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 96 predicate places. [2022-11-16 11:06:21,955 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 224 transitions, 1606 flow [2022-11-16 11:06:21,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 44.2) internal successors, (1989), 45 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:21,956 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:21,957 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:21,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:22,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:06:22,172 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:22,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:22,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1246130652, now seen corresponding path program 5 times [2022-11-16 11:06:22,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:22,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374291937] [2022-11-16 11:06:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:22,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:22,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:22,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374291937] [2022-11-16 11:06:22,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374291937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:22,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261062439] [2022-11-16 11:06:22,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:06:22,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:22,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:22,895 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:22,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:06:23,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:06:23,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:23,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 11:06:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:23,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:06:23,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:06:23,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:06:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:23,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:24,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261062439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:24,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:24,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 27 [2022-11-16 11:06:24,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501251830] [2022-11-16 11:06:24,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:24,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:06:24,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:24,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:06:24,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:06:24,065 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-11-16 11:06:24,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 224 transitions, 1606 flow. Second operand has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:24,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:24,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-11-16 11:06:24,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:25,330 INFO L130 PetriNetUnfolder]: 1063/2331 cut-off events. [2022-11-16 11:06:25,330 INFO L131 PetriNetUnfolder]: For 7944/7983 co-relation queries the response was YES. [2022-11-16 11:06:25,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8982 conditions, 2331 events. 1063/2331 cut-off events. For 7944/7983 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 16806 event pairs, 350 based on Foata normal form. 10/2319 useless extension candidates. Maximal degree in co-relation 8947. Up to 1551 conditions per place. [2022-11-16 11:06:25,362 INFO L137 encePairwiseOnDemand]: 96/117 looper letters, 183 selfloop transitions, 44 changer transitions 4/274 dead transitions. [2022-11-16 11:06:25,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 274 transitions, 2379 flow [2022-11-16 11:06:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:06:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-16 11:06:25,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1173 transitions. [2022-11-16 11:06:25,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4557109557109557 [2022-11-16 11:06:25,366 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1173 transitions. [2022-11-16 11:06:25,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1173 transitions. [2022-11-16 11:06:25,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:25,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1173 transitions. [2022-11-16 11:06:25,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 53.31818181818182) internal successors, (1173), 22 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:25,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:25,375 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 117.0) internal successors, (2691), 23 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:25,375 INFO L175 Difference]: Start difference. First operand has 200 places, 224 transitions, 1606 flow. Second operand 22 states and 1173 transitions. [2022-11-16 11:06:25,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 274 transitions, 2379 flow [2022-11-16 11:06:25,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 274 transitions, 2253 flow, removed 36 selfloop flow, removed 16 redundant places. [2022-11-16 11:06:25,422 INFO L231 Difference]: Finished difference. Result has 208 places, 234 transitions, 1707 flow [2022-11-16 11:06:25,422 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1707, PETRI_PLACES=208, PETRI_TRANSITIONS=234} [2022-11-16 11:06:25,423 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 104 predicate places. [2022-11-16 11:06:25,423 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 234 transitions, 1707 flow [2022-11-16 11:06:25,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 52.22222222222222) internal successors, (1410), 27 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:25,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:25,424 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:25,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:25,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:06:25,630 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:25,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash 919567832, now seen corresponding path program 6 times [2022-11-16 11:06:25,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:25,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425305224] [2022-11-16 11:06:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:25,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:26,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:26,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425305224] [2022-11-16 11:06:26,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425305224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:26,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128675285] [2022-11-16 11:06:26,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:06:26,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:26,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:26,247 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:26,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:06:26,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 11:06:26,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:26,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 11:06:26,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:26,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:26,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:06:26,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 18 [2022-11-16 11:06:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:26,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128675285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:26,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:26,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 8] total 18 [2022-11-16 11:06:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131023976] [2022-11-16 11:06:26,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:26,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:06:26,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:06:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:06:26,920 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 117 [2022-11-16 11:06:26,922 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 234 transitions, 1707 flow. Second operand has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:26,922 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:26,922 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 117 [2022-11-16 11:06:26,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:27,878 INFO L130 PetriNetUnfolder]: 1178/2580 cut-off events. [2022-11-16 11:06:27,878 INFO L131 PetriNetUnfolder]: For 8450/8471 co-relation queries the response was YES. [2022-11-16 11:06:27,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9829 conditions, 2580 events. 1178/2580 cut-off events. For 8450/8471 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19241 event pairs, 352 based on Foata normal form. 6/2563 useless extension candidates. Maximal degree in co-relation 9790. Up to 1568 conditions per place. [2022-11-16 11:06:27,909 INFO L137 encePairwiseOnDemand]: 100/117 looper letters, 175 selfloop transitions, 55 changer transitions 4/290 dead transitions. [2022-11-16 11:06:27,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 290 transitions, 2515 flow [2022-11-16 11:06:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:06:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:06:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1371 transitions. [2022-11-16 11:06:27,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.557997557997558 [2022-11-16 11:06:27,913 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1371 transitions. [2022-11-16 11:06:27,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1371 transitions. [2022-11-16 11:06:27,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:27,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1371 transitions. [2022-11-16 11:06:27,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.28571428571429) internal successors, (1371), 21 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:27,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 117.0) internal successors, (2574), 22 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:27,937 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 117.0) internal successors, (2574), 22 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:27,937 INFO L175 Difference]: Start difference. First operand has 208 places, 234 transitions, 1707 flow. Second operand 21 states and 1371 transitions. [2022-11-16 11:06:27,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 290 transitions, 2515 flow [2022-11-16 11:06:27,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 290 transitions, 2424 flow, removed 15 selfloop flow, removed 15 redundant places. [2022-11-16 11:06:27,974 INFO L231 Difference]: Finished difference. Result has 214 places, 247 transitions, 1871 flow [2022-11-16 11:06:27,975 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1871, PETRI_PLACES=214, PETRI_TRANSITIONS=247} [2022-11-16 11:06:27,975 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 110 predicate places. [2022-11-16 11:06:27,976 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 247 transitions, 1871 flow [2022-11-16 11:06:27,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.05555555555556) internal successors, (1153), 18 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:27,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:27,977 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:27,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 11:06:28,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:06:28,183 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash -308483422, now seen corresponding path program 7 times [2022-11-16 11:06:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:28,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719109326] [2022-11-16 11:06:28,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:28,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:28,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:28,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719109326] [2022-11-16 11:06:28,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719109326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167311359] [2022-11-16 11:06:28,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:06:28,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:28,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:28,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:28,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:06:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:28,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-16 11:06:28,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:29,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:06:29,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:06:29,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:06:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:29,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:29,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167311359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:29,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:29,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 8] total 28 [2022-11-16 11:06:29,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007863425] [2022-11-16 11:06:29,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:29,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:06:29,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:06:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:06:29,996 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-11-16 11:06:29,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 247 transitions, 1871 flow. Second operand has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:29,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:29,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-11-16 11:06:29,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:31,533 INFO L130 PetriNetUnfolder]: 1308/2866 cut-off events. [2022-11-16 11:06:31,534 INFO L131 PetriNetUnfolder]: For 10185/10224 co-relation queries the response was YES. [2022-11-16 11:06:31,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11111 conditions, 2866 events. 1308/2866 cut-off events. For 10185/10224 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21704 event pairs, 354 based on Foata normal form. 10/2860 useless extension candidates. Maximal degree in co-relation 11070. Up to 1593 conditions per place. [2022-11-16 11:06:31,607 INFO L137 encePairwiseOnDemand]: 96/117 looper letters, 190 selfloop transitions, 75 changer transitions 4/312 dead transitions. [2022-11-16 11:06:31,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 312 transitions, 2838 flow [2022-11-16 11:06:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 11:06:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-16 11:06:31,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1380 transitions. [2022-11-16 11:06:31,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4536489151873767 [2022-11-16 11:06:31,614 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1380 transitions. [2022-11-16 11:06:31,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1380 transitions. [2022-11-16 11:06:31,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:31,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1380 transitions. [2022-11-16 11:06:31,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 53.07692307692308) internal successors, (1380), 26 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:31,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:31,624 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 117.0) internal successors, (3159), 27 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:31,624 INFO L175 Difference]: Start difference. First operand has 214 places, 247 transitions, 1871 flow. Second operand 26 states and 1380 transitions. [2022-11-16 11:06:31,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 312 transitions, 2838 flow [2022-11-16 11:06:31,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 312 transitions, 2675 flow, removed 56 selfloop flow, removed 13 redundant places. [2022-11-16 11:06:31,664 INFO L231 Difference]: Finished difference. Result has 227 places, 263 transitions, 2067 flow [2022-11-16 11:06:31,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2067, PETRI_PLACES=227, PETRI_TRANSITIONS=263} [2022-11-16 11:06:31,665 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 123 predicate places. [2022-11-16 11:06:31,665 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 263 transitions, 2067 flow [2022-11-16 11:06:31,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 52.107142857142854) internal successors, (1459), 28 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:31,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:31,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:31,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 11:06:31,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:06:31,871 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1590570842, now seen corresponding path program 8 times [2022-11-16 11:06:31,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:31,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016333555] [2022-11-16 11:06:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:31,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:32,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:32,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016333555] [2022-11-16 11:06:32,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016333555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:32,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994698263] [2022-11-16 11:06:32,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:06:32,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:32,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:32,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:32,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:06:32,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:06:32,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:32,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:06:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:32,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:32,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994698263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:32,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:32,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-11-16 11:06:32,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397106071] [2022-11-16 11:06:32,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:32,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:06:32,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:32,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:06:32,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:06:32,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 117 [2022-11-16 11:06:32,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 263 transitions, 2067 flow. Second operand has 21 states, 21 states have (on average 80.80952380952381) internal successors, (1697), 21 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:32,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:32,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 117 [2022-11-16 11:06:32,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:35,124 INFO L130 PetriNetUnfolder]: 1845/4605 cut-off events. [2022-11-16 11:06:35,124 INFO L131 PetriNetUnfolder]: For 13433/13536 co-relation queries the response was YES. [2022-11-16 11:06:35,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16625 conditions, 4605 events. 1845/4605 cut-off events. For 13433/13536 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 37592 event pairs, 83 based on Foata normal form. 162/4753 useless extension candidates. Maximal degree in co-relation 16582. Up to 861 conditions per place. [2022-11-16 11:06:35,186 INFO L137 encePairwiseOnDemand]: 96/117 looper letters, 439 selfloop transitions, 290 changer transitions 0/803 dead transitions. [2022-11-16 11:06:35,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 803 transitions, 8475 flow [2022-11-16 11:06:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 11:06:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-16 11:06:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3946 transitions. [2022-11-16 11:06:35,204 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7026353276353277 [2022-11-16 11:06:35,205 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3946 transitions. [2022-11-16 11:06:35,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3946 transitions. [2022-11-16 11:06:35,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:35,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3946 transitions. [2022-11-16 11:06:35,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 82.20833333333333) internal successors, (3946), 48 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:35,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 117.0) internal successors, (5733), 49 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:35,231 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 117.0) internal successors, (5733), 49 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:35,231 INFO L175 Difference]: Start difference. First operand has 227 places, 263 transitions, 2067 flow. Second operand 48 states and 3946 transitions. [2022-11-16 11:06:35,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 803 transitions, 8475 flow [2022-11-16 11:06:35,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 803 transitions, 8038 flow, removed 159 selfloop flow, removed 19 redundant places. [2022-11-16 11:06:35,346 INFO L231 Difference]: Finished difference. Result has 271 places, 490 transitions, 4775 flow [2022-11-16 11:06:35,347 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=1905, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4775, PETRI_PLACES=271, PETRI_TRANSITIONS=490} [2022-11-16 11:06:35,348 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 167 predicate places. [2022-11-16 11:06:35,348 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 490 transitions, 4775 flow [2022-11-16 11:06:35,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 80.80952380952381) internal successors, (1697), 21 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:35,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:35,349 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:35,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:35,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:06:35,555 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1837900076, now seen corresponding path program 9 times [2022-11-16 11:06:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:35,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953217414] [2022-11-16 11:06:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:35,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:35,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:35,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953217414] [2022-11-16 11:06:35,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953217414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:35,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264145759] [2022-11-16 11:06:35,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:06:35,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:35,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:35,839 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:35,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:06:36,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:06:36,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:06:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:36,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:06:36,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264145759] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:36,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:36,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-11-16 11:06:36,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685074371] [2022-11-16 11:06:36,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:36,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:06:36,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:36,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:06:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:06:36,321 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 117 [2022-11-16 11:06:36,322 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 490 transitions, 4775 flow. Second operand has 22 states, 22 states have (on average 80.9090909090909) internal successors, (1780), 22 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:36,323 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:36,323 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 117 [2022-11-16 11:06:36,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:41,616 INFO L130 PetriNetUnfolder]: 1852/4793 cut-off events. [2022-11-16 11:06:41,616 INFO L131 PetriNetUnfolder]: For 23230/23314 co-relation queries the response was YES. [2022-11-16 11:06:41,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22086 conditions, 4793 events. 1852/4793 cut-off events. For 23230/23314 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 40095 event pairs, 85 based on Foata normal form. 148/4915 useless extension candidates. Maximal degree in co-relation 22029. Up to 884 conditions per place. [2022-11-16 11:06:41,657 INFO L137 encePairwiseOnDemand]: 96/117 looper letters, 411 selfloop transitions, 274 changer transitions 265/1020 dead transitions. [2022-11-16 11:06:41,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1020 transitions, 11376 flow [2022-11-16 11:06:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-16 11:06:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-11-16 11:06:41,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 8976 transitions. [2022-11-16 11:06:41,671 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6911526911526912 [2022-11-16 11:06:41,671 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 8976 transitions. [2022-11-16 11:06:41,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 8976 transitions. [2022-11-16 11:06:41,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:41,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 8976 transitions. [2022-11-16 11:06:41,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 80.86486486486487) internal successors, (8976), 111 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:41,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 117.0) internal successors, (13104), 112 states have internal predecessors, (13104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:41,714 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 117.0) internal successors, (13104), 112 states have internal predecessors, (13104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:41,714 INFO L175 Difference]: Start difference. First operand has 271 places, 490 transitions, 4775 flow. Second operand 111 states and 8976 transitions. [2022-11-16 11:06:41,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1020 transitions, 11376 flow [2022-11-16 11:06:41,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1020 transitions, 11286 flow, removed 37 selfloop flow, removed 7 redundant places. [2022-11-16 11:06:41,898 INFO L231 Difference]: Finished difference. Result has 398 places, 552 transitions, 5845 flow [2022-11-16 11:06:41,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=4481, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=5845, PETRI_PLACES=398, PETRI_TRANSITIONS=552} [2022-11-16 11:06:41,900 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 294 predicate places. [2022-11-16 11:06:41,900 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 552 transitions, 5845 flow [2022-11-16 11:06:41,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 80.9090909090909) internal successors, (1780), 22 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:41,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:41,901 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:41,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:42,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:06:42,108 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:42,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:42,108 INFO L85 PathProgramCache]: Analyzing trace with hash 813885903, now seen corresponding path program 10 times [2022-11-16 11:06:42,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:42,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241407691] [2022-11-16 11:06:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:42,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:42,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:42,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241407691] [2022-11-16 11:06:42,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241407691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:42,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976608848] [2022-11-16 11:06:42,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:06:42,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:42,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:42,328 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:42,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:06:42,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:06:42,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:42,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:06:42,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:42,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:42,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976608848] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:42,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:42,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-16 11:06:42,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316096298] [2022-11-16 11:06:42,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:42,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 11:06:42,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:42,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 11:06:42,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-11-16 11:06:42,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 117 [2022-11-16 11:06:42,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 552 transitions, 5845 flow. Second operand has 24 states, 24 states have (on average 84.08333333333333) internal successors, (2018), 24 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:42,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:42,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 117 [2022-11-16 11:06:42,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:44,297 INFO L130 PetriNetUnfolder]: 1365/3275 cut-off events. [2022-11-16 11:06:44,297 INFO L131 PetriNetUnfolder]: For 23681/23797 co-relation queries the response was YES. [2022-11-16 11:06:44,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17698 conditions, 3275 events. 1365/3275 cut-off events. For 23681/23797 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 23937 event pairs, 106 based on Foata normal form. 114/3362 useless extension candidates. Maximal degree in co-relation 17617. Up to 864 conditions per place. [2022-11-16 11:06:44,345 INFO L137 encePairwiseOnDemand]: 104/117 looper letters, 284 selfloop transitions, 172 changer transitions 3/654 dead transitions. [2022-11-16 11:06:44,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 654 transitions, 7733 flow [2022-11-16 11:06:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:06:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-16 11:06:44,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1280 transitions. [2022-11-16 11:06:44,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7293447293447294 [2022-11-16 11:06:44,350 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1280 transitions. [2022-11-16 11:06:44,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1280 transitions. [2022-11-16 11:06:44,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:44,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1280 transitions. [2022-11-16 11:06:44,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 85.33333333333333) internal successors, (1280), 15 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:44,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:44,357 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 117.0) internal successors, (1872), 16 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:44,357 INFO L175 Difference]: Start difference. First operand has 398 places, 552 transitions, 5845 flow. Second operand 15 states and 1280 transitions. [2022-11-16 11:06:44,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 654 transitions, 7733 flow [2022-11-16 11:06:44,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 654 transitions, 6632 flow, removed 374 selfloop flow, removed 33 redundant places. [2022-11-16 11:06:44,619 INFO L231 Difference]: Finished difference. Result has 322 places, 568 transitions, 5726 flow [2022-11-16 11:06:44,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=4785, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5726, PETRI_PLACES=322, PETRI_TRANSITIONS=568} [2022-11-16 11:06:44,620 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 218 predicate places. [2022-11-16 11:06:44,621 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 568 transitions, 5726 flow [2022-11-16 11:06:44,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 84.08333333333333) internal successors, (2018), 24 states have internal predecessors, (2018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:44,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:44,622 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:44,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:44,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:06:44,828 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:44,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:44,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1674635759, now seen corresponding path program 11 times [2022-11-16 11:06:44,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:44,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921049433] [2022-11-16 11:06:44,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:44,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:06:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921049433] [2022-11-16 11:06:45,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921049433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:45,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467305899] [2022-11-16 11:06:45,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:06:45,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:45,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:45,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:45,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:06:45,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:06:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:06:45,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:06:45,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:06:45,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467305899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:45,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:45,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-11-16 11:06:45,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396139218] [2022-11-16 11:06:45,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:45,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 11:06:45,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 11:06:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:06:45,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 117 [2022-11-16 11:06:45,511 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 568 transitions, 5726 flow. Second operand has 22 states, 22 states have (on average 80.9090909090909) internal successors, (1780), 22 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:45,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:45,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 117 [2022-11-16 11:06:45,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:47,560 INFO L130 PetriNetUnfolder]: 1323/2850 cut-off events. [2022-11-16 11:06:47,560 INFO L131 PetriNetUnfolder]: For 17102/17206 co-relation queries the response was YES. [2022-11-16 11:06:47,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15895 conditions, 2850 events. 1323/2850 cut-off events. For 17102/17206 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 17877 event pairs, 47 based on Foata normal form. 127/2961 useless extension candidates. Maximal degree in co-relation 15831. Up to 859 conditions per place. [2022-11-16 11:06:47,592 INFO L137 encePairwiseOnDemand]: 98/117 looper letters, 390 selfloop transitions, 301 changer transitions 0/761 dead transitions. [2022-11-16 11:06:47,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 761 transitions, 8956 flow [2022-11-16 11:06:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 11:06:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-16 11:06:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2775 transitions. [2022-11-16 11:06:47,597 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6975867269984917 [2022-11-16 11:06:47,597 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2775 transitions. [2022-11-16 11:06:47,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2775 transitions. [2022-11-16 11:06:47,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:47,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2775 transitions. [2022-11-16 11:06:47,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 81.61764705882354) internal successors, (2775), 34 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:47,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 117.0) internal successors, (4095), 35 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:47,611 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 117.0) internal successors, (4095), 35 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:47,611 INFO L175 Difference]: Start difference. First operand has 322 places, 568 transitions, 5726 flow. Second operand 34 states and 2775 transitions. [2022-11-16 11:06:47,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 761 transitions, 8956 flow [2022-11-16 11:06:47,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 761 transitions, 8796 flow, removed 39 selfloop flow, removed 10 redundant places. [2022-11-16 11:06:47,747 INFO L231 Difference]: Finished difference. Result has 338 places, 604 transitions, 6769 flow [2022-11-16 11:06:47,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=5304, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=6769, PETRI_PLACES=338, PETRI_TRANSITIONS=604} [2022-11-16 11:06:47,748 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 234 predicate places. [2022-11-16 11:06:47,749 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 604 transitions, 6769 flow [2022-11-16 11:06:47,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 80.9090909090909) internal successors, (1780), 22 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:47,752 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:47,752 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:47,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:47,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:06:47,958 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:47,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:47,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1448223529, now seen corresponding path program 12 times [2022-11-16 11:06:47,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:47,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589417218] [2022-11-16 11:06:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:47,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:06:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:06:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589417218] [2022-11-16 11:06:49,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589417218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:06:49,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326702866] [2022-11-16 11:06:49,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:06:49,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:06:49,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:06:49,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:06:49,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:06:50,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:06:50,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:06:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-16 11:06:50,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:06:50,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:06:51,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:06:51,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:06:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:06:51,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:06:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:06:52,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326702866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:06:52,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:06:52,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26, 14] total 54 [2022-11-16 11:06:52,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861469997] [2022-11-16 11:06:52,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:06:52,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-16 11:06:52,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:06:52,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-16 11:06:52,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2687, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:06:52,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-11-16 11:06:52,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 604 transitions, 6769 flow. Second operand has 54 states, 54 states have (on average 44.333333333333336) internal successors, (2394), 54 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:52,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:06:52,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-11-16 11:06:52,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:06:57,869 INFO L130 PetriNetUnfolder]: 3115/5594 cut-off events. [2022-11-16 11:06:57,869 INFO L131 PetriNetUnfolder]: For 34257/34302 co-relation queries the response was YES. [2022-11-16 11:06:57,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32395 conditions, 5594 events. 3115/5594 cut-off events. For 34257/34302 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 39754 event pairs, 246 based on Foata normal form. 24/5599 useless extension candidates. Maximal degree in co-relation 32331. Up to 3719 conditions per place. [2022-11-16 11:06:57,983 INFO L137 encePairwiseOnDemand]: 86/117 looper letters, 797 selfloop transitions, 239 changer transitions 4/1075 dead transitions. [2022-11-16 11:06:57,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1075 transitions, 13620 flow [2022-11-16 11:06:57,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 11:06:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-16 11:06:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2608 transitions. [2022-11-16 11:06:57,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.398046398046398 [2022-11-16 11:06:57,989 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2608 transitions. [2022-11-16 11:06:57,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2608 transitions. [2022-11-16 11:06:57,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:06:57,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2608 transitions. [2022-11-16 11:06:57,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 46.57142857142857) internal successors, (2608), 56 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:58,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 117.0) internal successors, (6669), 57 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:58,008 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 117.0) internal successors, (6669), 57 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:58,008 INFO L175 Difference]: Start difference. First operand has 338 places, 604 transitions, 6769 flow. Second operand 56 states and 2608 transitions. [2022-11-16 11:06:58,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1075 transitions, 13620 flow [2022-11-16 11:06:58,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1075 transitions, 13303 flow, removed 32 selfloop flow, removed 11 redundant places. [2022-11-16 11:06:58,250 INFO L231 Difference]: Finished difference. Result has 394 places, 776 transitions, 9275 flow [2022-11-16 11:06:58,251 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=6571, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=9275, PETRI_PLACES=394, PETRI_TRANSITIONS=776} [2022-11-16 11:06:58,252 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 290 predicate places. [2022-11-16 11:06:58,252 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 776 transitions, 9275 flow [2022-11-16 11:06:58,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 44.333333333333336) internal successors, (2394), 54 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:06:58,253 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:06:58,253 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:06:58,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:06:58,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:06:58,459 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:06:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:06:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1414248181, now seen corresponding path program 13 times [2022-11-16 11:06:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:06:58,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863991040] [2022-11-16 11:06:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:06:58,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:06:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:00,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863991040] [2022-11-16 11:07:00,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863991040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111542237] [2022-11-16 11:07:00,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:07:00,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:00,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:00,041 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:00,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:07:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:00,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-16 11:07:00,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:00,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:01,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:07:01,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-16 11:07:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:07:01,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111542237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:01,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:01,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 14] total 47 [2022-11-16 11:07:01,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546337118] [2022-11-16 11:07:01,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:01,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 11:07:01,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 11:07:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2007, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:07:01,312 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-11-16 11:07:01,314 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 776 transitions, 9275 flow. Second operand has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:01,314 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:07:01,315 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-11-16 11:07:01,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:07:06,019 INFO L130 PetriNetUnfolder]: 3714/6685 cut-off events. [2022-11-16 11:07:06,020 INFO L131 PetriNetUnfolder]: For 43836/43863 co-relation queries the response was YES. [2022-11-16 11:07:06,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39247 conditions, 6685 events. 3714/6685 cut-off events. For 43836/43863 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 49422 event pairs, 319 based on Foata normal form. 16/6672 useless extension candidates. Maximal degree in co-relation 39174. Up to 4328 conditions per place. [2022-11-16 11:07:06,125 INFO L137 encePairwiseOnDemand]: 88/117 looper letters, 899 selfloop transitions, 275 changer transitions 4/1216 dead transitions. [2022-11-16 11:07:06,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1216 transitions, 15963 flow [2022-11-16 11:07:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 11:07:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-16 11:07:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3075 transitions. [2022-11-16 11:07:06,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46108861898335585 [2022-11-16 11:07:06,131 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3075 transitions. [2022-11-16 11:07:06,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3075 transitions. [2022-11-16 11:07:06,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:07:06,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3075 transitions. [2022-11-16 11:07:06,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 53.94736842105263) internal successors, (3075), 57 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:06,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 117.0) internal successors, (6786), 58 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:06,146 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 117.0) internal successors, (6786), 58 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:06,147 INFO L175 Difference]: Start difference. First operand has 394 places, 776 transitions, 9275 flow. Second operand 57 states and 3075 transitions. [2022-11-16 11:07:06,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1216 transitions, 15963 flow [2022-11-16 11:07:06,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1216 transitions, 15775 flow, removed 79 selfloop flow, removed 15 redundant places. [2022-11-16 11:07:06,650 INFO L231 Difference]: Finished difference. Result has 445 places, 860 transitions, 11074 flow [2022-11-16 11:07:06,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=9133, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=11074, PETRI_PLACES=445, PETRI_TRANSITIONS=860} [2022-11-16 11:07:06,654 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 341 predicate places. [2022-11-16 11:07:06,655 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 860 transitions, 11074 flow [2022-11-16 11:07:06,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 50.97872340425532) internal successors, (2396), 47 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:06,655 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:07:06,656 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:06,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:06,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:06,861 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:07:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash -830023367, now seen corresponding path program 14 times [2022-11-16 11:07:06,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:06,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335530689] [2022-11-16 11:07:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:06,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:08,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:08,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335530689] [2022-11-16 11:07:08,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335530689] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:08,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593992445] [2022-11-16 11:07:08,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:07:08,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:08,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:08,555 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:08,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:07:08,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:07:08,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:08,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 11:07:08,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:07:09,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:09,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:07:09,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-16 11:07:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:07:09,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593992445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:09,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:09,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 14] total 47 [2022-11-16 11:07:09,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519899828] [2022-11-16 11:07:09,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:09,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 11:07:09,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:09,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 11:07:09,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1999, Unknown=0, NotChecked=0, Total=2162 [2022-11-16 11:07:09,902 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-11-16 11:07:09,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 860 transitions, 11074 flow. Second operand has 47 states, 47 states have (on average 51.234042553191486) internal successors, (2408), 47 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:09,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:07:09,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-11-16 11:07:09,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:07:15,405 INFO L130 PetriNetUnfolder]: 4183/7590 cut-off events. [2022-11-16 11:07:15,405 INFO L131 PetriNetUnfolder]: For 57815/57864 co-relation queries the response was YES. [2022-11-16 11:07:15,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45755 conditions, 7590 events. 4183/7590 cut-off events. For 57815/57864 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 57710 event pairs, 435 based on Foata normal form. 28/7580 useless extension candidates. Maximal degree in co-relation 45671. Up to 5266 conditions per place. [2022-11-16 11:07:15,503 INFO L137 encePairwiseOnDemand]: 88/117 looper letters, 885 selfloop transitions, 303 changer transitions 4/1230 dead transitions. [2022-11-16 11:07:15,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 1230 transitions, 17458 flow [2022-11-16 11:07:15,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 11:07:15,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-16 11:07:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3088 transitions. [2022-11-16 11:07:15,508 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45505452402004126 [2022-11-16 11:07:15,508 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3088 transitions. [2022-11-16 11:07:15,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3088 transitions. [2022-11-16 11:07:15,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:07:15,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3088 transitions. [2022-11-16 11:07:15,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 53.241379310344826) internal successors, (3088), 58 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:15,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 117.0) internal successors, (6903), 59 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:15,524 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 117.0) internal successors, (6903), 59 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:15,525 INFO L175 Difference]: Start difference. First operand has 445 places, 860 transitions, 11074 flow. Second operand 58 states and 3088 transitions. [2022-11-16 11:07:15,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 1230 transitions, 17458 flow [2022-11-16 11:07:15,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1230 transitions, 16998 flow, removed 54 selfloop flow, removed 38 redundant places. [2022-11-16 11:07:15,929 INFO L231 Difference]: Finished difference. Result has 474 places, 940 transitions, 12803 flow [2022-11-16 11:07:15,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=10622, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=12803, PETRI_PLACES=474, PETRI_TRANSITIONS=940} [2022-11-16 11:07:15,931 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 370 predicate places. [2022-11-16 11:07:15,931 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 940 transitions, 12803 flow [2022-11-16 11:07:15,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 51.234042553191486) internal successors, (2408), 47 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:15,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:07:15,932 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:15,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:16,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:16,132 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:07:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:16,133 INFO L85 PathProgramCache]: Analyzing trace with hash 635767145, now seen corresponding path program 15 times [2022-11-16 11:07:16,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:16,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995560744] [2022-11-16 11:07:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:16,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:17,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:17,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995560744] [2022-11-16 11:07:17,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995560744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:17,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106604278] [2022-11-16 11:07:17,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:07:17,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:17,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:17,575 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:17,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:07:17,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:07:17,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:17,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 11:07:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:19,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:07:19,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2022-11-16 11:07:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:19,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:20,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:07:20,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 67 [2022-11-16 11:07:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:21,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106604278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:21,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:21,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 25] total 73 [2022-11-16 11:07:21,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811957365] [2022-11-16 11:07:21,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:21,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 11:07:21,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:21,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 11:07:21,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4767, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 11:07:21,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-11-16 11:07:21,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 940 transitions, 12803 flow. Second operand has 73 states, 73 states have (on average 50.71232876712329) internal successors, (3702), 73 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:21,613 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:07:21,613 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-11-16 11:07:21,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:07:31,571 INFO L130 PetriNetUnfolder]: 6517/11881 cut-off events. [2022-11-16 11:07:31,571 INFO L131 PetriNetUnfolder]: For 101440/101473 co-relation queries the response was YES. [2022-11-16 11:07:31,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73428 conditions, 11881 events. 6517/11881 cut-off events. For 101440/101473 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 98294 event pairs, 555 based on Foata normal form. 16/11861 useless extension candidates. Maximal degree in co-relation 73333. Up to 6070 conditions per place. [2022-11-16 11:07:31,798 INFO L137 encePairwiseOnDemand]: 85/117 looper letters, 1116 selfloop transitions, 650 changer transitions 11/1815 dead transitions. [2022-11-16 11:07:31,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 1815 transitions, 26930 flow [2022-11-16 11:07:31,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-16 11:07:31,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2022-11-16 11:07:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4060 transitions. [2022-11-16 11:07:31,806 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4565901934322987 [2022-11-16 11:07:31,806 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4060 transitions. [2022-11-16 11:07:31,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4060 transitions. [2022-11-16 11:07:31,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:07:31,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4060 transitions. [2022-11-16 11:07:31,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 53.421052631578945) internal successors, (4060), 76 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:31,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 117.0) internal successors, (9009), 77 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:31,828 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 117.0) internal successors, (9009), 77 states have internal predecessors, (9009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:31,828 INFO L175 Difference]: Start difference. First operand has 474 places, 940 transitions, 12803 flow. Second operand 76 states and 4060 transitions. [2022-11-16 11:07:31,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 1815 transitions, 26930 flow [2022-11-16 11:07:32,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 1815 transitions, 25855 flow, removed 351 selfloop flow, removed 42 redundant places. [2022-11-16 11:07:33,030 INFO L231 Difference]: Finished difference. Result has 538 places, 1383 transitions, 21767 flow [2022-11-16 11:07:33,032 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=12152, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=21767, PETRI_PLACES=538, PETRI_TRANSITIONS=1383} [2022-11-16 11:07:33,032 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 434 predicate places. [2022-11-16 11:07:33,033 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1383 transitions, 21767 flow [2022-11-16 11:07:33,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 50.71232876712329) internal successors, (3702), 73 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:33,034 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:07:33,034 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:33,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:33,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:33,240 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:07:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1005576847, now seen corresponding path program 16 times [2022-11-16 11:07:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:33,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770690884] [2022-11-16 11:07:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:34,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:34,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770690884] [2022-11-16 11:07:34,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770690884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:34,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144518709] [2022-11-16 11:07:34,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:07:34,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:34,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:34,972 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:34,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:07:35,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:07:35,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 11:07:35,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:07:35,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:36,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:07:36,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-16 11:07:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:07:36,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144518709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:36,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:36,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19, 14] total 46 [2022-11-16 11:07:36,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234463999] [2022-11-16 11:07:36,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:36,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 11:07:36,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:36,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 11:07:36,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1909, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:07:36,185 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 117 [2022-11-16 11:07:36,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1383 transitions, 21767 flow. Second operand has 46 states, 46 states have (on average 51.28260869565217) internal successors, (2359), 46 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:36,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:07:36,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 117 [2022-11-16 11:07:36,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:07:45,603 INFO L130 PetriNetUnfolder]: 6818/12385 cut-off events. [2022-11-16 11:07:45,604 INFO L131 PetriNetUnfolder]: For 126318/126352 co-relation queries the response was YES. [2022-11-16 11:07:45,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83441 conditions, 12385 events. 6818/12385 cut-off events. For 126318/126352 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 102945 event pairs, 1000 based on Foata normal form. 19/12340 useless extension candidates. Maximal degree in co-relation 83315. Up to 9912 conditions per place. [2022-11-16 11:07:45,945 INFO L137 encePairwiseOnDemand]: 88/117 looper letters, 1296 selfloop transitions, 323 changer transitions 4/1661 dead transitions. [2022-11-16 11:07:45,945 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1661 transitions, 28235 flow [2022-11-16 11:07:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 11:07:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-16 11:07:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2778 transitions. [2022-11-16 11:07:45,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45660749506903353 [2022-11-16 11:07:45,951 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2778 transitions. [2022-11-16 11:07:45,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2778 transitions. [2022-11-16 11:07:45,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:07:45,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2778 transitions. [2022-11-16 11:07:45,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 53.42307692307692) internal successors, (2778), 52 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:46,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 117.0) internal successors, (6201), 53 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:46,079 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 117.0) internal successors, (6201), 53 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:46,079 INFO L175 Difference]: Start difference. First operand has 538 places, 1383 transitions, 21767 flow. Second operand 52 states and 2778 transitions. [2022-11-16 11:07:46,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1661 transitions, 28235 flow [2022-11-16 11:07:47,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1661 transitions, 27442 flow, removed 358 selfloop flow, removed 30 redundant places. [2022-11-16 11:07:47,741 INFO L231 Difference]: Finished difference. Result has 563 places, 1428 transitions, 22761 flow [2022-11-16 11:07:47,742 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=21000, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1066, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=22761, PETRI_PLACES=563, PETRI_TRANSITIONS=1428} [2022-11-16 11:07:47,742 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 459 predicate places. [2022-11-16 11:07:47,742 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 1428 transitions, 22761 flow [2022-11-16 11:07:47,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 51.28260869565217) internal successors, (2359), 46 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:47,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:07:47,743 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:07:47,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:07:47,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:47,945 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:07:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:07:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1238531119, now seen corresponding path program 17 times [2022-11-16 11:07:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:07:47,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114673165] [2022-11-16 11:07:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:07:47,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:07:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:07:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:07:50,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:07:50,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114673165] [2022-11-16 11:07:50,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114673165] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:07:50,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964347420] [2022-11-16 11:07:50,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:07:50,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:07:50,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:07:50,152 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:07:50,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:07:50,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:07:50,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:07:50,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 11:07:50,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:07:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:07:51,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:07:51,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:07:51,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 51 [2022-11-16 11:07:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:07:51,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964347420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:07:51,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:07:51,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21, 14] total 55 [2022-11-16 11:07:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414113577] [2022-11-16 11:07:51,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:07:51,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 11:07:51,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:07:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 11:07:51,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2764, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 11:07:51,585 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 117 [2022-11-16 11:07:51,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 1428 transitions, 22761 flow. Second operand has 55 states, 55 states have (on average 41.054545454545455) internal successors, (2258), 55 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:07:51,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:07:51,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 117 [2022-11-16 11:07:51,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:02,144 INFO L130 PetriNetUnfolder]: 7287/13262 cut-off events. [2022-11-16 11:08:02,144 INFO L131 PetriNetUnfolder]: For 139345/139379 co-relation queries the response was YES. [2022-11-16 11:08:02,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89640 conditions, 13262 events. 7287/13262 cut-off events. For 139345/139379 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 111757 event pairs, 1027 based on Foata normal form. 22/13218 useless extension candidates. Maximal degree in co-relation 89512. Up to 9792 conditions per place. [2022-11-16 11:08:02,502 INFO L137 encePairwiseOnDemand]: 86/117 looper letters, 1341 selfloop transitions, 411 changer transitions 4/1788 dead transitions. [2022-11-16 11:08:02,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1788 transitions, 30430 flow [2022-11-16 11:08:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-16 11:08:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2022-11-16 11:08:02,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 2473 transitions. [2022-11-16 11:08:02,507 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37082021292547607 [2022-11-16 11:08:02,507 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 2473 transitions. [2022-11-16 11:08:02,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 2473 transitions. [2022-11-16 11:08:02,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:02,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 2473 transitions. [2022-11-16 11:08:02,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 43.3859649122807) internal successors, (2473), 57 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 117.0) internal successors, (6786), 58 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,522 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 117.0) internal successors, (6786), 58 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:02,523 INFO L175 Difference]: Start difference. First operand has 563 places, 1428 transitions, 22761 flow. Second operand 57 states and 2473 transitions. [2022-11-16 11:08:02,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1788 transitions, 30430 flow [2022-11-16 11:08:04,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1788 transitions, 29903 flow, removed 87 selfloop flow, removed 39 redundant places. [2022-11-16 11:08:04,410 INFO L231 Difference]: Finished difference. Result has 585 places, 1477 transitions, 24357 flow [2022-11-16 11:08:04,411 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=22236, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1023, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=24357, PETRI_PLACES=585, PETRI_TRANSITIONS=1477} [2022-11-16 11:08:04,412 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 481 predicate places. [2022-11-16 11:08:04,412 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 1477 transitions, 24357 flow [2022-11-16 11:08:04,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 41.054545454545455) internal successors, (2258), 55 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:04,413 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:04,413 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:04,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:04,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 11:08:04,619 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:04,620 INFO L85 PathProgramCache]: Analyzing trace with hash -194871501, now seen corresponding path program 18 times [2022-11-16 11:08:04,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:04,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596207506] [2022-11-16 11:08:04,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:04,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:06,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596207506] [2022-11-16 11:08:06,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596207506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:06,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567957844] [2022-11-16 11:08:06,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:08:06,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:06,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:06,526 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:06,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:08:06,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 11:08:06,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:06,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-16 11:08:06,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:07,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:08:07,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:08:07,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:08:07,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:08:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:08,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:08,715 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_574) c_~A~0.base))) (= (+ (select .cse0 (+ c_~A~0.offset 4)) (select .cse0 c_~A~0.offset)) (let ((.cse1 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse1)) c_~counter~0 (select .cse0 (+ c_~A~0.offset .cse1 4))))))) is different from false [2022-11-16 11:08:08,858 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array Int Int)) (v_ArrVal_574 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_573))) (= (+ c_~counter~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_574) c_~A~0.base) c_~A~0.offset)))) is different from false [2022-11-16 11:08:08,877 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array Int Int)) (v_ArrVal_574 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_573))) (= (+ c_~counter~0 (select (select .cse0 |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_574) |c_ULTIMATE.start_main_#t~ret8#1.base|) |c_ULTIMATE.start_main_#t~ret8#1.offset|)))) is different from false [2022-11-16 11:08:09,038 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_573 (Array Int Int)) (v_ArrVal_574 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_573))) (= (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~counter~0) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_574) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) is different from false [2022-11-16 11:08:09,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:08:09,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 35 [2022-11-16 11:08:09,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 122 [2022-11-16 11:08:09,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 114 [2022-11-16 11:08:09,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2022-11-16 11:08:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 9 not checked. [2022-11-16 11:08:09,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567957844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:09,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:09,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 23] total 65 [2022-11-16 11:08:09,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526566086] [2022-11-16 11:08:09,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:09,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 11:08:09,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:09,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 11:08:09,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=3372, Unknown=82, NotChecked=484, Total=4160 [2022-11-16 11:08:09,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-11-16 11:08:09,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 1477 transitions, 24357 flow. Second operand has 65 states, 65 states have (on average 43.815384615384616) internal successors, (2848), 65 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:09,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:09,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-11-16 11:08:09,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:22,942 INFO L130 PetriNetUnfolder]: 7734/14087 cut-off events. [2022-11-16 11:08:22,943 INFO L131 PetriNetUnfolder]: For 157261/157300 co-relation queries the response was YES. [2022-11-16 11:08:23,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96740 conditions, 14087 events. 7734/14087 cut-off events. For 157261/157300 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 120246 event pairs, 963 based on Foata normal form. 32/14059 useless extension candidates. Maximal degree in co-relation 96607. Up to 9499 conditions per place. [2022-11-16 11:08:23,508 INFO L137 encePairwiseOnDemand]: 86/117 looper letters, 1323 selfloop transitions, 460 changer transitions 4/1822 dead transitions. [2022-11-16 11:08:23,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 1822 transitions, 32020 flow [2022-11-16 11:08:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-16 11:08:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-16 11:08:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2419 transitions. [2022-11-16 11:08:23,512 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3976002629848784 [2022-11-16 11:08:23,512 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2419 transitions. [2022-11-16 11:08:23,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2419 transitions. [2022-11-16 11:08:23,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:23,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2419 transitions. [2022-11-16 11:08:23,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 46.51923076923077) internal successors, (2419), 52 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:23,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 117.0) internal successors, (6201), 53 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:23,524 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 117.0) internal successors, (6201), 53 states have internal predecessors, (6201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:23,524 INFO L175 Difference]: Start difference. First operand has 585 places, 1477 transitions, 24357 flow. Second operand 52 states and 2419 transitions. [2022-11-16 11:08:23,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 1822 transitions, 32020 flow [2022-11-16 11:08:25,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 1822 transitions, 31401 flow, removed 117 selfloop flow, removed 48 redundant places. [2022-11-16 11:08:25,957 INFO L231 Difference]: Finished difference. Result has 597 places, 1553 transitions, 26474 flow [2022-11-16 11:08:25,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=23748, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1063, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=26474, PETRI_PLACES=597, PETRI_TRANSITIONS=1553} [2022-11-16 11:08:25,959 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 493 predicate places. [2022-11-16 11:08:25,959 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 1553 transitions, 26474 flow [2022-11-16 11:08:25,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 43.815384615384616) internal successors, (2848), 65 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:25,960 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:25,961 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:25,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:26,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:26,170 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:26,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:26,170 INFO L85 PathProgramCache]: Analyzing trace with hash 799903897, now seen corresponding path program 19 times [2022-11-16 11:08:26,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:26,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847303583] [2022-11-16 11:08:26,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:26,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:28,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:28,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847303583] [2022-11-16 11:08:28,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847303583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:28,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562283712] [2022-11-16 11:08:28,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:08:28,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:28,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:28,731 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:28,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:08:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 11:08:28,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:08:29,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:08:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:08:30,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:30,363 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_603 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_603) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))))) is different from false [2022-11-16 11:08:30,394 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_603 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_603) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4))) (+ (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_#t~post1#1| 4) 4)) c_~counter~0)))) is different from false [2022-11-16 11:08:30,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:08:30,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 81 [2022-11-16 11:08:30,526 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:08:30,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 35 [2022-11-16 11:08:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 4 not checked. [2022-11-16 11:08:31,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562283712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:31,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:31,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 23, 21] total 66 [2022-11-16 11:08:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527111791] [2022-11-16 11:08:31,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:31,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-16 11:08:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-16 11:08:31,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=3791, Unknown=10, NotChecked=250, Total=4290 [2022-11-16 11:08:31,207 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-11-16 11:08:31,209 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1553 transitions, 26474 flow. Second operand has 66 states, 66 states have (on average 43.72727272727273) internal successors, (2886), 66 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:31,209 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:31,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-11-16 11:08:31,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:08:48,737 INFO L130 PetriNetUnfolder]: 9130/16693 cut-off events. [2022-11-16 11:08:48,737 INFO L131 PetriNetUnfolder]: For 200161/200209 co-relation queries the response was YES. [2022-11-16 11:08:49,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116524 conditions, 16693 events. 9130/16693 cut-off events. For 200161/200209 co-relation queries the response was YES. Maximal size of possible extension queue 858. Compared 146639 event pairs, 1204 based on Foata normal form. 33/16652 useless extension candidates. Maximal degree in co-relation 116381. Up to 10739 conditions per place. [2022-11-16 11:08:49,258 INFO L137 encePairwiseOnDemand]: 87/117 looper letters, 1462 selfloop transitions, 662 changer transitions 8/2167 dead transitions. [2022-11-16 11:08:49,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 2167 transitions, 38839 flow [2022-11-16 11:08:49,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 11:08:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-16 11:08:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 3337 transitions. [2022-11-16 11:08:49,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39613010446343777 [2022-11-16 11:08:49,263 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 3337 transitions. [2022-11-16 11:08:49,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 3337 transitions. [2022-11-16 11:08:49,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:08:49,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 3337 transitions. [2022-11-16 11:08:49,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 46.34722222222222) internal successors, (3337), 72 states have internal predecessors, (3337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:49,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 117.0) internal successors, (8541), 73 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:49,281 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 117.0) internal successors, (8541), 73 states have internal predecessors, (8541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:49,281 INFO L175 Difference]: Start difference. First operand has 597 places, 1553 transitions, 26474 flow. Second operand 72 states and 3337 transitions. [2022-11-16 11:08:49,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 2167 transitions, 38839 flow [2022-11-16 11:08:52,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 2167 transitions, 38025 flow, removed 238 selfloop flow, removed 30 redundant places. [2022-11-16 11:08:52,302 INFO L231 Difference]: Finished difference. Result has 656 places, 1749 transitions, 31292 flow [2022-11-16 11:08:52,303 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=25803, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=496, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1025, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=31292, PETRI_PLACES=656, PETRI_TRANSITIONS=1749} [2022-11-16 11:08:52,303 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 552 predicate places. [2022-11-16 11:08:52,303 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 1749 transitions, 31292 flow [2022-11-16 11:08:52,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 43.72727272727273) internal successors, (2886), 66 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:52,304 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:08:52,304 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:08:52,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:08:52,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:52,505 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:08:52,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:08:52,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1982964057, now seen corresponding path program 20 times [2022-11-16 11:08:52,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:08:52,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973412310] [2022-11-16 11:08:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:08:52,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:08:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:08:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:08:54,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:08:54,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973412310] [2022-11-16 11:08:54,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973412310] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:08:54,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132931982] [2022-11-16 11:08:54,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:08:54,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:08:54,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:08:54,958 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:08:54,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:08:55,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:08:55,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:08:55,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 11:08:55,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:08:55,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:08:55,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:08:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:08:56,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:08:56,592 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_632 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_632) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))))) is different from false [2022-11-16 11:08:56,751 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_632 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_632) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset 4))) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4) 4)))))) is different from false [2022-11-16 11:08:56,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:08:56,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 81 [2022-11-16 11:08:56,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:08:56,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 35 [2022-11-16 11:08:57,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-11-16 11:08:57,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132931982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:08:57,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:08:57,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21, 21] total 64 [2022-11-16 11:08:57,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449418123] [2022-11-16 11:08:57,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:08:57,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-16 11:08:57,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:08:57,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-16 11:08:57,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=3542, Unknown=14, NotChecked=242, Total=4032 [2022-11-16 11:08:57,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-11-16 11:08:57,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 1749 transitions, 31292 flow. Second operand has 64 states, 64 states have (on average 43.75) internal successors, (2800), 64 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:08:57,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:08:57,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-11-16 11:08:57,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:09:15,160 INFO L130 PetriNetUnfolder]: 9521/17417 cut-off events. [2022-11-16 11:09:15,160 INFO L131 PetriNetUnfolder]: For 220918/220974 co-relation queries the response was YES. [2022-11-16 11:09:15,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124033 conditions, 17417 events. 9521/17417 cut-off events. For 220918/220974 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 154368 event pairs, 1545 based on Foata normal form. 42/17377 useless extension candidates. Maximal degree in co-relation 123872. Up to 11737 conditions per place. [2022-11-16 11:09:15,729 INFO L137 encePairwiseOnDemand]: 87/117 looper letters, 1451 selfloop transitions, 616 changer transitions 4/2106 dead transitions. [2022-11-16 11:09:15,729 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 2106 transitions, 39633 flow [2022-11-16 11:09:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 11:09:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-16 11:09:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 2953 transitions. [2022-11-16 11:09:15,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3943643162393162 [2022-11-16 11:09:15,733 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 2953 transitions. [2022-11-16 11:09:15,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 2953 transitions. [2022-11-16 11:09:15,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:09:15,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 2953 transitions. [2022-11-16 11:09:15,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 46.140625) internal successors, (2953), 64 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:15,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 117.0) internal successors, (7605), 65 states have internal predecessors, (7605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:15,744 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 117.0) internal successors, (7605), 65 states have internal predecessors, (7605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:15,744 INFO L175 Difference]: Start difference. First operand has 656 places, 1749 transitions, 31292 flow. Second operand 64 states and 2953 transitions. [2022-11-16 11:09:15,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 2106 transitions, 39633 flow [2022-11-16 11:09:19,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 2106 transitions, 38446 flow, removed 339 selfloop flow, removed 45 redundant places. [2022-11-16 11:09:19,296 INFO L231 Difference]: Finished difference. Result has 674 places, 1784 transitions, 32111 flow [2022-11-16 11:09:19,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=30129, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=584, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=32111, PETRI_PLACES=674, PETRI_TRANSITIONS=1784} [2022-11-16 11:09:19,299 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 570 predicate places. [2022-11-16 11:09:19,299 INFO L495 AbstractCegarLoop]: Abstraction has has 674 places, 1784 transitions, 32111 flow [2022-11-16 11:09:19,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 43.75) internal successors, (2800), 64 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:19,300 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:09:19,300 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:09:19,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:09:19,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:09:19,506 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:09:19,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:09:19,506 INFO L85 PathProgramCache]: Analyzing trace with hash 983606023, now seen corresponding path program 21 times [2022-11-16 11:09:19,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:09:19,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690010574] [2022-11-16 11:09:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:09:19,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:09:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:09:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:21,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:09:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690010574] [2022-11-16 11:09:21,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690010574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:09:21,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489270134] [2022-11-16 11:09:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:09:21,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:09:21,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:09:21,220 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:09:21,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:09:21,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:09:21,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:09:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-16 11:09:21,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:09:22,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:09:22,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:09:22,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:09:22,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:09:23,441 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:09:23,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2022-11-16 11:09:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:23,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:09:40,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:09:40,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 64 [2022-11-16 11:09:40,211 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-11-16 11:09:40,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 506 treesize of output 428 [2022-11-16 11:09:40,233 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-11-16 11:09:40,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 418 treesize of output 372 [2022-11-16 11:09:40,255 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2022-11-16 11:09:40,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 362 treesize of output 276 [2022-11-16 11:09:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:09:45,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489270134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:09:45,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:09:45,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 34, 34] total 88 [2022-11-16 11:09:45,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941449057] [2022-11-16 11:09:45,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:09:45,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-16 11:09:45,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:09:45,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-16 11:09:45,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=7096, Unknown=25, NotChecked=0, Total=7656 [2022-11-16 11:09:45,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 117 [2022-11-16 11:09:45,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 674 places, 1784 transitions, 32111 flow. Second operand has 88 states, 88 states have (on average 43.34090909090909) internal successors, (3814), 88 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:09:45,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:09:45,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 117 [2022-11-16 11:09:45,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:10:56,226 INFO L130 PetriNetUnfolder]: 15361/27782 cut-off events. [2022-11-16 11:10:56,227 INFO L131 PetriNetUnfolder]: For 384225/384271 co-relation queries the response was YES. [2022-11-16 11:10:56,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199671 conditions, 27782 events. 15361/27782 cut-off events. For 384225/384271 co-relation queries the response was YES. Maximal size of possible extension queue 1486. Compared 258944 event pairs, 1554 based on Foata normal form. 21/27693 useless extension candidates. Maximal degree in co-relation 199512. Up to 15259 conditions per place. [2022-11-16 11:10:57,108 INFO L137 encePairwiseOnDemand]: 78/117 looper letters, 1926 selfloop transitions, 2000 changer transitions 8/3969 dead transitions. [2022-11-16 11:10:57,108 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 831 places, 3969 transitions, 74665 flow [2022-11-16 11:10:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-11-16 11:10:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2022-11-16 11:10:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 7394 transitions. [2022-11-16 11:10:57,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39497863247863246 [2022-11-16 11:10:57,118 INFO L72 ComplementDD]: Start complementDD. Operand 160 states and 7394 transitions. [2022-11-16 11:10:57,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 160 states and 7394 transitions. [2022-11-16 11:10:57,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:10:57,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 160 states and 7394 transitions. [2022-11-16 11:10:57,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 161 states, 160 states have (on average 46.2125) internal successors, (7394), 160 states have internal predecessors, (7394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:57,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 161 states, 161 states have (on average 117.0) internal successors, (18837), 161 states have internal predecessors, (18837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:57,150 INFO L81 ComplementDD]: Finished complementDD. Result has 161 states, 161 states have (on average 117.0) internal successors, (18837), 161 states have internal predecessors, (18837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:10:57,150 INFO L175 Difference]: Start difference. First operand has 674 places, 1784 transitions, 32111 flow. Second operand 160 states and 7394 transitions. [2022-11-16 11:10:57,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 831 places, 3969 transitions, 74665 flow [2022-11-16 11:11:03,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 779 places, 3969 transitions, 73185 flow, removed 206 selfloop flow, removed 52 redundant places. [2022-11-16 11:11:03,536 INFO L231 Difference]: Finished difference. Result has 871 places, 3526 transitions, 69214 flow [2022-11-16 11:11:03,538 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=31258, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=160, PETRI_FLOW=69214, PETRI_PLACES=871, PETRI_TRANSITIONS=3526} [2022-11-16 11:11:03,538 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 767 predicate places. [2022-11-16 11:11:03,538 INFO L495 AbstractCegarLoop]: Abstraction has has 871 places, 3526 transitions, 69214 flow [2022-11-16 11:11:03,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 43.34090909090909) internal successors, (3814), 88 states have internal predecessors, (3814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:03,539 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:11:03,539 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:11:03,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 11:11:03,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:11:03,740 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 11:11:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:11:03,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1889179477, now seen corresponding path program 22 times [2022-11-16 11:11:03,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:11:03,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526331358] [2022-11-16 11:11:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:11:03,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:11:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:11:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:11:05,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:11:05,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526331358] [2022-11-16 11:11:05,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526331358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:11:05,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431283136] [2022-11-16 11:11:05,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:11:05,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:11:05,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:11:05,658 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:11:05,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4530ef42-80a1-4f6c-8426-2c2f87dc46d5/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:11:05,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:11:05,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:11:05,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 11:11:05,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:11:06,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:11:06,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:11:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:11:07,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:11:07,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:11:07,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 81 [2022-11-16 11:11:07,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:11:07,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 35 [2022-11-16 11:11:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:11:08,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431283136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:11:08,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:11:08,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 21] total 60 [2022-11-16 11:11:08,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460875915] [2022-11-16 11:11:08,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:11:08,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 11:11:08,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:11:08,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 11:11:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=3294, Unknown=37, NotChecked=0, Total=3540 [2022-11-16 11:11:08,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 117 [2022-11-16 11:11:08,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 871 places, 3526 transitions, 69214 flow. Second operand has 60 states, 60 states have (on average 45.85) internal successors, (2751), 60 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:11:08,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:11:08,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 117 [2022-11-16 11:11:08,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand