./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a --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 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 --- 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-b5237d8 [2022-11-21 16:34:51,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:34:51,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:34:51,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:34:51,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:34:51,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:34:51,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:34:51,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:34:51,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:34:51,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:34:51,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:34:51,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:34:51,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:34:51,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:34:51,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:34:51,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:34:51,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:34:51,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:34:51,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:34:51,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:34:51,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:34:51,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:34:51,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:34:51,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:34:51,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:34:51,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:34:51,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:34:51,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:34:51,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:34:51,930 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:34:51,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:34:51,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:34:51,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:34:51,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:34:51,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:34:51,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:34:51,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:34:51,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:34:51,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:34:51,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:34:51,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:34:51,947 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:34:51,987 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:34:51,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:34:51,988 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:34:51,988 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:34:51,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:34:51,990 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:34:51,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:34:51,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:34:51,991 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:34:51,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:34:51,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:34:51,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:34:51,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:34:51,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:34:51,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:34:51,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:34:51,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:34:51,994 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:34:51,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:34:51,995 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:34:51,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:34:51,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:34:51,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:34:51,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:34:51,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:34:51,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:34:51,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:34:51,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:34:51,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:34:51,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:34:51,998 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:34:51,998 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:34:51,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:34:51,998 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_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8978d351a1e877bd44e157215d417b40c01c7c886849af3efe046b60ddaacc95 [2022-11-21 16:34:52,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:34:52,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:34:52,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:34:52,437 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:34:52,439 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:34:52,441 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-21 16:34:55,505 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:34:55,703 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:34:55,704 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/sv-benchmarks/c/weaver/popl20-figure3.wvr.c [2022-11-21 16:34:55,711 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/data/13b722924/d36266d433fd4ad4bcd285e772547c95/FLAG3919dc064 [2022-11-21 16:34:55,729 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/data/13b722924/d36266d433fd4ad4bcd285e772547c95 [2022-11-21 16:34:55,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:34:55,737 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:34:55,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:34:55,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:34:55,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:34:55,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:34:55" (1/1) ... [2022-11-21 16:34:55,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730fad8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:55, skipping insertion in model container [2022-11-21 16:34:55,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:34:55" (1/1) ... [2022-11-21 16:34:55,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:34:55,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:34:56,015 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-21 16:34:56,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:34:56,033 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:34:56,052 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/sv-benchmarks/c/weaver/popl20-figure3.wvr.c[2121,2134] [2022-11-21 16:34:56,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:34:56,068 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:34:56,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56 WrapperNode [2022-11-21 16:34:56,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:34:56,069 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:34:56,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:34:56,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:34:56,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,084 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,103 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2022-11-21 16:34:56,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:34:56,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:34:56,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:34:56,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:34:56,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,124 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:34:56,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:34:56,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:34:56,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:34:56,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (1/1) ... [2022-11-21 16:34:56,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:34:56,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:34:56,182 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:34:56,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:34:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:34:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:34:56,241 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:34:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:34:56,242 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:34:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:34:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:34:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:34:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:34:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:34:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:34:56,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:34:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:34:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:34:56,247 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:34:56,375 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:34:56,377 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:34:56,592 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:34:56,624 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:34:56,625 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 16:34:56,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:34:56 BoogieIcfgContainer [2022-11-21 16:34:56,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:34:56,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:34:56,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:34:56,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:34:56,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:34:55" (1/3) ... [2022-11-21 16:34:56,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377b9fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:34:56, skipping insertion in model container [2022-11-21 16:34:56,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:34:56" (2/3) ... [2022-11-21 16:34:56,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377b9fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:34:56, skipping insertion in model container [2022-11-21 16:34:56,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:34:56" (3/3) ... [2022-11-21 16:34:56,646 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2022-11-21 16:34:56,655 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:34:56,663 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:34:56,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:34:56,663 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:34:56,747 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 16:34:56,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-11-21 16:34:56,851 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-11-21 16:34:56,851 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:34:56,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-21 16:34:56,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-11-21 16:34:56,863 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-11-21 16:34:56,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:34:56,885 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;@9283a20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:34:56,885 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 16:34:56,917 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-11-21 16:34:56,918 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:34:56,918 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:34:56,919 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] [2022-11-21 16:34:56,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:34:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:56,932 INFO L85 PathProgramCache]: Analyzing trace with hash 737481402, now seen corresponding path program 1 times [2022-11-21 16:34:56,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:56,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248490902] [2022-11-21 16:34:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:56,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:57,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:57,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248490902] [2022-11-21 16:34:57,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248490902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:57,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:34:57,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:34:57,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563738243] [2022-11-21 16:34:57,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:57,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:34:57,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:57,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:34:57,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:34:57,257 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 87 [2022-11-21 16:34:57,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:57,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:34:57,267 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 87 [2022-11-21 16:34:57,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:34:57,330 INFO L130 PetriNetUnfolder]: 5/83 cut-off events. [2022-11-21 16:34:57,331 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-21 16:34:57,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 83 events. 5/83 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 67 event pairs, 1 based on Foata normal form. 8/85 useless extension candidates. Maximal degree in co-relation 49. Up to 10 conditions per place. [2022-11-21 16:34:57,334 INFO L137 encePairwiseOnDemand]: 83/87 looper letters, 5 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-11-21 16:34:57,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 166 flow [2022-11-21 16:34:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:34:57,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:34:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 163 transitions. [2022-11-21 16:34:57,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9367816091954023 [2022-11-21 16:34:57,358 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 163 transitions. [2022-11-21 16:34:57,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 163 transitions. [2022-11-21 16:34:57,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:34:57,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 163 transitions. [2022-11-21 16:34:57,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 81.5) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:57,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:57,384 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:57,386 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 163 transitions. [2022-11-21 16:34:57,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 166 flow [2022-11-21 16:34:57,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 158 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 16:34:57,394 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-11-21 16:34:57,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-11-21 16:34:57,407 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-11-21 16:34:57,408 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-11-21 16:34:57,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.0) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:57,409 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:34:57,409 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] [2022-11-21 16:34:57,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:34:57,410 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:34:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:57,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1997320056, now seen corresponding path program 1 times [2022-11-21 16:34:57,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:57,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298460786] [2022-11-21 16:34:57,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:57,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:58,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:58,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298460786] [2022-11-21 16:34:58,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298460786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:58,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:34:58,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:34:58,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330672272] [2022-11-21 16:34:58,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:58,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:34:58,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:34:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:34:58,059 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-11-21 16:34:58,061 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,061 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:34:58,061 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-11-21 16:34:58,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:34:58,228 INFO L130 PetriNetUnfolder]: 8/111 cut-off events. [2022-11-21 16:34:58,229 INFO L131 PetriNetUnfolder]: For 6/7 co-relation queries the response was YES. [2022-11-21 16:34:58,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 111 events. 8/111 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 184 event pairs, 1 based on Foata normal form. 4/107 useless extension candidates. Maximal degree in co-relation 144. Up to 19 conditions per place. [2022-11-21 16:34:58,230 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 15 selfloop transitions, 2 changer transitions 5/77 dead transitions. [2022-11-21 16:34:58,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 77 transitions, 205 flow [2022-11-21 16:34:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:34:58,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:34:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2022-11-21 16:34:58,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8022988505747126 [2022-11-21 16:34:58,234 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 349 transitions. [2022-11-21 16:34:58,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 349 transitions. [2022-11-21 16:34:58,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:34:58,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 349 transitions. [2022-11-21 16:34:58,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 69.8) internal successors, (349), 5 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,240 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 87.0) internal successors, (522), 6 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,240 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 5 states and 349 transitions. [2022-11-21 16:34:58,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 77 transitions, 205 flow [2022-11-21 16:34:58,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 205 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:34:58,243 INFO L231 Difference]: Finished difference. Result has 79 places, 71 transitions, 162 flow [2022-11-21 16:34:58,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=79, PETRI_TRANSITIONS=71} [2022-11-21 16:34:58,244 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 2 predicate places. [2022-11-21 16:34:58,245 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 71 transitions, 162 flow [2022-11-21 16:34:58,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:34:58,246 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:58,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:34:58,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:34:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1767965212, now seen corresponding path program 1 times [2022-11-21 16:34:58,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:58,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830605587] [2022-11-21 16:34:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:58,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:58,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:58,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830605587] [2022-11-21 16:34:58,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830605587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:34:58,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:34:58,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:34:58,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261398978] [2022-11-21 16:34:58,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:58,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:34:58,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:58,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:34:58,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:34:58,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-11-21 16:34:58,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 71 transitions, 162 flow. Second operand has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:34:58,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-11-21 16:34:58,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:34:58,743 INFO L130 PetriNetUnfolder]: 76/289 cut-off events. [2022-11-21 16:34:58,744 INFO L131 PetriNetUnfolder]: For 21/21 co-relation queries the response was YES. [2022-11-21 16:34:58,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 289 events. 76/289 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1273 event pairs, 32 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 496. Up to 89 conditions per place. [2022-11-21 16:34:58,753 INFO L137 encePairwiseOnDemand]: 80/87 looper letters, 28 selfloop transitions, 5 changer transitions 4/91 dead transitions. [2022-11-21 16:34:58,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 91 transitions, 283 flow [2022-11-21 16:34:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:34:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:34:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-11-21 16:34:58,763 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8218390804597702 [2022-11-21 16:34:58,764 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-11-21 16:34:58,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-11-21 16:34:58,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:34:58,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-11-21 16:34:58,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,779 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,779 INFO L175 Difference]: Start difference. First operand has 79 places, 71 transitions, 162 flow. Second operand 6 states and 429 transitions. [2022-11-21 16:34:58,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 91 transitions, 283 flow [2022-11-21 16:34:58,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 277 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-21 16:34:58,786 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 184 flow [2022-11-21 16:34:58,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2022-11-21 16:34:58,787 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2022-11-21 16:34:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 184 flow [2022-11-21 16:34:58,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:58,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:34:58,788 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:58,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:34:58,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:34:58,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:34:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash 929170576, now seen corresponding path program 2 times [2022-11-21 16:34:58,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:34:58,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981951877] [2022-11-21 16:34:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:34:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:34:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:34:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:34:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981951877] [2022-11-21 16:34:59,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981951877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:34:59,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470971946] [2022-11-21 16:34:59,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:34:59,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:34:59,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:34:59,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:34:59,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:34:59,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:34:59,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:34:59,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:34:59,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:34:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:59,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:34:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:34:59,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470971946] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 16:34:59,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 16:34:59,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2022-11-21 16:34:59,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217373182] [2022-11-21 16:34:59,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:34:59,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:34:59,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:34:59,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:34:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-21 16:34:59,630 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 87 [2022-11-21 16:34:59,631 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:59,631 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:34:59,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 87 [2022-11-21 16:34:59,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:34:59,763 INFO L130 PetriNetUnfolder]: 53/239 cut-off events. [2022-11-21 16:34:59,764 INFO L131 PetriNetUnfolder]: For 109/113 co-relation queries the response was YES. [2022-11-21 16:34:59,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 239 events. 53/239 cut-off events. For 109/113 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1009 event pairs, 16 based on Foata normal form. 4/236 useless extension candidates. Maximal degree in co-relation 457. Up to 59 conditions per place. [2022-11-21 16:34:59,768 INFO L137 encePairwiseOnDemand]: 82/87 looper letters, 18 selfloop transitions, 6 changer transitions 4/85 dead transitions. [2022-11-21 16:34:59,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 283 flow [2022-11-21 16:34:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:34:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 16:34:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2022-11-21 16:34:59,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8591954022988506 [2022-11-21 16:34:59,780 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2022-11-21 16:34:59,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2022-11-21 16:34:59,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:34:59,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2022-11-21 16:34:59,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:59,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:59,785 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 87.0) internal successors, (435), 5 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:59,785 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 184 flow. Second operand 4 states and 299 transitions. [2022-11-21 16:34:59,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 283 flow [2022-11-21 16:34:59,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 85 transitions, 270 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-21 16:34:59,793 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 220 flow [2022-11-21 16:34:59,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2022-11-21 16:34:59,796 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 7 predicate places. [2022-11-21 16:34:59,796 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 220 flow [2022-11-21 16:34:59,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.5) internal successors, (282), 4 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:34:59,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:34:59,797 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:34:59,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:00,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:00,004 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:00,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:00,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1285977232, now seen corresponding path program 3 times [2022-11-21 16:35:00,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:00,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212353261] [2022-11-21 16:35:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:00,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:00,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:00,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212353261] [2022-11-21 16:35:00,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212353261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235307886] [2022-11-21 16:35:00,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:35:00,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:00,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:00,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:00,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:35:00,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 16:35:00,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:00,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:35:00,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:00,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:00,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235307886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:00,683 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:00,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-21 16:35:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249414086] [2022-11-21 16:35:00,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:00,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:35:00,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:35:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:35:00,686 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 87 [2022-11-21 16:35:00,688 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 220 flow. Second operand has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:00,688 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:00,688 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 87 [2022-11-21 16:35:00,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:00,959 INFO L130 PetriNetUnfolder]: 98/349 cut-off events. [2022-11-21 16:35:00,960 INFO L131 PetriNetUnfolder]: For 295/295 co-relation queries the response was YES. [2022-11-21 16:35:00,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 349 events. 98/349 cut-off events. For 295/295 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1614 event pairs, 21 based on Foata normal form. 9/353 useless extension candidates. Maximal degree in co-relation 803. Up to 67 conditions per place. [2022-11-21 16:35:00,965 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 40 selfloop transitions, 17 changer transitions 7/118 dead transitions. [2022-11-21 16:35:00,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 118 transitions, 508 flow [2022-11-21 16:35:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:35:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 16:35:00,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 582 transitions. [2022-11-21 16:35:00,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8362068965517241 [2022-11-21 16:35:00,968 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 582 transitions. [2022-11-21 16:35:00,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 582 transitions. [2022-11-21 16:35:00,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:00,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 582 transitions. [2022-11-21 16:35:00,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 72.75) internal successors, (582), 8 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:00,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:00,976 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:00,976 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 220 flow. Second operand 8 states and 582 transitions. [2022-11-21 16:35:00,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 118 transitions, 508 flow [2022-11-21 16:35:00,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 118 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:35:00,981 INFO L231 Difference]: Finished difference. Result has 95 places, 88 transitions, 350 flow [2022-11-21 16:35:00,982 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=350, PETRI_PLACES=95, PETRI_TRANSITIONS=88} [2022-11-21 16:35:00,983 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 18 predicate places. [2022-11-21 16:35:00,983 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 88 transitions, 350 flow [2022-11-21 16:35:00,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 67.55555555555556) internal successors, (608), 9 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:00,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:00,984 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] [2022-11-21 16:35:00,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 16:35:01,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:01,190 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1621783018, now seen corresponding path program 1 times [2022-11-21 16:35:01,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:01,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642037965] [2022-11-21 16:35:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:01,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:01,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:01,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642037965] [2022-11-21 16:35:01,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642037965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:01,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305194588] [2022-11-21 16:35:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:01,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:01,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:01,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:01,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:35:01,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:35:01,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:01,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:01,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305194588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:01,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:01,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-11-21 16:35:01,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693883393] [2022-11-21 16:35:01,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:01,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 16:35:01,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 16:35:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-21 16:35:02,000 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 87 [2022-11-21 16:35:02,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 88 transitions, 350 flow. Second operand has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:02,002 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:02,002 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 87 [2022-11-21 16:35:02,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:02,263 INFO L130 PetriNetUnfolder]: 77/429 cut-off events. [2022-11-21 16:35:02,263 INFO L131 PetriNetUnfolder]: For 628/647 co-relation queries the response was YES. [2022-11-21 16:35:02,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 429 events. 77/429 cut-off events. For 628/647 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2258 event pairs, 13 based on Foata normal form. 14/431 useless extension candidates. Maximal degree in co-relation 1065. Up to 73 conditions per place. [2022-11-21 16:35:02,268 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 44 selfloop transitions, 10 changer transitions 9/120 dead transitions. [2022-11-21 16:35:02,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 608 flow [2022-11-21 16:35:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:35:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 16:35:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 517 transitions. [2022-11-21 16:35:02,271 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.742816091954023 [2022-11-21 16:35:02,272 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 517 transitions. [2022-11-21 16:35:02,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 517 transitions. [2022-11-21 16:35:02,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:02,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 517 transitions. [2022-11-21 16:35:02,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 64.625) internal successors, (517), 8 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:02,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:02,277 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:02,277 INFO L175 Difference]: Start difference. First operand has 95 places, 88 transitions, 350 flow. Second operand 8 states and 517 transitions. [2022-11-21 16:35:02,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 608 flow [2022-11-21 16:35:02,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 120 transitions, 561 flow, removed 17 selfloop flow, removed 3 redundant places. [2022-11-21 16:35:02,284 INFO L231 Difference]: Finished difference. Result has 102 places, 91 transitions, 371 flow [2022-11-21 16:35:02,285 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=371, PETRI_PLACES=102, PETRI_TRANSITIONS=91} [2022-11-21 16:35:02,286 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 25 predicate places. [2022-11-21 16:35:02,286 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 91 transitions, 371 flow [2022-11-21 16:35:02,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 62.4) internal successors, (624), 10 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:02,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:02,287 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:02,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:02,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:02,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:02,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:02,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1614141052, now seen corresponding path program 2 times [2022-11-21 16:35:02,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:02,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010665822] [2022-11-21 16:35:02,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:02,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:02,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:02,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010665822] [2022-11-21 16:35:02,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010665822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:02,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797792780] [2022-11-21 16:35:02,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:35:02,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:02,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:02,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:02,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:35:02,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:35:02,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:02,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:35:02,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:03,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:03,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797792780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:03,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:03,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-21 16:35:03,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661622709] [2022-11-21 16:35:03,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:03,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:35:03,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:03,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:35:03,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:35:03,346 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:35:03,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 91 transitions, 371 flow. Second operand has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:03,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:03,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:35:03,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:05,422 INFO L130 PetriNetUnfolder]: 438/1183 cut-off events. [2022-11-21 16:35:05,423 INFO L131 PetriNetUnfolder]: For 1752/1776 co-relation queries the response was YES. [2022-11-21 16:35:05,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3509 conditions, 1183 events. 438/1183 cut-off events. For 1752/1776 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7396 event pairs, 23 based on Foata normal form. 21/1196 useless extension candidates. Maximal degree in co-relation 3493. Up to 139 conditions per place. [2022-11-21 16:35:05,438 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 125 selfloop transitions, 134 changer transitions 9/322 dead transitions. [2022-11-21 16:35:05,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 322 transitions, 2215 flow [2022-11-21 16:35:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-21 16:35:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-21 16:35:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3177 transitions. [2022-11-21 16:35:05,452 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.776962582538518 [2022-11-21 16:35:05,453 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3177 transitions. [2022-11-21 16:35:05,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3177 transitions. [2022-11-21 16:35:05,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:05,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3177 transitions. [2022-11-21 16:35:05,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 67.59574468085107) internal successors, (3177), 47 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:05,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:05,486 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 87.0) internal successors, (4176), 48 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:05,487 INFO L175 Difference]: Start difference. First operand has 102 places, 91 transitions, 371 flow. Second operand 47 states and 3177 transitions. [2022-11-21 16:35:05,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 322 transitions, 2215 flow [2022-11-21 16:35:05,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 322 transitions, 2173 flow, removed 19 selfloop flow, removed 4 redundant places. [2022-11-21 16:35:05,503 INFO L231 Difference]: Finished difference. Result has 165 places, 221 transitions, 1625 flow [2022-11-21 16:35:05,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1625, PETRI_PLACES=165, PETRI_TRANSITIONS=221} [2022-11-21 16:35:05,505 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 88 predicate places. [2022-11-21 16:35:05,505 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 221 transitions, 1625 flow [2022-11-21 16:35:05,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:05,506 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:05,506 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:05,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-21 16:35:05,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:05,720 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:05,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1524011940, now seen corresponding path program 3 times [2022-11-21 16:35:05,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:05,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432025575] [2022-11-21 16:35:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:05,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:06,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432025575] [2022-11-21 16:35:06,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432025575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:06,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726348738] [2022-11-21 16:35:06,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:35:06,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:06,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:06,209 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:06,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:35:06,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 16:35:06,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:06,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:35:06,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:06,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:06,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726348738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:06,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:06,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-21 16:35:06,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305351136] [2022-11-21 16:35:06,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:06,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 16:35:06,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:06,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 16:35:06,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-21 16:35:06,766 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:35:06,769 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 221 transitions, 1625 flow. Second operand has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:06,769 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:06,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:35:06,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:07,920 INFO L130 PetriNetUnfolder]: 514/1456 cut-off events. [2022-11-21 16:35:07,921 INFO L131 PetriNetUnfolder]: For 6487/6504 co-relation queries the response was YES. [2022-11-21 16:35:07,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6053 conditions, 1456 events. 514/1456 cut-off events. For 6487/6504 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 9887 event pairs, 49 based on Foata normal form. 13/1458 useless extension candidates. Maximal degree in co-relation 6015. Up to 278 conditions per place. [2022-11-21 16:35:07,937 INFO L137 encePairwiseOnDemand]: 73/87 looper letters, 191 selfloop transitions, 97 changer transitions 22/364 dead transitions. [2022-11-21 16:35:07,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 364 transitions, 3487 flow [2022-11-21 16:35:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:35:07,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-21 16:35:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1494 transitions. [2022-11-21 16:35:07,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.780564263322884 [2022-11-21 16:35:07,943 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1494 transitions. [2022-11-21 16:35:07,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1494 transitions. [2022-11-21 16:35:07,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:07,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1494 transitions. [2022-11-21 16:35:07,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 67.9090909090909) internal successors, (1494), 22 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:07,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 87.0) internal successors, (2001), 23 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:07,955 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 87.0) internal successors, (2001), 23 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:07,955 INFO L175 Difference]: Start difference. First operand has 165 places, 221 transitions, 1625 flow. Second operand 22 states and 1494 transitions. [2022-11-21 16:35:07,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 364 transitions, 3487 flow [2022-11-21 16:35:07,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 364 transitions, 3267 flow, removed 54 selfloop flow, removed 3 redundant places. [2022-11-21 16:35:08,003 INFO L231 Difference]: Finished difference. Result has 195 places, 264 transitions, 2159 flow [2022-11-21 16:35:08,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2159, PETRI_PLACES=195, PETRI_TRANSITIONS=264} [2022-11-21 16:35:08,005 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 118 predicate places. [2022-11-21 16:35:08,005 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 264 transitions, 2159 flow [2022-11-21 16:35:08,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:08,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:08,006 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:08,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:08,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:08,213 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash -941164102, now seen corresponding path program 4 times [2022-11-21 16:35:08,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:08,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209869475] [2022-11-21 16:35:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:08,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:08,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:08,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209869475] [2022-11-21 16:35:08,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209869475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:08,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058355576] [2022-11-21 16:35:08,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:35:08,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:08,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:08,553 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:08,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:35:08,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:35:08,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:08,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:35:08,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:08,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:09,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058355576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:09,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:09,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-21 16:35:09,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481494242] [2022-11-21 16:35:09,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:09,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:35:09,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:09,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:35:09,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:35:09,014 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:35:09,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 264 transitions, 2159 flow. Second operand has 20 states, 20 states have (on average 65.65) internal successors, (1313), 20 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:09,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:09,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:35:09,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:14,156 INFO L130 PetriNetUnfolder]: 1012/2888 cut-off events. [2022-11-21 16:35:14,157 INFO L131 PetriNetUnfolder]: For 17866/17877 co-relation queries the response was YES. [2022-11-21 16:35:14,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12357 conditions, 2888 events. 1012/2888 cut-off events. For 17866/17877 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 24065 event pairs, 16 based on Foata normal form. 30/2906 useless extension candidates. Maximal degree in co-relation 12306. Up to 294 conditions per place. [2022-11-21 16:35:14,189 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 218 selfloop transitions, 442 changer transitions 39/753 dead transitions. [2022-11-21 16:35:14,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 753 transitions, 8023 flow [2022-11-21 16:35:14,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-21 16:35:14,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2022-11-21 16:35:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 7571 transitions. [2022-11-21 16:35:14,284 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7701149425287356 [2022-11-21 16:35:14,284 INFO L72 ComplementDD]: Start complementDD. Operand 113 states and 7571 transitions. [2022-11-21 16:35:14,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 7571 transitions. [2022-11-21 16:35:14,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:14,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 113 states and 7571 transitions. [2022-11-21 16:35:14,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 114 states, 113 states have (on average 67.0) internal successors, (7571), 113 states have internal predecessors, (7571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:14,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 114 states, 114 states have (on average 87.0) internal successors, (9918), 114 states have internal predecessors, (9918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:14,328 INFO L81 ComplementDD]: Finished complementDD. Result has 114 states, 114 states have (on average 87.0) internal successors, (9918), 114 states have internal predecessors, (9918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:14,329 INFO L175 Difference]: Start difference. First operand has 195 places, 264 transitions, 2159 flow. Second operand 113 states and 7571 transitions. [2022-11-21 16:35:14,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 753 transitions, 8023 flow [2022-11-21 16:35:14,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 753 transitions, 7798 flow, removed 105 selfloop flow, removed 5 redundant places. [2022-11-21 16:35:14,428 INFO L231 Difference]: Finished difference. Result has 339 places, 557 transitions, 6207 flow [2022-11-21 16:35:14,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=113, PETRI_FLOW=6207, PETRI_PLACES=339, PETRI_TRANSITIONS=557} [2022-11-21 16:35:14,431 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 262 predicate places. [2022-11-21 16:35:14,431 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 557 transitions, 6207 flow [2022-11-21 16:35:14,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.65) internal successors, (1313), 20 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:14,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:14,432 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:14,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 16:35:14,643 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:14,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash -768640732, now seen corresponding path program 5 times [2022-11-21 16:35:14,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:14,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078352416] [2022-11-21 16:35:14,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:14,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:14,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078352416] [2022-11-21 16:35:14,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078352416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:14,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519901400] [2022-11-21 16:35:14,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:35:14,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:14,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:14,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:14,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:35:15,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:35:15,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:15,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:35:15,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:15,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:15,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519901400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:15,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:15,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2022-11-21 16:35:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611884297] [2022-11-21 16:35:15,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:15,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 16:35:15,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 16:35:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-11-21 16:35:15,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:35:15,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 557 transitions, 6207 flow. Second operand has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:15,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:15,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:35:15,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:20,873 INFO L130 PetriNetUnfolder]: 1690/5060 cut-off events. [2022-11-21 16:35:20,874 INFO L131 PetriNetUnfolder]: For 100098/100112 co-relation queries the response was YES. [2022-11-21 16:35:20,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29152 conditions, 5060 events. 1690/5060 cut-off events. For 100098/100112 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 49411 event pairs, 118 based on Foata normal form. 34/5034 useless extension candidates. Maximal degree in co-relation 29062. Up to 528 conditions per place. [2022-11-21 16:35:20,943 INFO L137 encePairwiseOnDemand]: 72/87 looper letters, 263 selfloop transitions, 789 changer transitions 18/1124 dead transitions. [2022-11-21 16:35:20,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1124 transitions, 15310 flow [2022-11-21 16:35:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-21 16:35:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-21 16:35:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4173 transitions. [2022-11-21 16:35:20,951 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7736373748609566 [2022-11-21 16:35:20,951 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4173 transitions. [2022-11-21 16:35:20,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4173 transitions. [2022-11-21 16:35:20,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:20,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4173 transitions. [2022-11-21 16:35:20,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 67.30645161290323) internal successors, (4173), 62 states have internal predecessors, (4173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:20,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:20,972 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 87.0) internal successors, (5481), 63 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:20,972 INFO L175 Difference]: Start difference. First operand has 339 places, 557 transitions, 6207 flow. Second operand 62 states and 4173 transitions. [2022-11-21 16:35:20,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1124 transitions, 15310 flow [2022-11-21 16:35:21,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1124 transitions, 13695 flow, removed 754 selfloop flow, removed 7 redundant places. [2022-11-21 16:35:21,540 INFO L231 Difference]: Finished difference. Result has 404 places, 973 transitions, 12639 flow [2022-11-21 16:35:21,541 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=12639, PETRI_PLACES=404, PETRI_TRANSITIONS=973} [2022-11-21 16:35:21,541 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 327 predicate places. [2022-11-21 16:35:21,541 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 973 transitions, 12639 flow [2022-11-21 16:35:21,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 65.13636363636364) internal successors, (1433), 22 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:21,543 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:21,543 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:21,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:21,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:21,760 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash 894328634, now seen corresponding path program 6 times [2022-11-21 16:35:21,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:21,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983589787] [2022-11-21 16:35:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:21,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:22,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:22,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983589787] [2022-11-21 16:35:22,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983589787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:22,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63005287] [2022-11-21 16:35:22,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:35:22,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:22,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:22,071 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:22,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:35:22,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 16:35:22,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:22,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:35:22,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:22,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:22,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63005287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:22,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:22,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-21 16:35:22,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939274330] [2022-11-21 16:35:22,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:22,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:35:22,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:35:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:35:22,607 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:35:22,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 973 transitions, 12639 flow. Second operand has 19 states, 19 states have (on average 65.94736842105263) internal successors, (1253), 19 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:22,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:22,609 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:35:22,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:28,283 INFO L130 PetriNetUnfolder]: 2237/6436 cut-off events. [2022-11-21 16:35:28,283 INFO L131 PetriNetUnfolder]: For 117830/117848 co-relation queries the response was YES. [2022-11-21 16:35:28,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38470 conditions, 6436 events. 2237/6436 cut-off events. For 117830/117848 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 65279 event pairs, 84 based on Foata normal form. 38/6439 useless extension candidates. Maximal degree in co-relation 38368. Up to 705 conditions per place. [2022-11-21 16:35:28,373 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 264 selfloop transitions, 1174 changer transitions 16/1508 dead transitions. [2022-11-21 16:35:28,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 1508 transitions, 22538 flow [2022-11-21 16:35:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-21 16:35:28,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2022-11-21 16:35:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 5274 transitions. [2022-11-21 16:35:28,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7673505019642077 [2022-11-21 16:35:28,383 INFO L72 ComplementDD]: Start complementDD. Operand 79 states and 5274 transitions. [2022-11-21 16:35:28,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 5274 transitions. [2022-11-21 16:35:28,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:28,385 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 79 states and 5274 transitions. [2022-11-21 16:35:28,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 80 states, 79 states have (on average 66.75949367088607) internal successors, (5274), 79 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:28,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:28,408 INFO L81 ComplementDD]: Finished complementDD. Result has 80 states, 80 states have (on average 87.0) internal successors, (6960), 80 states have internal predecessors, (6960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:28,409 INFO L175 Difference]: Start difference. First operand has 404 places, 973 transitions, 12639 flow. Second operand 79 states and 5274 transitions. [2022-11-21 16:35:28,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 1508 transitions, 22538 flow [2022-11-21 16:35:29,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 1508 transitions, 21518 flow, removed 441 selfloop flow, removed 11 redundant places. [2022-11-21 16:35:29,799 INFO L231 Difference]: Finished difference. Result has 504 places, 1405 transitions, 21611 flow [2022-11-21 16:35:29,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=11956, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=747, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=79, PETRI_FLOW=21611, PETRI_PLACES=504, PETRI_TRANSITIONS=1405} [2022-11-21 16:35:29,801 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 427 predicate places. [2022-11-21 16:35:29,802 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 1405 transitions, 21611 flow [2022-11-21 16:35:29,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.94736842105263) internal successors, (1253), 19 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:29,803 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:29,803 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:29,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:30,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:30,011 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:30,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash -889065066, now seen corresponding path program 7 times [2022-11-21 16:35:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934887987] [2022-11-21 16:35:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:30,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:30,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:30,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934887987] [2022-11-21 16:35:30,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934887987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:30,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527393687] [2022-11-21 16:35:30,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 16:35:30,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:30,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:30,399 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:30,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:35:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:30,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:35:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:30,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:30,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527393687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:30,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:30,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-21 16:35:30,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620356439] [2022-11-21 16:35:30,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:30,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:35:30,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:35:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:35:30,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:35:30,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 1405 transitions, 21611 flow. Second operand has 19 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:30,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:30,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:35:30,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:36,443 INFO L130 PetriNetUnfolder]: 2355/6884 cut-off events. [2022-11-21 16:35:36,443 INFO L131 PetriNetUnfolder]: For 113642/113662 co-relation queries the response was YES. [2022-11-21 16:35:36,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43543 conditions, 6884 events. 2355/6884 cut-off events. For 113642/113662 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 71402 event pairs, 109 based on Foata normal form. 17/6816 useless extension candidates. Maximal degree in co-relation 43413. Up to 840 conditions per place. [2022-11-21 16:35:36,544 INFO L137 encePairwiseOnDemand]: 73/87 looper letters, 477 selfloop transitions, 1125 changer transitions 41/1697 dead transitions. [2022-11-21 16:35:36,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 1697 transitions, 29281 flow [2022-11-21 16:35:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-21 16:35:36,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-21 16:35:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4643 transitions. [2022-11-21 16:35:36,557 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7734466100283192 [2022-11-21 16:35:36,557 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4643 transitions. [2022-11-21 16:35:36,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4643 transitions. [2022-11-21 16:35:36,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:36,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4643 transitions. [2022-11-21 16:35:36,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 67.28985507246377) internal successors, (4643), 69 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:36,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 87.0) internal successors, (6090), 70 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:36,590 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 87.0) internal successors, (6090), 70 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:36,590 INFO L175 Difference]: Start difference. First operand has 504 places, 1405 transitions, 21611 flow. Second operand 69 states and 4643 transitions. [2022-11-21 16:35:36,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 1697 transitions, 29281 flow [2022-11-21 16:35:38,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1697 transitions, 28971 flow, removed 80 selfloop flow, removed 15 redundant places. [2022-11-21 16:35:38,093 INFO L231 Difference]: Finished difference. Result has 572 places, 1540 transitions, 26980 flow [2022-11-21 16:35:38,094 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=21148, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=975, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=26980, PETRI_PLACES=572, PETRI_TRANSITIONS=1540} [2022-11-21 16:35:38,094 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 495 predicate places. [2022-11-21 16:35:38,095 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1540 transitions, 26980 flow [2022-11-21 16:35:38,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.3157894736842) internal successors, (1241), 19 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:38,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:38,096 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:38,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-21 16:35:38,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:38,297 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:38,297 INFO L85 PathProgramCache]: Analyzing trace with hash -522049182, now seen corresponding path program 8 times [2022-11-21 16:35:38,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:38,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752323619] [2022-11-21 16:35:38,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:38,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:38,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:38,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752323619] [2022-11-21 16:35:38,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752323619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:38,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236834204] [2022-11-21 16:35:38,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:35:38,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:38,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:38,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:38,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:35:38,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:35:38,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:38,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:35:38,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:38,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:39,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236834204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:39,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:39,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-11-21 16:35:39,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837838012] [2022-11-21 16:35:39,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:39,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 16:35:39,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 16:35:39,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-11-21 16:35:39,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:35:39,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1540 transitions, 26980 flow. Second operand has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:39,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:39,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:35:39,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:35:47,830 INFO L130 PetriNetUnfolder]: 3422/9442 cut-off events. [2022-11-21 16:35:47,831 INFO L131 PetriNetUnfolder]: For 211925/211950 co-relation queries the response was YES. [2022-11-21 16:35:48,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69848 conditions, 9442 events. 3422/9442 cut-off events. For 211925/211950 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 99917 event pairs, 358 based on Foata normal form. 42/9368 useless extension candidates. Maximal degree in co-relation 69705. Up to 1497 conditions per place. [2022-11-21 16:35:48,253 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 811 selfloop transitions, 1554 changer transitions 0/2419 dead transitions. [2022-11-21 16:35:48,253 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 2419 transitions, 46845 flow [2022-11-21 16:35:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-21 16:35:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-11-21 16:35:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4991 transitions. [2022-11-21 16:35:48,265 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7752407579993786 [2022-11-21 16:35:48,265 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4991 transitions. [2022-11-21 16:35:48,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4991 transitions. [2022-11-21 16:35:48,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:35:48,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4991 transitions. [2022-11-21 16:35:48,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 67.44594594594595) internal successors, (4991), 74 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:48,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:48,291 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 87.0) internal successors, (6525), 75 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:48,291 INFO L175 Difference]: Start difference. First operand has 572 places, 1540 transitions, 26980 flow. Second operand 74 states and 4991 transitions. [2022-11-21 16:35:48,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 2419 transitions, 46845 flow [2022-11-21 16:35:51,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 611 places, 2419 transitions, 45577 flow, removed 226 selfloop flow, removed 29 redundant places. [2022-11-21 16:35:51,399 INFO L231 Difference]: Finished difference. Result has 638 places, 2188 transitions, 43491 flow [2022-11-21 16:35:51,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=26180, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=956, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=43491, PETRI_PLACES=638, PETRI_TRANSITIONS=2188} [2022-11-21 16:35:51,401 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 561 predicate places. [2022-11-21 16:35:51,401 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 2188 transitions, 43491 flow [2022-11-21 16:35:51,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 65.7) internal successors, (1314), 20 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:51,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:35:51,402 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:35:51,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:35:51,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:51,602 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:35:51,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:35:51,603 INFO L85 PathProgramCache]: Analyzing trace with hash 729574440, now seen corresponding path program 9 times [2022-11-21 16:35:51,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:35:51,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713618252] [2022-11-21 16:35:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:35:51,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:35:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:35:51,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:51,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:35:51,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713618252] [2022-11-21 16:35:51,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713618252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:35:51,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569275551] [2022-11-21 16:35:51,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:35:51,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:35:51,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:35:51,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:35:51,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:35:51,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 16:35:51,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:35:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:35:51,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:35:52,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:52,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:35:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:35:52,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569275551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:35:52,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:35:52,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-21 16:35:52,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721886904] [2022-11-21 16:35:52,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:35:52,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:35:52,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:35:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:35:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:35:52,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:35:52,305 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 2188 transitions, 43491 flow. Second operand has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:35:52,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:35:52,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:35:52,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:36:06,290 INFO L130 PetriNetUnfolder]: 4688/12581 cut-off events. [2022-11-21 16:36:06,290 INFO L131 PetriNetUnfolder]: For 406550/406582 co-relation queries the response was YES. [2022-11-21 16:36:06,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105516 conditions, 12581 events. 4688/12581 cut-off events. For 406550/406582 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 136935 event pairs, 331 based on Foata normal form. 40/12480 useless extension candidates. Maximal degree in co-relation 105348. Up to 1572 conditions per place. [2022-11-21 16:36:06,728 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 656 selfloop transitions, 2405 changer transitions 4/3119 dead transitions. [2022-11-21 16:36:06,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 3119 transitions, 68517 flow [2022-11-21 16:36:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-21 16:36:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-21 16:36:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5585 transitions. [2022-11-21 16:36:06,736 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7734385819138624 [2022-11-21 16:36:06,736 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5585 transitions. [2022-11-21 16:36:06,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5585 transitions. [2022-11-21 16:36:06,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:36:06,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5585 transitions. [2022-11-21 16:36:06,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 67.28915662650603) internal successors, (5585), 83 states have internal predecessors, (5585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:06,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:06,762 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 87.0) internal successors, (7308), 84 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:06,762 INFO L175 Difference]: Start difference. First operand has 638 places, 2188 transitions, 43491 flow. Second operand 83 states and 5585 transitions. [2022-11-21 16:36:06,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 3119 transitions, 68517 flow [2022-11-21 16:36:14,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 713 places, 3119 transitions, 67811 flow, removed 290 selfloop flow, removed 7 redundant places. [2022-11-21 16:36:14,569 INFO L231 Difference]: Finished difference. Result has 738 places, 2892 transitions, 66112 flow [2022-11-21 16:36:14,572 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=43078, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1714, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=66112, PETRI_PLACES=738, PETRI_TRANSITIONS=2892} [2022-11-21 16:36:14,573 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 661 predicate places. [2022-11-21 16:36:14,573 INFO L495 AbstractCegarLoop]: Abstraction has has 738 places, 2892 transitions, 66112 flow [2022-11-21 16:36:14,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.73684210526316) internal successors, (1249), 19 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:14,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:36:14,574 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:36:14,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-21 16:36:14,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:36:14,780 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:36:14,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:36:14,781 INFO L85 PathProgramCache]: Analyzing trace with hash -997640146, now seen corresponding path program 10 times [2022-11-21 16:36:14,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:36:14,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015854226] [2022-11-21 16:36:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:36:14,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:36:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:36:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:36:15,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:36:15,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015854226] [2022-11-21 16:36:15,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015854226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:36:15,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353877510] [2022-11-21 16:36:15,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 16:36:15,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:36:15,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:36:15,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:36:15,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:36:15,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 16:36:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:36:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:36:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:36:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:36:15,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:36:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:36:15,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353877510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:36:15,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:36:15,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-21 16:36:15,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024403790] [2022-11-21 16:36:15,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:36:15,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 16:36:15,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:36:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 16:36:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-11-21 16:36:15,596 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:36:15,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 738 places, 2892 transitions, 66112 flow. Second operand has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:15,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:36:15,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:36:15,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:36:40,526 INFO L130 PetriNetUnfolder]: 6374/17199 cut-off events. [2022-11-21 16:36:40,526 INFO L131 PetriNetUnfolder]: For 698681/698731 co-relation queries the response was YES. [2022-11-21 16:36:40,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156909 conditions, 17199 events. 6374/17199 cut-off events. For 698681/698731 co-relation queries the response was YES. Maximal size of possible extension queue 1216. Compared 197336 event pairs, 418 based on Foata normal form. 55/17086 useless extension candidates. Maximal degree in co-relation 156717. Up to 2081 conditions per place. [2022-11-21 16:36:41,082 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 698 selfloop transitions, 3558 changer transitions 2/4312 dead transitions. [2022-11-21 16:36:41,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 867 places, 4312 transitions, 106891 flow [2022-11-21 16:36:41,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-11-21 16:36:41,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2022-11-21 16:36:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 8664 transitions. [2022-11-21 16:36:41,100 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7660477453580902 [2022-11-21 16:36:41,101 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 8664 transitions. [2022-11-21 16:36:41,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 8664 transitions. [2022-11-21 16:36:41,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:36:41,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 8664 transitions. [2022-11-21 16:36:41,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 66.64615384615385) internal successors, (8664), 130 states have internal predecessors, (8664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:41,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:41,146 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 87.0) internal successors, (11397), 131 states have internal predecessors, (11397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:41,147 INFO L175 Difference]: Start difference. First operand has 738 places, 2892 transitions, 66112 flow. Second operand 130 states and 8664 transitions. [2022-11-21 16:36:41,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 867 places, 4312 transitions, 106891 flow [2022-11-21 16:36:59,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 4312 transitions, 106177 flow, removed 295 selfloop flow, removed 15 redundant places. [2022-11-21 16:36:59,908 INFO L231 Difference]: Finished difference. Result has 893 places, 4079 transitions, 105538 flow [2022-11-21 16:36:59,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=65534, PETRI_DIFFERENCE_MINUEND_PLACES=723, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=105538, PETRI_PLACES=893, PETRI_TRANSITIONS=4079} [2022-11-21 16:36:59,911 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 816 predicate places. [2022-11-21 16:36:59,911 INFO L495 AbstractCegarLoop]: Abstraction has has 893 places, 4079 transitions, 105538 flow [2022-11-21 16:36:59,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 65.78947368421052) internal successors, (1250), 19 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:36:59,912 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:36:59,912 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:36:59,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:37:00,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 16:37:00,125 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:37:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:00,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1040374314, now seen corresponding path program 11 times [2022-11-21 16:37:00,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:00,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773044814] [2022-11-21 16:37:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:00,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:00,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:00,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773044814] [2022-11-21 16:37:00,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773044814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:37:00,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812909900] [2022-11-21 16:37:00,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:37:00,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:37:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:37:00,387 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:37:00,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:37:00,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:37:00,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:37:00,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 16:37:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:37:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:00,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:37:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:00,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812909900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:37:00,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:37:00,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-21 16:37:00,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102317774] [2022-11-21 16:37:00,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:37:00,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 16:37:00,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:00,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 16:37:00,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-21 16:37:00,974 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:37:00,975 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 4079 transitions, 105538 flow. Second operand has 21 states, 21 states have (on average 65.19047619047619) internal successors, (1369), 21 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:00,975 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:37:00,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:37:00,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:37:45,927 INFO L130 PetriNetUnfolder]: 8681/23478 cut-off events. [2022-11-21 16:37:45,927 INFO L131 PetriNetUnfolder]: For 1273827/1273865 co-relation queries the response was YES. [2022-11-21 16:37:46,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235371 conditions, 23478 events. 8681/23478 cut-off events. For 1273827/1273865 co-relation queries the response was YES. Maximal size of possible extension queue 1638. Compared 284066 event pairs, 516 based on Foata normal form. 100/23352 useless extension candidates. Maximal degree in co-relation 235138. Up to 2840 conditions per place. [2022-11-21 16:37:47,103 INFO L137 encePairwiseOnDemand]: 72/87 looper letters, 976 selfloop transitions, 4887 changer transitions 3/5920 dead transitions. [2022-11-21 16:37:47,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 952 places, 5920 transitions, 164570 flow [2022-11-21 16:37:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-21 16:37:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-21 16:37:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4063 transitions. [2022-11-21 16:37:47,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7783524904214559 [2022-11-21 16:37:47,110 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4063 transitions. [2022-11-21 16:37:47,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4063 transitions. [2022-11-21 16:37:47,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:37:47,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4063 transitions. [2022-11-21 16:37:47,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 67.71666666666667) internal successors, (4063), 60 states have internal predecessors, (4063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:47,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:47,127 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:47,128 INFO L175 Difference]: Start difference. First operand has 893 places, 4079 transitions, 105538 flow. Second operand 60 states and 4063 transitions. [2022-11-21 16:37:47,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 952 places, 5920 transitions, 164570 flow [2022-11-21 16:38:33,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 926 places, 5920 transitions, 163106 flow, removed 557 selfloop flow, removed 26 redundant places. [2022-11-21 16:38:33,881 INFO L231 Difference]: Finished difference. Result has 947 places, 5693 transitions, 165031 flow [2022-11-21 16:38:33,884 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=104376, PETRI_DIFFERENCE_MINUEND_PLACES=867, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=165031, PETRI_PLACES=947, PETRI_TRANSITIONS=5693} [2022-11-21 16:38:33,884 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 870 predicate places. [2022-11-21 16:38:33,884 INFO L495 AbstractCegarLoop]: Abstraction has has 947 places, 5693 transitions, 165031 flow [2022-11-21 16:38:33,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 65.19047619047619) internal successors, (1369), 21 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:33,885 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:38:33,885 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:38:33,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 16:38:34,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 16:38:34,085 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 16:38:34,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:38:34,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1392268338, now seen corresponding path program 12 times [2022-11-21 16:38:34,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:38:34,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189242990] [2022-11-21 16:38:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:38:34,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:38:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:38:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:38:34,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:38:34,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189242990] [2022-11-21 16:38:34,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189242990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:38:34,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492770077] [2022-11-21 16:38:34,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 16:38:34,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:38:34,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:38:34,375 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:38:34,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61604d11-c2ec-4317-a9da-3dd5f0a245c5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 16:38:34,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-21 16:38:34,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:38:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-21 16:38:34,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:38:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:38:34,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:38:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:38:34,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492770077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:38:34,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:38:34,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 16:38:34,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620029944] [2022-11-21 16:38:34,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:38:34,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:38:34,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:38:34,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:38:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:38:34,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 87 [2022-11-21 16:38:34,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 947 places, 5693 transitions, 165031 flow. Second operand has 18 states, 18 states have (on average 65.94444444444444) internal successors, (1187), 18 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:38:34,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:38:34,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 87 [2022-11-21 16:38:34,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand