./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro --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 a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- 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-8393723 [2022-11-18 20:27:39,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:27:39,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:27:39,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:27:39,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:27:39,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:27:39,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:27:39,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:27:39,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:27:39,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:27:39,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:27:39,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:27:39,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:27:39,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:27:39,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:27:39,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:27:39,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:27:39,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:27:39,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:27:39,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:27:39,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:27:39,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:27:39,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:27:39,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:27:39,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:27:39,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:27:39,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:27:39,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:27:39,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:27:39,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:27:39,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:27:39,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:27:39,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:27:39,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:27:39,959 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:27:39,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:27:39,961 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:27:39,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:27:39,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:27:39,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:27:39,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:27:39,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:27:40,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:27:40,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:27:40,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:27:40,010 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:27:40,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:27:40,011 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:27:40,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:27:40,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:27:40,012 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:27:40,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:27:40,014 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:27:40,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:27:40,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:27:40,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:27:40,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:27:40,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:27:40,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:27:40,015 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:27:40,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:27:40,016 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:27:40,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:27:40,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:27:40,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:27:40,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:27:40,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:27:40,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:27:40,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:27:40,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:27:40,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:27:40,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:27:40,020 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:27:40,020 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:27:40,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:27:40,021 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_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-11-18 20:27:40,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:27:40,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:27:40,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:27:40,378 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:27:40,379 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:27:40,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-18 20:27:40,456 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/data/b1cd529a9/195486082cb545b39d7adbd13998a1ed/FLAG7c618ac95 [2022-11-18 20:27:40,966 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:27:40,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-18 20:27:40,975 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/data/b1cd529a9/195486082cb545b39d7adbd13998a1ed/FLAG7c618ac95 [2022-11-18 20:27:41,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/data/b1cd529a9/195486082cb545b39d7adbd13998a1ed [2022-11-18 20:27:41,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:27:41,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:27:41,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:27:41,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:27:41,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:27:41,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325f5645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41, skipping insertion in model container [2022-11-18 20:27:41,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:27:41,353 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:27:41,602 WARN L234 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_26290dc1-2406-48ba-8771-d41dd71d6a62/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-18 20:27:41,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:27:41,642 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:27:41,671 WARN L234 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_26290dc1-2406-48ba-8771-d41dd71d6a62/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-18 20:27:41,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:27:41,691 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:27:41,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41 WrapperNode [2022-11-18 20:27:41,692 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:27:41,693 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:27:41,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:27:41,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:27:41,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,742 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-11-18 20:27:41,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:27:41,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:27:41,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:27:41,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:27:41,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,771 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:27:41,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:27:41,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:27:41,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:27:41,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (1/1) ... [2022-11-18 20:27:41,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:27:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:41,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:27:41,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:27:41,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:27:41,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:27:41,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:27:41,869 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:27:41,870 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:27:41,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:27:41,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:27:41,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:27:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:27:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:27:41,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:27:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:27:41,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:27:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:27:41,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:27:41,876 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:27:42,026 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:27:42,028 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:27:42,301 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:27:42,509 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:27:42,509 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:27:42,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:27:42 BoogieIcfgContainer [2022-11-18 20:27:42,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:27:42,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:27:42,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:27:42,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:27:42,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:27:41" (1/3) ... [2022-11-18 20:27:42,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c66cb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:27:42, skipping insertion in model container [2022-11-18 20:27:42,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:27:41" (2/3) ... [2022-11-18 20:27:42,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c66cb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:27:42, skipping insertion in model container [2022-11-18 20:27:42,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:27:42" (3/3) ... [2022-11-18 20:27:42,533 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-11-18 20:27:42,543 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:27:42,556 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:27:42,556 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:27:42,557 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:27:42,669 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:27:42,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-11-18 20:27:42,775 INFO L130 PetriNetUnfolder]: 9/114 cut-off events. [2022-11-18 20:27:42,775 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:27:42,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-11-18 20:27:42,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-11-18 20:27:42,786 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-11-18 20:27:42,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:27:42,806 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;@2b65b97, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:27:42,806 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 20:27:42,845 INFO L130 PetriNetUnfolder]: 9/104 cut-off events. [2022-11-18 20:27:42,846 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:27:42,846 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:42,847 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] [2022-11-18 20:27:42,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:42,873 INFO L85 PathProgramCache]: Analyzing trace with hash -112901485, now seen corresponding path program 1 times [2022-11-18 20:27:42,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:42,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973470192] [2022-11-18 20:27:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:43,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:43,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973470192] [2022-11-18 20:27:43,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973470192] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:43,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:43,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:27:43,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008802630] [2022-11-18 20:27:43,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:43,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:27:43,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:43,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:27:43,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:27:43,251 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2022-11-18 20:27:43,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:43,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:43,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2022-11-18 20:27:43,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:43,313 INFO L130 PetriNetUnfolder]: 5/101 cut-off events. [2022-11-18 20:27:43,313 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 20:27:43,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 101 events. 5/101 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 8/103 useless extension candidates. Maximal degree in co-relation 79. Up to 9 conditions per place. [2022-11-18 20:27:43,316 INFO L137 encePairwiseOnDemand]: 110/116 looper letters, 6 selfloop transitions, 0 changer transitions 3/99 dead transitions. [2022-11-18 20:27:43,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 222 flow [2022-11-18 20:27:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:27:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:27:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-11-18 20:27:43,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9396551724137931 [2022-11-18 20:27:43,332 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-11-18 20:27:43,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-11-18 20:27:43,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:43,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-11-18 20:27:43,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:43,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:43,348 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:43,350 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 222 flow. Second operand 2 states and 218 transitions. [2022-11-18 20:27:43,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 222 flow [2022-11-18 20:27:43,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:27:43,369 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 196 flow [2022-11-18 20:27:43,372 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2022-11-18 20:27:43,385 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2022-11-18 20:27:43,385 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 196 flow [2022-11-18 20:27:43,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:43,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:43,386 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] [2022-11-18 20:27:43,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:27:43,388 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:43,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:43,390 INFO L85 PathProgramCache]: Analyzing trace with hash 647030864, now seen corresponding path program 1 times [2022-11-18 20:27:43,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:43,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199696239] [2022-11-18 20:27:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:43,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:44,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:44,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199696239] [2022-11-18 20:27:44,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199696239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:44,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:44,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:27:44,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958573794] [2022-11-18 20:27:44,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:44,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:27:44,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:44,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:27:44,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:27:44,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-18 20:27:44,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:44,111 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-18 20:27:44,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:44,328 INFO L130 PetriNetUnfolder]: 7/116 cut-off events. [2022-11-18 20:27:44,328 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 20:27:44,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 116 events. 7/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 148. Up to 15 conditions per place. [2022-11-18 20:27:44,334 INFO L137 encePairwiseOnDemand]: 111/116 looper letters, 21 selfloop transitions, 2 changer transitions 4/103 dead transitions. [2022-11-18 20:27:44,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 266 flow [2022-11-18 20:27:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:27:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:27:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2022-11-18 20:27:44,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7896551724137931 [2022-11-18 20:27:44,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2022-11-18 20:27:44,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2022-11-18 20:27:44,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:44,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2022-11-18 20:27:44,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,366 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,366 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 196 flow. Second operand 5 states and 458 transitions. [2022-11-18 20:27:44,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 266 flow [2022-11-18 20:27:44,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:27:44,374 INFO L231 Difference]: Finished difference. Result has 104 places, 97 transitions, 212 flow [2022-11-18 20:27:44,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2022-11-18 20:27:44,376 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 1 predicate places. [2022-11-18 20:27:44,376 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 212 flow [2022-11-18 20:27:44,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,377 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:44,378 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] [2022-11-18 20:27:44,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:27:44,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:44,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:44,383 INFO L85 PathProgramCache]: Analyzing trace with hash 454314870, now seen corresponding path program 1 times [2022-11-18 20:27:44,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:44,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232169005] [2022-11-18 20:27:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:44,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:44,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:44,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232169005] [2022-11-18 20:27:44,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232169005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:44,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:44,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:27:44,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767125126] [2022-11-18 20:27:44,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:44,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:27:44,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:44,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:27:44,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:27:44,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-18 20:27:44,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:44,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-18 20:27:44,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:44,661 INFO L130 PetriNetUnfolder]: 8/138 cut-off events. [2022-11-18 20:27:44,661 INFO L131 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-11-18 20:27:44,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 138 events. 8/138 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 1 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 170. Up to 15 conditions per place. [2022-11-18 20:27:44,662 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 8 selfloop transitions, 2 changer transitions 2/101 dead transitions. [2022-11-18 20:27:44,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 247 flow [2022-11-18 20:27:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:27:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:27:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-11-18 20:27:44,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9137931034482759 [2022-11-18 20:27:44,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-11-18 20:27:44,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-11-18 20:27:44,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:44,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-11-18 20:27:44,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,670 INFO L175 Difference]: Start difference. First operand has 104 places, 97 transitions, 212 flow. Second operand 3 states and 318 transitions. [2022-11-18 20:27:44,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 247 flow [2022-11-18 20:27:44,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-18 20:27:44,674 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 218 flow [2022-11-18 20:27:44,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2022-11-18 20:27:44,675 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2022-11-18 20:27:44,676 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 218 flow [2022-11-18 20:27:44,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:44,676 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:44,677 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] [2022-11-18 20:27:44,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:27:44,677 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:44,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1650815490, now seen corresponding path program 1 times [2022-11-18 20:27:44,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:44,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124369816] [2022-11-18 20:27:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:44,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:27:45,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:45,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124369816] [2022-11-18 20:27:45,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124369816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:27:45,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:27:45,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:27:45,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266594487] [2022-11-18 20:27:45,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:27:45,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:27:45,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:45,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:27:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:27:45,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 116 [2022-11-18 20:27:45,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:45,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:45,190 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 116 [2022-11-18 20:27:45,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:45,397 INFO L130 PetriNetUnfolder]: 8/181 cut-off events. [2022-11-18 20:27:45,398 INFO L131 PetriNetUnfolder]: For 23/24 co-relation queries the response was YES. [2022-11-18 20:27:45,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 181 events. 8/181 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 355 event pairs, 1 based on Foata normal form. 3/173 useless extension candidates. Maximal degree in co-relation 245. Up to 15 conditions per place. [2022-11-18 20:27:45,400 INFO L137 encePairwiseOnDemand]: 106/116 looper letters, 20 selfloop transitions, 9 changer transitions 7/110 dead transitions. [2022-11-18 20:27:45,400 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 110 transitions, 321 flow [2022-11-18 20:27:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:27:45,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:27:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 819 transitions. [2022-11-18 20:27:45,404 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7844827586206896 [2022-11-18 20:27:45,404 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 819 transitions. [2022-11-18 20:27:45,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 819 transitions. [2022-11-18 20:27:45,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:45,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 819 transitions. [2022-11-18 20:27:45,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:45,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:45,416 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:45,416 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 218 flow. Second operand 9 states and 819 transitions. [2022-11-18 20:27:45,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 110 transitions, 321 flow [2022-11-18 20:27:45,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 110 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:27:45,420 INFO L231 Difference]: Finished difference. Result has 110 places, 99 transitions, 242 flow [2022-11-18 20:27:45,420 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2022-11-18 20:27:45,421 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-11-18 20:27:45,421 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 242 flow [2022-11-18 20:27:45,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:45,422 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:45,422 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] [2022-11-18 20:27:45,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:27:45,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:45,428 INFO L85 PathProgramCache]: Analyzing trace with hash 422775831, now seen corresponding path program 1 times [2022-11-18 20:27:45,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:45,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036926881] [2022-11-18 20:27:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:45,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:27:46,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:46,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036926881] [2022-11-18 20:27:46,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036926881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:46,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425726695] [2022-11-18 20:27:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:46,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:46,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:46,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:46,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:27:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 20:27:46,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:47,011 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 15 treesize of output 7 [2022-11-18 20:27:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:27:47,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:47,146 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:27:47,146 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 27 treesize of output 13 [2022-11-18 20:27:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:27:47,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425726695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:47,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:47,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 14 [2022-11-18 20:27:47,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173247804] [2022-11-18 20:27:47,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:47,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:27:47,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:27:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:27:47,294 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2022-11-18 20:27:47,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 242 flow. Second operand has 14 states, 14 states have (on average 71.07142857142857) internal successors, (995), 14 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:47,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:47,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2022-11-18 20:27:47,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:47,754 INFO L130 PetriNetUnfolder]: 28/232 cut-off events. [2022-11-18 20:27:47,754 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-11-18 20:27:47,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 232 events. 28/232 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 642 event pairs, 0 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 386. Up to 25 conditions per place. [2022-11-18 20:27:47,762 INFO L137 encePairwiseOnDemand]: 100/116 looper letters, 41 selfloop transitions, 15 changer transitions 8/121 dead transitions. [2022-11-18 20:27:47,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 121 transitions, 434 flow [2022-11-18 20:27:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:27:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-18 20:27:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1054 transitions. [2022-11-18 20:27:47,769 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6057471264367816 [2022-11-18 20:27:47,769 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1054 transitions. [2022-11-18 20:27:47,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1054 transitions. [2022-11-18 20:27:47,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:47,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1054 transitions. [2022-11-18 20:27:47,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 70.26666666666667) internal successors, (1054), 15 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:47,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:47,781 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:47,782 INFO L175 Difference]: Start difference. First operand has 110 places, 99 transitions, 242 flow. Second operand 15 states and 1054 transitions. [2022-11-18 20:27:47,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 121 transitions, 434 flow [2022-11-18 20:27:47,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 420 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-18 20:27:47,789 INFO L231 Difference]: Finished difference. Result has 121 places, 102 transitions, 287 flow [2022-11-18 20:27:47,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=287, PETRI_PLACES=121, PETRI_TRANSITIONS=102} [2022-11-18 20:27:47,794 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2022-11-18 20:27:47,794 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 102 transitions, 287 flow [2022-11-18 20:27:47,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 71.07142857142857) internal successors, (995), 14 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:47,799 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:47,800 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] [2022-11-18 20:27:47,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:27:48,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:48,007 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1916387233, now seen corresponding path program 2 times [2022-11-18 20:27:48,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:48,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992934135] [2022-11-18 20:27:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:48,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:27:49,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:49,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992934135] [2022-11-18 20:27:49,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992934135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:49,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427440367] [2022-11-18 20:27:49,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:27:49,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:49,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:49,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:49,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:27:49,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:27:49,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:49,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 20:27:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:50,054 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 [2022-11-18 20:27:50,382 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 [2022-11-18 20:27:50,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:50,624 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 18 treesize of output 20 [2022-11-18 20:27:50,726 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 15 treesize of output 7 [2022-11-18 20:27:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:50,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:50,848 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_92 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_92) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-11-18 20:27:51,250 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_91 (Array Int Int)) (v_ArrVal_92 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_91)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_92) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ .cse1 |c_ULTIMATE.start_main_#t~ret9#1.offset|))) (not (= 5 (select (select .cse0 |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_main_#t~ret9#1.offset|))))))) is different from false [2022-11-18 20:27:51,422 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_91 (Array Int Int)) (v_ArrVal_92 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_91)) (.cse1 (* c_~front~0 4))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_92) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 5) (not (= 5 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) is different from false [2022-11-18 20:27:51,502 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:27:51,503 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 60 treesize of output 48 [2022-11-18 20:27:51,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:27:51,519 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 184 treesize of output 167 [2022-11-18 20:27:51,529 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 130 treesize of output 106 [2022-11-18 20:27:51,544 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:27:51,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 122 [2022-11-18 20:27:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-18 20:27:52,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427440367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:52,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:52,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16] total 37 [2022-11-18 20:27:52,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416872863] [2022-11-18 20:27:52,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:52,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:27:52,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:52,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:27:52,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=972, Unknown=26, NotChecked=198, Total=1332 [2022-11-18 20:27:52,040 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 116 [2022-11-18 20:27:52,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 102 transitions, 287 flow. Second operand has 37 states, 37 states have (on average 54.351351351351354) internal successors, (2011), 37 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:52,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:52,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 116 [2022-11-18 20:27:52,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:53,853 INFO L130 PetriNetUnfolder]: 68/441 cut-off events. [2022-11-18 20:27:53,854 INFO L131 PetriNetUnfolder]: For 308/314 co-relation queries the response was YES. [2022-11-18 20:27:53,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 441 events. 68/441 cut-off events. For 308/314 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2223 event pairs, 2 based on Foata normal form. 6/415 useless extension candidates. Maximal degree in co-relation 847. Up to 82 conditions per place. [2022-11-18 20:27:53,858 INFO L137 encePairwiseOnDemand]: 93/116 looper letters, 60 selfloop transitions, 35 changer transitions 10/150 dead transitions. [2022-11-18 20:27:53,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 150 transitions, 688 flow [2022-11-18 20:27:53,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:27:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-18 20:27:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1274 transitions. [2022-11-18 20:27:53,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4775112443778111 [2022-11-18 20:27:53,864 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1274 transitions. [2022-11-18 20:27:53,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1274 transitions. [2022-11-18 20:27:53,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:53,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1274 transitions. [2022-11-18 20:27:53,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.391304347826086) internal successors, (1274), 23 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:53,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 116.0) internal successors, (2784), 24 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:53,896 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 116.0) internal successors, (2784), 24 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:53,897 INFO L175 Difference]: Start difference. First operand has 121 places, 102 transitions, 287 flow. Second operand 23 states and 1274 transitions. [2022-11-18 20:27:53,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 150 transitions, 688 flow [2022-11-18 20:27:53,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 150 transitions, 656 flow, removed 3 selfloop flow, removed 12 redundant places. [2022-11-18 20:27:53,903 INFO L231 Difference]: Finished difference. Result has 134 places, 123 transitions, 499 flow [2022-11-18 20:27:53,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=499, PETRI_PLACES=134, PETRI_TRANSITIONS=123} [2022-11-18 20:27:53,904 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 31 predicate places. [2022-11-18 20:27:53,904 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 123 transitions, 499 flow [2022-11-18 20:27:53,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.351351351351354) internal successors, (2011), 37 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:53,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:53,906 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:53,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:54,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:54,112 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:54,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:54,113 INFO L85 PathProgramCache]: Analyzing trace with hash -372518993, now seen corresponding path program 3 times [2022-11-18 20:27:54,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:54,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154672342] [2022-11-18 20:27:54,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:54,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154672342] [2022-11-18 20:27:54,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154672342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:54,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614415203] [2022-11-18 20:27:54,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:27:54,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:54,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:54,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:54,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:27:54,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:27:54,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:54,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:27:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:55,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:27:55,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:27:55,768 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 10 [2022-11-18 20:27:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:27:55,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:55,983 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:27:55,984 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 27 treesize of output 13 [2022-11-18 20:27:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:27:56,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614415203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:56,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:56,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 13] total 35 [2022-11-18 20:27:56,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126958875] [2022-11-18 20:27:56,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:56,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:27:56,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:27:56,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:27:56,611 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-11-18 20:27:56,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 123 transitions, 499 flow. Second operand has 35 states, 35 states have (on average 60.05714285714286) internal successors, (2102), 35 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:56,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:56,614 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-11-18 20:27:56,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:58,136 INFO L130 PetriNetUnfolder]: 84/583 cut-off events. [2022-11-18 20:27:58,137 INFO L131 PetriNetUnfolder]: For 957/988 co-relation queries the response was YES. [2022-11-18 20:27:58,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 583 events. 84/583 cut-off events. For 957/988 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3382 event pairs, 2 based on Foata normal form. 24/566 useless extension candidates. Maximal degree in co-relation 1312. Up to 79 conditions per place. [2022-11-18 20:27:58,143 INFO L137 encePairwiseOnDemand]: 92/116 looper letters, 84 selfloop transitions, 45 changer transitions 11/186 dead transitions. [2022-11-18 20:27:58,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 186 transitions, 1114 flow [2022-11-18 20:27:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:27:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 20:27:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1626 transitions. [2022-11-18 20:27:58,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5191570881226054 [2022-11-18 20:27:58,150 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1626 transitions. [2022-11-18 20:27:58,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1626 transitions. [2022-11-18 20:27:58,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:58,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1626 transitions. [2022-11-18 20:27:58,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 60.22222222222222) internal successors, (1626), 27 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:58,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:58,165 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:58,165 INFO L175 Difference]: Start difference. First operand has 134 places, 123 transitions, 499 flow. Second operand 27 states and 1626 transitions. [2022-11-18 20:27:58,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 186 transitions, 1114 flow [2022-11-18 20:27:58,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 186 transitions, 1012 flow, removed 29 selfloop flow, removed 16 redundant places. [2022-11-18 20:27:58,176 INFO L231 Difference]: Finished difference. Result has 153 places, 142 transitions, 703 flow [2022-11-18 20:27:58,176 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=703, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2022-11-18 20:27:58,177 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 50 predicate places. [2022-11-18 20:27:58,178 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 703 flow [2022-11-18 20:27:58,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 60.05714285714286) internal successors, (2102), 35 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:58,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:58,179 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:58,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:58,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:27:58,386 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash 449497713, now seen corresponding path program 4 times [2022-11-18 20:27:58,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717145792] [2022-11-18 20:27:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:58,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:58,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:27:58,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:58,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717145792] [2022-11-18 20:27:58,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717145792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:58,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963472152] [2022-11-18 20:27:58,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:27:58,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:58,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:58,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:58,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:27:58,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:27:58,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:58,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:27:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:27:58,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:27:58,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963472152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:27:58,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:27:58,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-18 20:27:58,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17339912] [2022-11-18 20:27:58,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:58,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:27:58,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:27:58,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:27:58,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-18 20:27:58,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 703 flow. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:58,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:27:58,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-18 20:27:58,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:27:59,177 INFO L130 PetriNetUnfolder]: 73/684 cut-off events. [2022-11-18 20:27:59,177 INFO L131 PetriNetUnfolder]: For 1022/1047 co-relation queries the response was YES. [2022-11-18 20:27:59,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1393 conditions, 684 events. 73/684 cut-off events. For 1022/1047 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4468 event pairs, 4 based on Foata normal form. 19/654 useless extension candidates. Maximal degree in co-relation 1370. Up to 81 conditions per place. [2022-11-18 20:27:59,186 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 26 selfloop transitions, 20 changer transitions 3/156 dead transitions. [2022-11-18 20:27:59,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 156 transitions, 885 flow [2022-11-18 20:27:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:27:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 20:27:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2022-11-18 20:27:59,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.915948275862069 [2022-11-18 20:27:59,188 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2022-11-18 20:27:59,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2022-11-18 20:27:59,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:27:59,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2022-11-18 20:27:59,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:59,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:59,194 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:59,194 INFO L175 Difference]: Start difference. First operand has 153 places, 142 transitions, 703 flow. Second operand 4 states and 425 transitions. [2022-11-18 20:27:59,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 156 transitions, 885 flow [2022-11-18 20:27:59,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 156 transitions, 832 flow, removed 5 selfloop flow, removed 12 redundant places. [2022-11-18 20:27:59,204 INFO L231 Difference]: Finished difference. Result has 146 places, 147 transitions, 762 flow [2022-11-18 20:27:59,204 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=762, PETRI_PLACES=146, PETRI_TRANSITIONS=147} [2022-11-18 20:27:59,207 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 43 predicate places. [2022-11-18 20:27:59,207 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 147 transitions, 762 flow [2022-11-18 20:27:59,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:27:59,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:27:59,208 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:59,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 20:27:59,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:59,414 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:27:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1102803837, now seen corresponding path program 5 times [2022-11-18 20:27:59,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:59,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171436609] [2022-11-18 20:27:59,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:59,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:27:59,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:59,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171436609] [2022-11-18 20:27:59,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171436609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:59,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959361327] [2022-11-18 20:27:59,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:27:59,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:59,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:59,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:27:59,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:27:59,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:27:59,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:00,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:00,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959361327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:00,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:00,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-18 20:28:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047944973] [2022-11-18 20:28:00,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:00,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:28:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:00,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:28:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:28:00,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-18 20:28:00,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 147 transitions, 762 flow. Second operand has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:00,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:00,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-18 20:28:00,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:01,558 INFO L130 PetriNetUnfolder]: 61/689 cut-off events. [2022-11-18 20:28:01,558 INFO L131 PetriNetUnfolder]: For 1061/1078 co-relation queries the response was YES. [2022-11-18 20:28:01,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 689 events. 61/689 cut-off events. For 1061/1078 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4427 event pairs, 6 based on Foata normal form. 12/646 useless extension candidates. Maximal degree in co-relation 1431. Up to 71 conditions per place. [2022-11-18 20:28:01,564 INFO L137 encePairwiseOnDemand]: 103/116 looper letters, 41 selfloop transitions, 19 changer transitions 24/162 dead transitions. [2022-11-18 20:28:01,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 162 transitions, 971 flow [2022-11-18 20:28:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:28:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-18 20:28:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1339 transitions. [2022-11-18 20:28:01,568 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7695402298850574 [2022-11-18 20:28:01,568 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1339 transitions. [2022-11-18 20:28:01,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1339 transitions. [2022-11-18 20:28:01,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:01,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1339 transitions. [2022-11-18 20:28:01,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 89.26666666666667) internal successors, (1339), 15 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:01,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:01,578 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:01,579 INFO L175 Difference]: Start difference. First operand has 146 places, 147 transitions, 762 flow. Second operand 15 states and 1339 transitions. [2022-11-18 20:28:01,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 162 transitions, 971 flow [2022-11-18 20:28:01,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 162 transitions, 962 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 20:28:01,587 INFO L231 Difference]: Finished difference. Result has 159 places, 132 transitions, 628 flow [2022-11-18 20:28:01,588 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=628, PETRI_PLACES=159, PETRI_TRANSITIONS=132} [2022-11-18 20:28:01,589 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 56 predicate places. [2022-11-18 20:28:01,589 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 132 transitions, 628 flow [2022-11-18 20:28:01,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:01,590 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:01,590 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:01,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 20:28:01,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:01,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2107155038, now seen corresponding path program 6 times [2022-11-18 20:28:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:01,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175169690] [2022-11-18 20:28:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:28:02,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175169690] [2022-11-18 20:28:02,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175169690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:02,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288901796] [2022-11-18 20:28:02,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:28:02,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:02,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:02,690 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:02,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:28:02,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 20:28:02,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:02,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:28:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:03,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:03,574 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 18 treesize of output 20 [2022-11-18 20:28:03,724 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 15 treesize of output 7 [2022-11-18 20:28:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:28:03,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:03,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:03,917 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 45 treesize of output 36 [2022-11-18 20:28:03,920 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 9 treesize of output 3 [2022-11-18 20:28:04,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:28:04,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288901796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:04,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:04,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 29 [2022-11-18 20:28:04,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873725209] [2022-11-18 20:28:04,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:04,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:28:04,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:04,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:28:04,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=700, Unknown=7, NotChecked=0, Total=812 [2022-11-18 20:28:04,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-11-18 20:28:04,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 132 transitions, 628 flow. Second operand has 29 states, 29 states have (on average 64.24137931034483) internal successors, (1863), 29 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:04,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:04,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-11-18 20:28:04,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:05,097 INFO L130 PetriNetUnfolder]: 89/644 cut-off events. [2022-11-18 20:28:05,098 INFO L131 PetriNetUnfolder]: For 1235/1257 co-relation queries the response was YES. [2022-11-18 20:28:05,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 644 events. 89/644 cut-off events. For 1235/1257 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3867 event pairs, 2 based on Foata normal form. 10/603 useless extension candidates. Maximal degree in co-relation 1505. Up to 72 conditions per place. [2022-11-18 20:28:05,104 INFO L137 encePairwiseOnDemand]: 100/116 looper letters, 60 selfloop transitions, 25 changer transitions 8/151 dead transitions. [2022-11-18 20:28:05,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 151 transitions, 917 flow [2022-11-18 20:28:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:28:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-18 20:28:05,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1103 transitions. [2022-11-18 20:28:05,108 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5593306288032455 [2022-11-18 20:28:05,109 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1103 transitions. [2022-11-18 20:28:05,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1103 transitions. [2022-11-18 20:28:05,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:05,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1103 transitions. [2022-11-18 20:28:05,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.88235294117646) internal successors, (1103), 17 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:05,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:05,125 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:05,125 INFO L175 Difference]: Start difference. First operand has 159 places, 132 transitions, 628 flow. Second operand 17 states and 1103 transitions. [2022-11-18 20:28:05,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 151 transitions, 917 flow [2022-11-18 20:28:05,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 151 transitions, 849 flow, removed 8 selfloop flow, removed 18 redundant places. [2022-11-18 20:28:05,134 INFO L231 Difference]: Finished difference. Result has 150 places, 133 transitions, 643 flow [2022-11-18 20:28:05,136 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=643, PETRI_PLACES=150, PETRI_TRANSITIONS=133} [2022-11-18 20:28:05,137 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 47 predicate places. [2022-11-18 20:28:05,137 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 133 transitions, 643 flow [2022-11-18 20:28:05,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 64.24137931034483) internal successors, (1863), 29 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:05,138 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:05,139 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:05,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:05,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:05,346 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:05,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1204690504, now seen corresponding path program 7 times [2022-11-18 20:28:05,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651031675] [2022-11-18 20:28:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:06,137 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:28:06,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:06,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651031675] [2022-11-18 20:28:06,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651031675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:06,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456164016] [2022-11-18 20:28:06,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:28:06,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:06,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:06,144 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:06,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:28:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 20:28:06,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:06,718 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 19 treesize of output 7 [2022-11-18 20:28:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:28:06,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:06,831 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:28:06,831 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 28 treesize of output 13 [2022-11-18 20:28:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:28:06,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456164016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:06,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:06,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 23 [2022-11-18 20:28:06,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740709088] [2022-11-18 20:28:06,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:06,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:28:06,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:28:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:28:06,955 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-18 20:28:06,957 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 133 transitions, 643 flow. Second operand has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:06,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:06,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-18 20:28:06,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:08,404 INFO L130 PetriNetUnfolder]: 120/791 cut-off events. [2022-11-18 20:28:08,404 INFO L131 PetriNetUnfolder]: For 1826/1848 co-relation queries the response was YES. [2022-11-18 20:28:08,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 791 events. 120/791 cut-off events. For 1826/1848 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5290 event pairs, 2 based on Foata normal form. 14/743 useless extension candidates. Maximal degree in co-relation 1996. Up to 88 conditions per place. [2022-11-18 20:28:08,410 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 93 selfloop transitions, 45 changer transitions 44/232 dead transitions. [2022-11-18 20:28:08,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 232 transitions, 1581 flow [2022-11-18 20:28:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:28:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-18 20:28:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2385 transitions. [2022-11-18 20:28:08,417 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5556849953401678 [2022-11-18 20:28:08,418 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2385 transitions. [2022-11-18 20:28:08,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2385 transitions. [2022-11-18 20:28:08,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:08,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2385 transitions. [2022-11-18 20:28:08,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.45945945945945) internal successors, (2385), 37 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:08,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:08,434 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:08,434 INFO L175 Difference]: Start difference. First operand has 150 places, 133 transitions, 643 flow. Second operand 37 states and 2385 transitions. [2022-11-18 20:28:08,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 232 transitions, 1581 flow [2022-11-18 20:28:08,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 232 transitions, 1523 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-18 20:28:08,443 INFO L231 Difference]: Finished difference. Result has 186 places, 142 transitions, 860 flow [2022-11-18 20:28:08,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=860, PETRI_PLACES=186, PETRI_TRANSITIONS=142} [2022-11-18 20:28:08,444 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 83 predicate places. [2022-11-18 20:28:08,444 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 142 transitions, 860 flow [2022-11-18 20:28:08,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:08,446 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:08,446 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:08,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 20:28:08,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:08,652 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2130323068, now seen corresponding path program 8 times [2022-11-18 20:28:08,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:08,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035207864] [2022-11-18 20:28:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:08,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:28:09,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:09,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035207864] [2022-11-18 20:28:09,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035207864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:09,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654460371] [2022-11-18 20:28:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:28:09,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:09,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:09,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:09,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:28:09,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:28:09,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 20:28:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:10,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:10,494 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 19 treesize of output 21 [2022-11-18 20:28:10,672 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 19 treesize of output 7 [2022-11-18 20:28:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:28:10,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:10,824 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_250 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_250) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-11-18 20:28:10,856 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:10,857 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 47 treesize of output 37 [2022-11-18 20:28:10,870 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 10 treesize of output 3 [2022-11-18 20:28:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:28:11,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654460371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:11,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:11,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 36 [2022-11-18 20:28:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306598346] [2022-11-18 20:28:11,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:11,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:28:11,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:11,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:28:11,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1074, Unknown=1, NotChecked=66, Total=1260 [2022-11-18 20:28:11,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-11-18 20:28:11,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 142 transitions, 860 flow. Second operand has 36 states, 36 states have (on average 63.75) internal successors, (2295), 36 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:11,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:11,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-11-18 20:28:11,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:12,937 INFO L130 PetriNetUnfolder]: 137/873 cut-off events. [2022-11-18 20:28:12,938 INFO L131 PetriNetUnfolder]: For 2802/2842 co-relation queries the response was YES. [2022-11-18 20:28:12,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 873 events. 137/873 cut-off events. For 2802/2842 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6088 event pairs, 2 based on Foata normal form. 14/814 useless extension candidates. Maximal degree in co-relation 2313. Up to 98 conditions per place. [2022-11-18 20:28:12,946 INFO L137 encePairwiseOnDemand]: 98/116 looper letters, 70 selfloop transitions, 49 changer transitions 20/197 dead transitions. [2022-11-18 20:28:12,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 197 transitions, 1497 flow [2022-11-18 20:28:12,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:28:12,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 20:28:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1571 transitions. [2022-11-18 20:28:12,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5642959770114943 [2022-11-18 20:28:12,951 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1571 transitions. [2022-11-18 20:28:12,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1571 transitions. [2022-11-18 20:28:12,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:12,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1571 transitions. [2022-11-18 20:28:12,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.45833333333333) internal successors, (1571), 24 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:12,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:12,962 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:12,962 INFO L175 Difference]: Start difference. First operand has 186 places, 142 transitions, 860 flow. Second operand 24 states and 1571 transitions. [2022-11-18 20:28:12,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 197 transitions, 1497 flow [2022-11-18 20:28:12,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 197 transitions, 1338 flow, removed 49 selfloop flow, removed 24 redundant places. [2022-11-18 20:28:12,977 INFO L231 Difference]: Finished difference. Result has 179 places, 150 transitions, 937 flow [2022-11-18 20:28:12,977 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=937, PETRI_PLACES=179, PETRI_TRANSITIONS=150} [2022-11-18 20:28:12,978 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 76 predicate places. [2022-11-18 20:28:12,978 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 150 transitions, 937 flow [2022-11-18 20:28:12,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 63.75) internal successors, (2295), 36 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:12,979 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:12,980 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-11-18 20:28:12,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:13,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:13,186 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1187849882, now seen corresponding path program 9 times [2022-11-18 20:28:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:13,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732455472] [2022-11-18 20:28:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:28:13,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732455472] [2022-11-18 20:28:13,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732455472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889744373] [2022-11-18 20:28:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:28:13,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:13,336 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:13,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:28:13,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:28:13,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:28:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:14,732 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-11-18 20:28:14,733 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 26 treesize of output 10 [2022-11-18 20:28:14,789 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:28:14,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:15,067 INFO L321 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-11-18 20:28:15,068 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 27 treesize of output 19 [2022-11-18 20:28:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:28:16,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889744373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:16,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:16,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 18] total 34 [2022-11-18 20:28:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163341005] [2022-11-18 20:28:16,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:16,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 20:28:16,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 20:28:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:28:16,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 116 [2022-11-18 20:28:16,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 150 transitions, 937 flow. Second operand has 34 states, 34 states have (on average 67.02941176470588) internal successors, (2279), 34 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:16,269 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:16,269 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 116 [2022-11-18 20:28:16,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:23,361 INFO L130 PetriNetUnfolder]: 1128/5906 cut-off events. [2022-11-18 20:28:23,361 INFO L131 PetriNetUnfolder]: For 29374/29759 co-relation queries the response was YES. [2022-11-18 20:28:23,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17274 conditions, 5906 events. 1128/5906 cut-off events. For 29374/29759 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 69043 event pairs, 3 based on Foata normal form. 146/5565 useless extension candidates. Maximal degree in co-relation 17241. Up to 842 conditions per place. [2022-11-18 20:28:23,422 INFO L137 encePairwiseOnDemand]: 92/116 looper letters, 244 selfloop transitions, 400 changer transitions 140/837 dead transitions. [2022-11-18 20:28:23,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 837 transitions, 9460 flow [2022-11-18 20:28:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-18 20:28:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-11-18 20:28:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 7184 transitions. [2022-11-18 20:28:23,436 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5898193760262725 [2022-11-18 20:28:23,436 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 7184 transitions. [2022-11-18 20:28:23,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 7184 transitions. [2022-11-18 20:28:23,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:23,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 7184 transitions. [2022-11-18 20:28:23,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 68.41904761904762) internal successors, (7184), 105 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:23,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 116.0) internal successors, (12296), 106 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:23,481 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 116.0) internal successors, (12296), 106 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:23,481 INFO L175 Difference]: Start difference. First operand has 179 places, 150 transitions, 937 flow. Second operand 105 states and 7184 transitions. [2022-11-18 20:28:23,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 837 transitions, 9460 flow [2022-11-18 20:28:23,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 837 transitions, 8658 flow, removed 261 selfloop flow, removed 19 redundant places. [2022-11-18 20:28:23,587 INFO L231 Difference]: Finished difference. Result has 300 places, 527 transitions, 6270 flow [2022-11-18 20:28:23,587 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=6270, PETRI_PLACES=300, PETRI_TRANSITIONS=527} [2022-11-18 20:28:23,588 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 197 predicate places. [2022-11-18 20:28:23,588 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 527 transitions, 6270 flow [2022-11-18 20:28:23,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 67.02941176470588) internal successors, (2279), 34 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:23,589 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:23,589 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 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] [2022-11-18 20:28:23,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:23,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:28:23,795 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1307541964, now seen corresponding path program 10 times [2022-11-18 20:28:23,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:23,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579449894] [2022-11-18 20:28:23,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:23,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:28:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579449894] [2022-11-18 20:28:23,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579449894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:23,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935390171] [2022-11-18 20:28:23,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:28:23,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:23,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:23,960 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:23,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:28:24,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:28:24,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:24,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:28:24,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:24,269 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:28:24,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:28:24,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935390171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:24,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:24,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-18 20:28:24,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750536790] [2022-11-18 20:28:24,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:24,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:28:24,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:24,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:28:24,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:28:24,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-18 20:28:24,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 527 transitions, 6270 flow. Second operand has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:24,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:24,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-18 20:28:24,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:26,645 INFO L130 PetriNetUnfolder]: 1077/6592 cut-off events. [2022-11-18 20:28:26,646 INFO L131 PetriNetUnfolder]: For 115963/116711 co-relation queries the response was YES. [2022-11-18 20:28:26,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28307 conditions, 6592 events. 1077/6592 cut-off events. For 115963/116711 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 81905 event pairs, 106 based on Foata normal form. 94/6123 useless extension candidates. Maximal degree in co-relation 28239. Up to 1044 conditions per place. [2022-11-18 20:28:26,730 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 220 selfloop transitions, 292 changer transitions 0/668 dead transitions. [2022-11-18 20:28:26,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 668 transitions, 9254 flow [2022-11-18 20:28:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:28:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 20:28:26,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2022-11-18 20:28:26,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9172413793103448 [2022-11-18 20:28:26,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2022-11-18 20:28:26,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2022-11-18 20:28:26,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:26,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2022-11-18 20:28:26,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:26,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:26,738 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:26,738 INFO L175 Difference]: Start difference. First operand has 300 places, 527 transitions, 6270 flow. Second operand 5 states and 532 transitions. [2022-11-18 20:28:26,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 668 transitions, 9254 flow [2022-11-18 20:28:27,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 668 transitions, 7367 flow, removed 887 selfloop flow, removed 14 redundant places. [2022-11-18 20:28:27,192 INFO L231 Difference]: Finished difference. Result has 282 places, 645 transitions, 7356 flow [2022-11-18 20:28:27,193 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4918, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7356, PETRI_PLACES=282, PETRI_TRANSITIONS=645} [2022-11-18 20:28:27,193 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 179 predicate places. [2022-11-18 20:28:27,194 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 645 transitions, 7356 flow [2022-11-18 20:28:27,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:27,195 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:27,195 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-18 20:28:27,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:27,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:28:27,402 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:27,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1243291946, now seen corresponding path program 11 times [2022-11-18 20:28:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:27,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590791371] [2022-11-18 20:28:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:28:27,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:27,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590791371] [2022-11-18 20:28:27,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590791371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:27,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759048619] [2022-11-18 20:28:27,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:28:27,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:27,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:27,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:27,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:28:28,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:28:28,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:28,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:28:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:28:28,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:28:29,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759048619] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:29,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:29,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-11-18 20:28:29,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543327268] [2022-11-18 20:28:29,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:29,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 20:28:29,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 20:28:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1233, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:28:29,643 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-18 20:28:29,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 645 transitions, 7356 flow. Second operand has 40 states, 40 states have (on average 88.15) internal successors, (3526), 40 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:29,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:29,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-18 20:28:29,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:31,105 INFO L130 PetriNetUnfolder]: 250/2221 cut-off events. [2022-11-18 20:28:31,105 INFO L131 PetriNetUnfolder]: For 39187/39519 co-relation queries the response was YES. [2022-11-18 20:28:31,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9128 conditions, 2221 events. 250/2221 cut-off events. For 39187/39519 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 21418 event pairs, 55 based on Foata normal form. 68/2079 useless extension candidates. Maximal degree in co-relation 9063. Up to 428 conditions per place. [2022-11-18 20:28:31,122 INFO L137 encePairwiseOnDemand]: 102/116 looper letters, 116 selfloop transitions, 17 changer transitions 62/280 dead transitions. [2022-11-18 20:28:31,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 280 transitions, 3434 flow [2022-11-18 20:28:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:28:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-18 20:28:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2049 transitions. [2022-11-18 20:28:31,127 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7679910044977512 [2022-11-18 20:28:31,127 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2049 transitions. [2022-11-18 20:28:31,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2049 transitions. [2022-11-18 20:28:31,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:31,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2049 transitions. [2022-11-18 20:28:31,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 89.08695652173913) internal successors, (2049), 23 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:31,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 116.0) internal successors, (2784), 24 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:31,139 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 116.0) internal successors, (2784), 24 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:31,139 INFO L175 Difference]: Start difference. First operand has 282 places, 645 transitions, 7356 flow. Second operand 23 states and 2049 transitions. [2022-11-18 20:28:31,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 280 transitions, 3434 flow [2022-11-18 20:28:31,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 280 transitions, 2694 flow, removed 193 selfloop flow, removed 34 redundant places. [2022-11-18 20:28:31,215 INFO L231 Difference]: Finished difference. Result has 225 places, 212 transitions, 1602 flow [2022-11-18 20:28:31,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1602, PETRI_PLACES=225, PETRI_TRANSITIONS=212} [2022-11-18 20:28:31,216 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 122 predicate places. [2022-11-18 20:28:31,216 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 212 transitions, 1602 flow [2022-11-18 20:28:31,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.15) internal successors, (3526), 40 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:31,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:31,218 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:31,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:31,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:28:31,424 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2076698023, now seen corresponding path program 12 times [2022-11-18 20:28:31,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:31,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977360928] [2022-11-18 20:28:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:31,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:33,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:33,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977360928] [2022-11-18 20:28:33,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977360928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:33,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169128175] [2022-11-18 20:28:33,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:28:33,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:33,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:33,066 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:33,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:28:33,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-18 20:28:33,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 20:28:33,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:34,736 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-11-18 20:28:34,736 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 26 treesize of output 10 [2022-11-18 20:28:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:28:34,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:35,145 INFO L321 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-11-18 20:28:35,146 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 27 treesize of output 19 [2022-11-18 20:28:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:28:35,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169128175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:35,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:35,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 49 [2022-11-18 20:28:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582442953] [2022-11-18 20:28:35,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:35,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 20:28:35,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:35,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 20:28:35,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2054, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:28:35,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-11-18 20:28:35,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 212 transitions, 1602 flow. Second operand has 49 states, 49 states have (on average 59.38775510204081) internal successors, (2910), 49 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:35,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:35,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-11-18 20:28:35,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:41,481 INFO L130 PetriNetUnfolder]: 866/4948 cut-off events. [2022-11-18 20:28:41,481 INFO L131 PetriNetUnfolder]: For 31318/31819 co-relation queries the response was YES. [2022-11-18 20:28:41,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16251 conditions, 4948 events. 866/4948 cut-off events. For 31318/31819 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 56300 event pairs, 12 based on Foata normal form. 78/4633 useless extension candidates. Maximal degree in co-relation 16214. Up to 778 conditions per place. [2022-11-18 20:28:41,522 INFO L137 encePairwiseOnDemand]: 85/116 looper letters, 241 selfloop transitions, 318 changer transitions 90/695 dead transitions. [2022-11-18 20:28:41,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 695 transitions, 8261 flow [2022-11-18 20:28:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 20:28:41,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-18 20:28:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4323 transitions. [2022-11-18 20:28:41,530 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5176005747126436 [2022-11-18 20:28:41,530 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4323 transitions. [2022-11-18 20:28:41,530 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4323 transitions. [2022-11-18 20:28:41,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:41,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4323 transitions. [2022-11-18 20:28:41,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 60.041666666666664) internal successors, (4323), 72 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:41,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 116.0) internal successors, (8468), 73 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:41,552 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 116.0) internal successors, (8468), 73 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:41,553 INFO L175 Difference]: Start difference. First operand has 225 places, 212 transitions, 1602 flow. Second operand 72 states and 4323 transitions. [2022-11-18 20:28:41,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 695 transitions, 8261 flow [2022-11-18 20:28:41,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 695 transitions, 7133 flow, removed 452 selfloop flow, removed 24 redundant places. [2022-11-18 20:28:41,632 INFO L231 Difference]: Finished difference. Result has 277 places, 510 transitions, 5738 flow [2022-11-18 20:28:41,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=5738, PETRI_PLACES=277, PETRI_TRANSITIONS=510} [2022-11-18 20:28:41,633 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 174 predicate places. [2022-11-18 20:28:41,634 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 510 transitions, 5738 flow [2022-11-18 20:28:41,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 59.38775510204081) internal successors, (2910), 49 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:41,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:41,635 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:41,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:41,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:28:41,847 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:41,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash 810338045, now seen corresponding path program 13 times [2022-11-18 20:28:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:41,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033621036] [2022-11-18 20:28:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:43,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:43,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033621036] [2022-11-18 20:28:43,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033621036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:43,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252848394] [2022-11-18 20:28:43,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:28:43,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:43,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:43,080 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:43,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:28:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-18 20:28:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:43,918 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 19 treesize of output 7 [2022-11-18 20:28:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:28:43,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:44,052 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:28:44,052 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 28 treesize of output 13 [2022-11-18 20:28:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-18 20:28:44,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252848394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:44,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:44,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 10] total 35 [2022-11-18 20:28:44,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987186004] [2022-11-18 20:28:44,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:44,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:28:44,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:28:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:28:44,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-18 20:28:44,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 510 transitions, 5738 flow. Second operand has 35 states, 35 states have (on average 63.857142857142854) internal successors, (2235), 35 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:44,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:44,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-18 20:28:44,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:48,656 INFO L130 PetriNetUnfolder]: 1094/6015 cut-off events. [2022-11-18 20:28:48,656 INFO L131 PetriNetUnfolder]: For 38177/38937 co-relation queries the response was YES. [2022-11-18 20:28:48,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21581 conditions, 6015 events. 1094/6015 cut-off events. For 38177/38937 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 69866 event pairs, 5 based on Foata normal form. 160/5738 useless extension candidates. Maximal degree in co-relation 21523. Up to 888 conditions per place. [2022-11-18 20:28:48,705 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 353 selfloop transitions, 390 changer transitions 221/1014 dead transitions. [2022-11-18 20:28:48,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1014 transitions, 13544 flow [2022-11-18 20:28:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-18 20:28:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-11-18 20:28:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4842 transitions. [2022-11-18 20:28:48,713 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5565517241379311 [2022-11-18 20:28:48,713 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4842 transitions. [2022-11-18 20:28:48,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4842 transitions. [2022-11-18 20:28:48,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:48,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4842 transitions. [2022-11-18 20:28:48,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 64.56) internal successors, (4842), 75 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:48,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 116.0) internal successors, (8816), 76 states have internal predecessors, (8816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:48,735 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 116.0) internal successors, (8816), 76 states have internal predecessors, (8816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:48,736 INFO L175 Difference]: Start difference. First operand has 277 places, 510 transitions, 5738 flow. Second operand 75 states and 4842 transitions. [2022-11-18 20:28:48,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1014 transitions, 13544 flow [2022-11-18 20:28:48,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1014 transitions, 12876 flow, removed 308 selfloop flow, removed 28 redundant places. [2022-11-18 20:28:48,966 INFO L231 Difference]: Finished difference. Result has 335 places, 590 transitions, 7564 flow [2022-11-18 20:28:48,967 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=5416, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=7564, PETRI_PLACES=335, PETRI_TRANSITIONS=590} [2022-11-18 20:28:48,967 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 232 predicate places. [2022-11-18 20:28:48,968 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 590 transitions, 7564 flow [2022-11-18 20:28:48,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 63.857142857142854) internal successors, (2235), 35 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:48,968 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:48,969 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:48,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-18 20:28:49,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:28:49,181 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash -674985559, now seen corresponding path program 14 times [2022-11-18 20:28:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:49,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112475354] [2022-11-18 20:28:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:50,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112475354] [2022-11-18 20:28:50,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112475354] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:50,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658328413] [2022-11-18 20:28:50,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:28:50,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:50,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:50,278 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:50,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:28:50,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:28:50,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:50,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:28:50,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:28:50,958 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 19 treesize of output 7 [2022-11-18 20:28:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:28:50,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:28:51,165 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:28:51,166 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 28 treesize of output 13 [2022-11-18 20:28:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:28:51,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658328413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:28:51,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:28:51,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 11] total 32 [2022-11-18 20:28:51,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131291914] [2022-11-18 20:28:51,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:28:51,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:28:51,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:28:51,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:28:51,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:28:51,361 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-18 20:28:51,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 590 transitions, 7564 flow. Second operand has 32 states, 32 states have (on average 63.96875) internal successors, (2047), 32 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:51,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:28:51,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-18 20:28:51,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:28:56,162 INFO L130 PetriNetUnfolder]: 1234/6832 cut-off events. [2022-11-18 20:28:56,162 INFO L131 PetriNetUnfolder]: For 49456/50239 co-relation queries the response was YES. [2022-11-18 20:28:56,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25192 conditions, 6832 events. 1234/6832 cut-off events. For 49456/50239 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 82772 event pairs, 14 based on Foata normal form. 138/6452 useless extension candidates. Maximal degree in co-relation 25117. Up to 982 conditions per place. [2022-11-18 20:28:56,235 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 417 selfloop transitions, 441 changer transitions 154/1062 dead transitions. [2022-11-18 20:28:56,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1062 transitions, 14851 flow [2022-11-18 20:28:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:28:56,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-18 20:28:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3595 transitions. [2022-11-18 20:28:56,243 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5634796238244514 [2022-11-18 20:28:56,243 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3595 transitions. [2022-11-18 20:28:56,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3595 transitions. [2022-11-18 20:28:56,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:28:56,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3595 transitions. [2022-11-18 20:28:56,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 65.36363636363636) internal successors, (3595), 55 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:56,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 116.0) internal successors, (6496), 56 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:56,262 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 116.0) internal successors, (6496), 56 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:56,262 INFO L175 Difference]: Start difference. First operand has 335 places, 590 transitions, 7564 flow. Second operand 55 states and 3595 transitions. [2022-11-18 20:28:56,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1062 transitions, 14851 flow [2022-11-18 20:28:56,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1062 transitions, 14391 flow, removed 180 selfloop flow, removed 40 redundant places. [2022-11-18 20:28:56,596 INFO L231 Difference]: Finished difference. Result has 334 places, 641 transitions, 8971 flow [2022-11-18 20:28:56,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=8971, PETRI_PLACES=334, PETRI_TRANSITIONS=641} [2022-11-18 20:28:56,598 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 231 predicate places. [2022-11-18 20:28:56,598 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 641 transitions, 8971 flow [2022-11-18 20:28:56,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.96875) internal successors, (2047), 32 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:28:56,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:28:56,599 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:28:56,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:28:56,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:28:56,806 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:28:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:28:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash 139201719, now seen corresponding path program 15 times [2022-11-18 20:28:56,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:28:56,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006104450] [2022-11-18 20:28:56,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:28:56,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:28:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:28:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:28:58,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:28:58,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006104450] [2022-11-18 20:28:58,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006104450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:28:58,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128531268] [2022-11-18 20:28:58,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:28:58,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:28:58,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:28:58,211 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:28:58,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:28:58,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:28:58,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:28:58,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 20:28:58,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:00,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:00,707 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 19 treesize of output 21 [2022-11-18 20:29:00,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:29:00,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:00,990 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 10 [2022-11-18 20:29:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:01,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:01,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:01,613 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 45 treesize of output 42 [2022-11-18 20:29:01,621 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 13 treesize of output 7 [2022-11-18 20:29:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:05,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128531268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:05,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:05,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29, 29] total 69 [2022-11-18 20:29:05,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012665112] [2022-11-18 20:29:05,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:05,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 20:29:05,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:05,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 20:29:05,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=4316, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 20:29:05,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 116 [2022-11-18 20:29:05,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 641 transitions, 8971 flow. Second operand has 69 states, 69 states have (on average 49.53623188405797) internal successors, (3418), 69 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:05,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:05,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 116 [2022-11-18 20:29:05,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:16,567 INFO L130 PetriNetUnfolder]: 2700/15752 cut-off events. [2022-11-18 20:29:16,567 INFO L131 PetriNetUnfolder]: For 114814/116244 co-relation queries the response was YES. [2022-11-18 20:29:16,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56888 conditions, 15752 events. 2700/15752 cut-off events. For 114814/116244 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 223898 event pairs, 0 based on Foata normal form. 281/14731 useless extension candidates. Maximal degree in co-relation 56827. Up to 2141 conditions per place. [2022-11-18 20:29:16,714 INFO L137 encePairwiseOnDemand]: 88/116 looper letters, 219 selfloop transitions, 227 changer transitions 1018/1504 dead transitions. [2022-11-18 20:29:16,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1504 transitions, 23932 flow [2022-11-18 20:29:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:29:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-18 20:29:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3634 transitions. [2022-11-18 20:29:16,722 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4412336085478388 [2022-11-18 20:29:16,722 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3634 transitions. [2022-11-18 20:29:16,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3634 transitions. [2022-11-18 20:29:16,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:16,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3634 transitions. [2022-11-18 20:29:16,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 51.183098591549296) internal successors, (3634), 71 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:16,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 116.0) internal successors, (8352), 72 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:16,741 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 116.0) internal successors, (8352), 72 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:16,741 INFO L175 Difference]: Start difference. First operand has 334 places, 641 transitions, 8971 flow. Second operand 71 states and 3634 transitions. [2022-11-18 20:29:16,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1504 transitions, 23932 flow [2022-11-18 20:29:17,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1504 transitions, 22916 flow, removed 249 selfloop flow, removed 39 redundant places. [2022-11-18 20:29:17,629 INFO L231 Difference]: Finished difference. Result has 384 places, 388 transitions, 5259 flow [2022-11-18 20:29:17,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=8463, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=5259, PETRI_PLACES=384, PETRI_TRANSITIONS=388} [2022-11-18 20:29:17,630 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 281 predicate places. [2022-11-18 20:29:17,630 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 388 transitions, 5259 flow [2022-11-18 20:29:17,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 49.53623188405797) internal successors, (3418), 69 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:17,631 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:17,631 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:17,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:17,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:17,837 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:29:17,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:17,837 INFO L85 PathProgramCache]: Analyzing trace with hash -623407913, now seen corresponding path program 16 times [2022-11-18 20:29:17,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:17,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268990622] [2022-11-18 20:29:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:17,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 20:29:18,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:18,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268990622] [2022-11-18 20:29:18,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268990622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:18,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235267494] [2022-11-18 20:29:18,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:29:18,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:18,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:18,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:18,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:29:18,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:29:18,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:18,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:29:18,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 20:29:19,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 33 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-18 20:29:20,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235267494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:20,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:20,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 48 [2022-11-18 20:29:20,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866081737] [2022-11-18 20:29:20,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:20,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 20:29:20,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 20:29:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1809, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:29:20,267 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-18 20:29:20,272 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 388 transitions, 5259 flow. Second operand has 48 states, 48 states have (on average 88.16666666666667) internal successors, (4232), 48 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:20,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:20,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-18 20:29:20,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:22,544 INFO L130 PetriNetUnfolder]: 552/3992 cut-off events. [2022-11-18 20:29:22,545 INFO L131 PetriNetUnfolder]: For 33867/34126 co-relation queries the response was YES. [2022-11-18 20:29:22,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14468 conditions, 3992 events. 552/3992 cut-off events. For 33867/34126 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 43384 event pairs, 134 based on Foata normal form. 32/3664 useless extension candidates. Maximal degree in co-relation 14389. Up to 969 conditions per place. [2022-11-18 20:29:22,595 INFO L137 encePairwiseOnDemand]: 102/116 looper letters, 234 selfloop transitions, 20 changer transitions 60/404 dead transitions. [2022-11-18 20:29:22,595 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 404 transitions, 5891 flow [2022-11-18 20:29:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:29:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-18 20:29:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2396 transitions. [2022-11-18 20:29:22,599 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7650063856960408 [2022-11-18 20:29:22,599 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2396 transitions. [2022-11-18 20:29:22,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2396 transitions. [2022-11-18 20:29:22,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:22,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2396 transitions. [2022-11-18 20:29:22,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 88.74074074074075) internal successors, (2396), 27 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) [2022-11-18 20:29:22,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:22,609 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:22,609 INFO L175 Difference]: Start difference. First operand has 384 places, 388 transitions, 5259 flow. Second operand 27 states and 2396 transitions. [2022-11-18 20:29:22,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 404 transitions, 5891 flow [2022-11-18 20:29:22,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 404 transitions, 5456 flow, removed 117 selfloop flow, removed 56 redundant places. [2022-11-18 20:29:22,802 INFO L231 Difference]: Finished difference. Result has 325 places, 337 transitions, 4185 flow [2022-11-18 20:29:22,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4594, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4185, PETRI_PLACES=325, PETRI_TRANSITIONS=337} [2022-11-18 20:29:22,803 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 222 predicate places. [2022-11-18 20:29:22,803 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 337 transitions, 4185 flow [2022-11-18 20:29:22,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 88.16666666666667) internal successors, (4232), 48 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:22,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:22,804 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:22,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:23,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-18 20:29:23,010 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:29:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1203872484, now seen corresponding path program 17 times [2022-11-18 20:29:23,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:23,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764062073] [2022-11-18 20:29:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:29:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764062073] [2022-11-18 20:29:23,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764062073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642368842] [2022-11-18 20:29:23,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:29:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:23,175 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:23,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:29:23,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:29:23,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:29:23,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:29:23,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:29:23,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642368842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:23,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:23,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-11-18 20:29:23,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086130985] [2022-11-18 20:29:23,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:23,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:29:23,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:23,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:29:23,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:29:23,687 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-18 20:29:23,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 337 transitions, 4185 flow. Second operand has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:23,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:23,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-18 20:29:23,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:25,097 INFO L130 PetriNetUnfolder]: 934/5825 cut-off events. [2022-11-18 20:29:25,098 INFO L131 PetriNetUnfolder]: For 43075/43412 co-relation queries the response was YES. [2022-11-18 20:29:25,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20231 conditions, 5825 events. 934/5825 cut-off events. For 43075/43412 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 69711 event pairs, 214 based on Foata normal form. 68/5402 useless extension candidates. Maximal degree in co-relation 20172. Up to 1200 conditions per place. [2022-11-18 20:29:25,172 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 106 selfloop transitions, 245 changer transitions 1/471 dead transitions. [2022-11-18 20:29:25,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 471 transitions, 7120 flow [2022-11-18 20:29:25,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:29:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 20:29:25,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2022-11-18 20:29:25,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9181034482758621 [2022-11-18 20:29:25,174 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2022-11-18 20:29:25,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2022-11-18 20:29:25,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:25,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2022-11-18 20:29:25,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:25,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:25,178 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:25,178 INFO L175 Difference]: Start difference. First operand has 325 places, 337 transitions, 4185 flow. Second operand 6 states and 639 transitions. [2022-11-18 20:29:25,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 471 transitions, 7120 flow [2022-11-18 20:29:25,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 471 transitions, 7004 flow, removed 26 selfloop flow, removed 27 redundant places. [2022-11-18 20:29:25,384 INFO L231 Difference]: Finished difference. Result has 278 places, 458 transitions, 7129 flow [2022-11-18 20:29:25,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7129, PETRI_PLACES=278, PETRI_TRANSITIONS=458} [2022-11-18 20:29:25,385 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 175 predicate places. [2022-11-18 20:29:25,386 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 458 transitions, 7129 flow [2022-11-18 20:29:25,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:25,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:25,387 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:25,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:25,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:25,593 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:29:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1796332850, now seen corresponding path program 18 times [2022-11-18 20:29:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:25,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124521256] [2022-11-18 20:29:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:25,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:26,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:26,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124521256] [2022-11-18 20:29:26,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124521256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:26,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316833183] [2022-11-18 20:29:26,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:29:26,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:26,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:26,864 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:26,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:29:27,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:29:27,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:27,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-18 20:29:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:28,178 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 15 treesize of output 7 [2022-11-18 20:29:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:29:28,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:28,331 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:29:28,332 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 28 treesize of output 13 [2022-11-18 20:29:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 20:29:28,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316833183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:28,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:28,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 12] total 36 [2022-11-18 20:29:28,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212457036] [2022-11-18 20:29:28,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:28,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:29:28,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:28,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:29:28,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:29:28,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-18 20:29:28,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 458 transitions, 7129 flow. Second operand has 36 states, 36 states have (on average 63.25) internal successors, (2277), 36 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:28,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:28,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-18 20:29:28,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:35,151 INFO L130 PetriNetUnfolder]: 1637/9026 cut-off events. [2022-11-18 20:29:35,151 INFO L131 PetriNetUnfolder]: For 81820/81871 co-relation queries the response was YES. [2022-11-18 20:29:35,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34935 conditions, 9026 events. 1637/9026 cut-off events. For 81820/81871 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 114141 event pairs, 0 based on Foata normal form. 34/8304 useless extension candidates. Maximal degree in co-relation 34881. Up to 2064 conditions per place. [2022-11-18 20:29:35,223 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 291 selfloop transitions, 469 changer transitions 215/1025 dead transitions. [2022-11-18 20:29:35,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1025 transitions, 16056 flow [2022-11-18 20:29:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-18 20:29:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-11-18 20:29:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 8169 transitions. [2022-11-18 20:29:35,235 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5589080459770115 [2022-11-18 20:29:35,235 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 8169 transitions. [2022-11-18 20:29:35,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 8169 transitions. [2022-11-18 20:29:35,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:35,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 8169 transitions. [2022-11-18 20:29:35,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 64.83333333333333) internal successors, (8169), 126 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:35,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 116.0) internal successors, (14732), 127 states have internal predecessors, (14732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:35,268 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 116.0) internal successors, (14732), 127 states have internal predecessors, (14732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:35,269 INFO L175 Difference]: Start difference. First operand has 278 places, 458 transitions, 7129 flow. Second operand 126 states and 8169 transitions. [2022-11-18 20:29:35,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1025 transitions, 16056 flow [2022-11-18 20:29:35,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1025 transitions, 15950 flow, removed 53 selfloop flow, removed 0 redundant places. [2022-11-18 20:29:35,520 INFO L231 Difference]: Finished difference. Result has 447 places, 593 transitions, 11353 flow [2022-11-18 20:29:35,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=7117, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=11353, PETRI_PLACES=447, PETRI_TRANSITIONS=593} [2022-11-18 20:29:35,521 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 344 predicate places. [2022-11-18 20:29:35,521 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 593 transitions, 11353 flow [2022-11-18 20:29:35,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 63.25) internal successors, (2277), 36 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:35,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:35,522 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:35,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:35,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:35,723 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:29:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1580446446, now seen corresponding path program 19 times [2022-11-18 20:29:35,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:35,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299929552] [2022-11-18 20:29:35,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:35,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:37,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299929552] [2022-11-18 20:29:37,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299929552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110433074] [2022-11-18 20:29:37,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:29:37,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:37,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:37,072 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:37,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:29:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:37,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 20:29:37,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:38,146 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 15 treesize of output 7 [2022-11-18 20:29:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:29:38,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:38,329 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-18 20:29:38,330 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 28 treesize of output 13 [2022-11-18 20:29:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:29:38,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110433074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:38,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:38,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 13] total 36 [2022-11-18 20:29:38,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499419351] [2022-11-18 20:29:38,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:38,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:29:38,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:38,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:29:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:29:38,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-18 20:29:38,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 593 transitions, 11353 flow. Second operand has 36 states, 36 states have (on average 63.27777777777778) internal successors, (2278), 36 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:38,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:38,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-18 20:29:38,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:29:44,587 INFO L130 PetriNetUnfolder]: 1748/9607 cut-off events. [2022-11-18 20:29:44,587 INFO L131 PetriNetUnfolder]: For 109063/109113 co-relation queries the response was YES. [2022-11-18 20:29:44,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39796 conditions, 9607 events. 1748/9607 cut-off events. For 109063/109113 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 123463 event pairs, 0 based on Foata normal form. 14/8805 useless extension candidates. Maximal degree in co-relation 39697. Up to 2219 conditions per place. [2022-11-18 20:29:44,716 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 274 selfloop transitions, 495 changer transitions 127/946 dead transitions. [2022-11-18 20:29:44,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 946 transitions, 17105 flow [2022-11-18 20:29:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-18 20:29:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-18 20:29:44,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5436 transitions. [2022-11-18 20:29:44,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5646032405484005 [2022-11-18 20:29:44,724 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5436 transitions. [2022-11-18 20:29:44,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5436 transitions. [2022-11-18 20:29:44,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:29:44,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5436 transitions. [2022-11-18 20:29:44,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 65.49397590361446) internal successors, (5436), 83 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:44,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 116.0) internal successors, (9744), 84 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:44,748 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 116.0) internal successors, (9744), 84 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:44,748 INFO L175 Difference]: Start difference. First operand has 447 places, 593 transitions, 11353 flow. Second operand 83 states and 5436 transitions. [2022-11-18 20:29:44,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 946 transitions, 17105 flow [2022-11-18 20:29:45,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 946 transitions, 15800 flow, removed 309 selfloop flow, removed 59 redundant places. [2022-11-18 20:29:45,230 INFO L231 Difference]: Finished difference. Result has 448 places, 619 transitions, 11744 flow [2022-11-18 20:29:45,231 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=10135, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=11744, PETRI_PLACES=448, PETRI_TRANSITIONS=619} [2022-11-18 20:29:45,231 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 345 predicate places. [2022-11-18 20:29:45,231 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 619 transitions, 11744 flow [2022-11-18 20:29:45,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 63.27777777777778) internal successors, (2278), 36 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:45,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:29:45,232 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:29:45,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:29:45,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 20:29:45,438 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:29:45,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:29:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash -326036542, now seen corresponding path program 20 times [2022-11-18 20:29:45,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:29:45,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502801645] [2022-11-18 20:29:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:29:45,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:29:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:29:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:46,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:29:46,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502801645] [2022-11-18 20:29:46,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502801645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:46,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462796259] [2022-11-18 20:29:46,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:29:46,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:29:46,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:29:46,968 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:29:46,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:29:47,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:29:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:29:47,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:29:47,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:29:48,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:29:48,984 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 19 treesize of output 21 [2022-11-18 20:29:49,332 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-18 20:29:49,332 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 10 [2022-11-18 20:29:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:49,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:50,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:29:50,097 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 45 treesize of output 42 [2022-11-18 20:29:50,105 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 13 treesize of output 7 [2022-11-18 20:29:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:29:55,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462796259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:29:55,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:29:55,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 33, 33] total 80 [2022-11-18 20:29:55,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782608251] [2022-11-18 20:29:55,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:55,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-18 20:29:55,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:55,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-18 20:29:55,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=5869, Unknown=1, NotChecked=0, Total=6320 [2022-11-18 20:29:55,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 116 [2022-11-18 20:29:55,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 619 transitions, 11744 flow. Second operand has 80 states, 80 states have (on average 53.425) internal successors, (4274), 80 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:29:55,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:29:55,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 116 [2022-11-18 20:29:55,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:30:31,016 INFO L130 PetriNetUnfolder]: 6973/41255 cut-off events. [2022-11-18 20:30:31,016 INFO L131 PetriNetUnfolder]: For 474798/475138 co-relation queries the response was YES. [2022-11-18 20:30:31,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166217 conditions, 41255 events. 6973/41255 cut-off events. For 474798/475138 co-relation queries the response was YES. Maximal size of possible extension queue 2093. Compared 664399 event pairs, 20 based on Foata normal form. 207/37947 useless extension candidates. Maximal degree in co-relation 166139. Up to 9086 conditions per place. [2022-11-18 20:30:31,503 INFO L137 encePairwiseOnDemand]: 86/116 looper letters, 618 selfloop transitions, 1481 changer transitions 1109/3251 dead transitions. [2022-11-18 20:30:31,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 3251 transitions, 76422 flow [2022-11-18 20:30:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-18 20:30:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-11-18 20:30:31,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 6142 transitions. [2022-11-18 20:30:31,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2022-11-18 20:30:31,516 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 6142 transitions. [2022-11-18 20:30:31,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 6142 transitions. [2022-11-18 20:30:31,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:30:31,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 6142 transitions. [2022-11-18 20:30:31,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 55.333333333333336) internal successors, (6142), 111 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:31,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 116.0) internal successors, (12992), 112 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:31,561 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 116.0) internal successors, (12992), 112 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:31,561 INFO L175 Difference]: Start difference. First operand has 448 places, 619 transitions, 11744 flow. Second operand 111 states and 6142 transitions. [2022-11-18 20:30:31,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 3251 transitions, 76422 flow [2022-11-18 20:30:35,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 3251 transitions, 74169 flow, removed 607 selfloop flow, removed 59 redundant places. [2022-11-18 20:30:35,500 INFO L231 Difference]: Finished difference. Result has 548 places, 1762 transitions, 42432 flow [2022-11-18 20:30:35,501 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=11261, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=42432, PETRI_PLACES=548, PETRI_TRANSITIONS=1762} [2022-11-18 20:30:35,501 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 445 predicate places. [2022-11-18 20:30:35,501 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 1762 transitions, 42432 flow [2022-11-18 20:30:35,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 53.425) internal successors, (4274), 80 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:35,503 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:30:35,503 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:30:35,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:30:35,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 20:30:35,710 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:30:35,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:30:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash 327816064, now seen corresponding path program 21 times [2022-11-18 20:30:35,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:30:35,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520839201] [2022-11-18 20:30:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:30:35,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:30:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:30:37,550 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:30:37,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:30:37,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520839201] [2022-11-18 20:30:37,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520839201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:30:37,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265800675] [2022-11-18 20:30:37,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:30:37,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:30:37,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:30:37,553 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:30:37,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:30:38,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:30:38,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:30:38,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:30:38,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:30:39,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:30:39,916 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 21 treesize of output 23 [2022-11-18 20:30:40,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:30:40,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:40,751 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 10 [2022-11-18 20:30:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:30:40,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:30:41,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:30:41,219 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 47 treesize of output 37 [2022-11-18 20:30:41,249 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 10 treesize of output 3 [2022-11-18 20:30:44,360 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:30:44,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265800675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:30:44,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:30:44,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 76 [2022-11-18 20:30:44,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570718320] [2022-11-18 20:30:44,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:30:44,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-18 20:30:44,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:30:44,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-18 20:30:44,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=5225, Unknown=0, NotChecked=0, Total=5700 [2022-11-18 20:30:44,368 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 116 [2022-11-18 20:30:44,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 1762 transitions, 42432 flow. Second operand has 76 states, 76 states have (on average 49.671052631578945) internal successors, (3775), 76 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:30:44,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:30:44,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 116 [2022-11-18 20:30:44,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:31:25,733 INFO L130 PetriNetUnfolder]: 6909/44157 cut-off events. [2022-11-18 20:31:25,733 INFO L131 PetriNetUnfolder]: For 919836/921391 co-relation queries the response was YES. [2022-11-18 20:31:26,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215980 conditions, 44157 events. 6909/44157 cut-off events. For 919836/921391 co-relation queries the response was YES. Maximal size of possible extension queue 2629. Compared 742199 event pairs, 180 based on Foata normal form. 508/40548 useless extension candidates. Maximal degree in co-relation 215853. Up to 10354 conditions per place. [2022-11-18 20:31:26,725 INFO L137 encePairwiseOnDemand]: 83/116 looper letters, 1578 selfloop transitions, 1147 changer transitions 229/2994 dead transitions. [2022-11-18 20:31:26,725 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 2994 transitions, 75810 flow [2022-11-18 20:31:26,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-11-18 20:31:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2022-11-18 20:31:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 5576 transitions. [2022-11-18 20:31:26,734 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44099968364441633 [2022-11-18 20:31:26,734 INFO L72 ComplementDD]: Start complementDD. Operand 109 states and 5576 transitions. [2022-11-18 20:31:26,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 109 states and 5576 transitions. [2022-11-18 20:31:26,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:31:26,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 109 states and 5576 transitions. [2022-11-18 20:31:26,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 110 states, 109 states have (on average 51.15596330275229) internal successors, (5576), 109 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:26,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 110 states, 110 states have (on average 116.0) internal successors, (12760), 110 states have internal predecessors, (12760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:26,765 INFO L81 ComplementDD]: Finished complementDD. Result has 110 states, 110 states have (on average 116.0) internal successors, (12760), 110 states have internal predecessors, (12760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:26,765 INFO L175 Difference]: Start difference. First operand has 548 places, 1762 transitions, 42432 flow. Second operand 109 states and 5576 transitions. [2022-11-18 20:31:26,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 2994 transitions, 75810 flow [2022-11-18 20:31:38,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 2994 transitions, 72722 flow, removed 1469 selfloop flow, removed 47 redundant places. [2022-11-18 20:31:38,926 INFO L231 Difference]: Finished difference. Result has 622 places, 2625 transitions, 64939 flow [2022-11-18 20:31:38,927 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=41022, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=429, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_STATES=109, PETRI_FLOW=64939, PETRI_PLACES=622, PETRI_TRANSITIONS=2625} [2022-11-18 20:31:38,928 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 519 predicate places. [2022-11-18 20:31:38,928 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 2625 transitions, 64939 flow [2022-11-18 20:31:38,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 49.671052631578945) internal successors, (3775), 76 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:38,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:31:38,929 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:38,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:39,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:39,130 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:31:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:39,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1521406748, now seen corresponding path program 22 times [2022-11-18 20:31:39,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:39,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620082245] [2022-11-18 20:31:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:39,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:39,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:41,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:41,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620082245] [2022-11-18 20:31:41,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620082245] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:31:41,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673748535] [2022-11-18 20:31:41,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:31:41,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:41,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:41,345 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:41,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26290dc1-2406-48ba-8771-d41dd71d6a62/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:31:41,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:31:41,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:31:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 20:31:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:43,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:43,024 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 19 treesize of output 21 [2022-11-18 20:31:43,317 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 19 treesize of output 7 [2022-11-18 20:31:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:31:43,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:31:43,568 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)) 5)) is different from false [2022-11-18 20:31:43,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:31:43,593 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 47 treesize of output 37 [2022-11-18 20:31:43,598 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 10 treesize of output 3 [2022-11-18 20:31:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:31:44,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673748535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:31:44,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:31:44,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27, 20] total 66 [2022-11-18 20:31:44,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535836308] [2022-11-18 20:31:44,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:31:44,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 20:31:44,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 20:31:44,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3910, Unknown=1, NotChecked=126, Total=4290 [2022-11-18 20:31:44,535 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 116 [2022-11-18 20:31:44,539 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 2625 transitions, 64939 flow. Second operand has 66 states, 66 states have (on average 55.56060606060606) internal successors, (3667), 66 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:44,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:31:44,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 116 [2022-11-18 20:31:44,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand