./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/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_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/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_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- 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 09:04:11,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:04:11,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:04:11,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:04:11,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:04:11,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:04:11,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:04:11,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:04:11,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:04:11,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:04:11,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:04:11,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:04:11,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:04:11,934 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:04:11,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:04:11,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:04:11,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:04:11,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:04:11,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:04:11,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:04:11,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:04:11,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:04:11,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:04:11,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:04:11,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:04:11,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:04:11,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:04:11,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:04:11,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:04:11,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:04:11,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:04:11,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:04:11,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:04:11,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:04:11,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:04:11,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:04:11,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:04:11,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:04:11,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:04:11,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:04:11,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:04:11,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 09:04:12,023 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:04:12,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:04:12,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:04:12,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:04:12,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:04:12,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:04:12,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:04:12,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:04:12,025 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:04:12,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:04:12,026 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:04:12,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:04:12,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:04:12,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:04:12,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 09:04:12,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:04:12,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 09:04:12,027 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:04:12,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 09:04:12,027 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:04:12,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 09:04:12,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:04:12,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:04:12,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:04:12,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:04:12,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:04:12,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:04:12,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 09:04:12,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:04:12,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 09:04:12,029 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 09:04:12,030 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 09:04:12,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 09:04:12,030 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_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-11-21 09:04:12,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:04:12,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:04:12,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:04:12,404 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:04:12,405 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:04:12,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-21 09:04:15,630 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:04:15,925 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:04:15,931 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-21 09:04:15,951 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/data/792e74333/3182427c82c64d4aace9eb7e6e1cdc19/FLAG88ef099a8 [2022-11-21 09:04:15,970 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/data/792e74333/3182427c82c64d4aace9eb7e6e1cdc19 [2022-11-21 09:04:15,974 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:04:15,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:04:15,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:04:15,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:04:15,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:04:15,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:04:15" (1/1) ... [2022-11-21 09:04:15,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d918735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:15, skipping insertion in model container [2022-11-21 09:04:15,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:04:15" (1/1) ... [2022-11-21 09:04:15,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:04:16,060 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:04:16,536 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_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-21 09:04:16,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:04:16,595 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:04:16,657 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_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-21 09:04:16,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:04:16,723 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:04:16,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16 WrapperNode [2022-11-21 09:04:16,724 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:04:16,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:04:16,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:04:16,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:04:16,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,777 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-11-21 09:04:16,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:04:16,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:04:16,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:04:16,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:04:16,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,811 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,840 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,842 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:04:16,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:04:16,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:04:16,858 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:04:16,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (1/1) ... [2022-11-21 09:04:16,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:04:16,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:16,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:04:16,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:04:16,937 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-21 09:04:16,938 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-21 09:04:16,938 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-21 09:04:16,939 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-21 09:04:16,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 09:04:16,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 09:04:16,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 09:04:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 09:04:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 09:04:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:04:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 09:04:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:04:16,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:04:16,943 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 09:04:17,102 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:04:17,105 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:04:17,436 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:04:17,446 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:04:17,446 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 09:04:17,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:04:17 BoogieIcfgContainer [2022-11-21 09:04:17,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:04:17,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:04:17,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:04:17,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:04:17,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:04:15" (1/3) ... [2022-11-21 09:04:17,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a17b7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:04:17, skipping insertion in model container [2022-11-21 09:04:17,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:04:16" (2/3) ... [2022-11-21 09:04:17,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a17b7b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:04:17, skipping insertion in model container [2022-11-21 09:04:17,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:04:17" (3/3) ... [2022-11-21 09:04:17,458 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-11-21 09:04:17,468 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 09:04:17,479 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:04:17,479 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 09:04:17,479 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 09:04:17,662 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 09:04:17,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2022-11-21 09:04:17,841 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2022-11-21 09:04:17,841 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 09:04:17,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 408 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-21 09:04:17,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2022-11-21 09:04:17,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2022-11-21 09:04:17,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:04:17,873 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;@c3c72e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:04:17,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 09:04:17,913 INFO L130 PetriNetUnfolder]: 5/127 cut-off events. [2022-11-21 09:04:17,914 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 09:04:17,914 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:17,915 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] [2022-11-21 09:04:17,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash -517190214, now seen corresponding path program 1 times [2022-11-21 09:04:17,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:17,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935721562] [2022-11-21 09:04:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:17,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:18,410 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 09:04:18,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:18,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935721562] [2022-11-21 09:04:18,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935721562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:04:18,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:04:18,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:04:18,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611062442] [2022-11-21 09:04:18,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:04:18,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:04:18,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:18,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:04:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:04:18,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-21 09:04:18,465 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 158 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 09:04:18,465 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:18,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-21 09:04:18,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:18,754 INFO L130 PetriNetUnfolder]: 88/697 cut-off events. [2022-11-21 09:04:18,754 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-21 09:04:18,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 697 events. 88/697 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3111 event pairs, 32 based on Foata normal form. 69/700 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-21 09:04:18,764 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 20 selfloop transitions, 3 changer transitions 0/156 dead transitions. [2022-11-21 09:04:18,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 156 transitions, 373 flow [2022-11-21 09:04:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:04:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 09:04:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-11-21 09:04:18,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9274509803921569 [2022-11-21 09:04:18,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-11-21 09:04:18,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-11-21 09:04:18,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:18,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-11-21 09:04:18,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 09:04:18,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 09:04:18,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 09:04:18,812 INFO L175 Difference]: Start difference. First operand has 155 places, 158 transitions, 325 flow. Second operand 3 states and 473 transitions. [2022-11-21 09:04:18,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 156 transitions, 373 flow [2022-11-21 09:04:18,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 156 transitions, 365 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 09:04:18,827 INFO L231 Difference]: Finished difference. Result has 151 places, 150 transitions, 319 flow [2022-11-21 09:04:18,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=151, PETRI_TRANSITIONS=150} [2022-11-21 09:04:18,835 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, -4 predicate places. [2022-11-21 09:04:18,836 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 150 transitions, 319 flow [2022-11-21 09:04:18,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 09:04:18,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:18,837 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:04:18,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 09:04:18,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:18,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:18,839 INFO L85 PathProgramCache]: Analyzing trace with hash 694032677, now seen corresponding path program 1 times [2022-11-21 09:04:18,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:18,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874691358] [2022-11-21 09:04:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:18,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:19,041 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 09:04:19,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:19,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874691358] [2022-11-21 09:04:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874691358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:04:19,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:04:19,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 09:04:19,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082579451] [2022-11-21 09:04:19,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:04:19,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 09:04:19,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 09:04:19,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 09:04:19,046 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 170 [2022-11-21 09:04:19,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 150 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 09:04:19,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:19,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 170 [2022-11-21 09:04:19,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:19,216 INFO L130 PetriNetUnfolder]: 34/588 cut-off events. [2022-11-21 09:04:19,216 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-21 09:04:19,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 588 events. 34/588 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2046 event pairs, 11 based on Foata normal form. 0/551 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-21 09:04:19,222 INFO L137 encePairwiseOnDemand]: 165/170 looper letters, 16 selfloop transitions, 4 changer transitions 0/158 dead transitions. [2022-11-21 09:04:19,222 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 158 transitions, 380 flow [2022-11-21 09:04:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 09:04:19,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 09:04:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2022-11-21 09:04:19,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.913235294117647 [2022-11-21 09:04:19,225 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2022-11-21 09:04:19,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2022-11-21 09:04:19,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:19,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2022-11-21 09:04:19,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states 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 09:04:19,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 09:04:19,230 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 09:04:19,230 INFO L175 Difference]: Start difference. First operand has 151 places, 150 transitions, 319 flow. Second operand 4 states and 621 transitions. [2022-11-21 09:04:19,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 158 transitions, 380 flow [2022-11-21 09:04:19,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 158 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 09:04:19,235 INFO L231 Difference]: Finished difference. Result has 155 places, 153 transitions, 344 flow [2022-11-21 09:04:19,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=155, PETRI_TRANSITIONS=153} [2022-11-21 09:04:19,236 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-11-21 09:04:19,236 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 153 transitions, 344 flow [2022-11-21 09:04:19,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 09:04:19,237 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:19,237 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:04:19,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 09:04:19,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:19,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:19,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1141351082, now seen corresponding path program 1 times [2022-11-21 09:04:19,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:19,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125356937] [2022-11-21 09:04:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:19,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:19,356 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 09:04:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125356937] [2022-11-21 09:04:19,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125356937] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:04:19,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:04:19,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:04:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678695766] [2022-11-21 09:04:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:04:19,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:04:19,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:19,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:04:19,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:04:19,363 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-21 09:04:19,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 153 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 09:04:19,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:19,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-21 09:04:19,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:19,636 INFO L130 PetriNetUnfolder]: 127/1265 cut-off events. [2022-11-21 09:04:19,637 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-21 09:04:19,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670 conditions, 1265 events. 127/1265 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6947 event pairs, 33 based on Foata normal form. 12/1203 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-21 09:04:19,647 INFO L137 encePairwiseOnDemand]: 164/170 looper letters, 25 selfloop transitions, 4 changer transitions 0/165 dead transitions. [2022-11-21 09:04:19,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 165 transitions, 435 flow [2022-11-21 09:04:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:04:19,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 09:04:19,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-11-21 09:04:19,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9176470588235294 [2022-11-21 09:04:19,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-11-21 09:04:19,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-11-21 09:04:19,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:19,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-11-21 09:04:19,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:19,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 09:04:19,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 09:04:19,657 INFO L175 Difference]: Start difference. First operand has 155 places, 153 transitions, 344 flow. Second operand 3 states and 468 transitions. [2022-11-21 09:04:19,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 165 transitions, 435 flow [2022-11-21 09:04:19,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 165 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 09:04:19,664 INFO L231 Difference]: Finished difference. Result has 158 places, 157 transitions, 384 flow [2022-11-21 09:04:19,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=158, PETRI_TRANSITIONS=157} [2022-11-21 09:04:19,669 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 3 predicate places. [2022-11-21 09:04:19,669 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 157 transitions, 384 flow [2022-11-21 09:04:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states 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 09:04:19,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:19,671 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:04:19,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 09:04:19,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:19,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:19,673 INFO L85 PathProgramCache]: Analyzing trace with hash 477260439, now seen corresponding path program 1 times [2022-11-21 09:04:19,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:19,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530643515] [2022-11-21 09:04:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:19,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530643515] [2022-11-21 09:04:19,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530643515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:19,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627527371] [2022-11-21 09:04:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:19,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:19,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:19,958 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:19,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 09:04:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:20,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:04:20,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:20,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:20,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627527371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:04:20,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:04:20,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 09:04:20,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697863210] [2022-11-21 09:04:20,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:04:20,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 09:04:20,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:20,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 09:04:20,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 09:04:20,484 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 170 [2022-11-21 09:04:20,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 157 transitions, 384 flow. Second operand has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states 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 09:04:20,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:20,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 170 [2022-11-21 09:04:20,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:21,205 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([460] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][178], [26#L1022-4true, 33#L1010true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 190#true, 86#L945-2true, 186#(<= 1 ~top~0), Black: 184#true, Black: 172#(= ~top~0 0)]) [2022-11-21 09:04:21,205 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-21 09:04:21,206 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-21 09:04:21,206 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-21 09:04:21,206 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-21 09:04:21,207 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([461] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][179], [154#L1008-1true, 26#L1022-4true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 86#L945-2true, 184#true, Black: 186#(<= 1 ~top~0), 222#(<= ~top~0 0), Black: 172#(= ~top~0 0)]) [2022-11-21 09:04:21,207 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-21 09:04:21,207 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-21 09:04:21,207 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-21 09:04:21,208 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-21 09:04:21,310 INFO L130 PetriNetUnfolder]: 387/2731 cut-off events. [2022-11-21 09:04:21,311 INFO L131 PetriNetUnfolder]: For 972/1058 co-relation queries the response was YES. [2022-11-21 09:04:21,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4169 conditions, 2731 events. 387/2731 cut-off events. For 972/1058 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 19218 event pairs, 64 based on Foata normal form. 38/2620 useless extension candidates. Maximal degree in co-relation 3635. Up to 300 conditions per place. [2022-11-21 09:04:21,330 INFO L137 encePairwiseOnDemand]: 161/170 looper letters, 86 selfloop transitions, 46 changer transitions 1/267 dead transitions. [2022-11-21 09:04:21,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 1066 flow [2022-11-21 09:04:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 09:04:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 09:04:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2723 transitions. [2022-11-21 09:04:21,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8898692810457516 [2022-11-21 09:04:21,337 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2723 transitions. [2022-11-21 09:04:21,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2723 transitions. [2022-11-21 09:04:21,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:21,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2723 transitions. [2022-11-21 09:04:21,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 151.27777777777777) internal successors, (2723), 18 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states 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 09:04:21,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states 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 09:04:21,353 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states 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 09:04:21,354 INFO L175 Difference]: Start difference. First operand has 158 places, 157 transitions, 384 flow. Second operand 18 states and 2723 transitions. [2022-11-21 09:04:21,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 1066 flow [2022-11-21 09:04:21,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 267 transitions, 1004 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-21 09:04:21,362 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 755 flow [2022-11-21 09:04:21,363 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=755, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2022-11-21 09:04:21,364 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 24 predicate places. [2022-11-21 09:04:21,364 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 755 flow [2022-11-21 09:04:21,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states 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 09:04:21,365 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:21,365 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:04:21,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 09:04:21,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:21,572 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:21,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1349207881, now seen corresponding path program 1 times [2022-11-21 09:04:21,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:21,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586006529] [2022-11-21 09:04:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:21,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:21,799 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 09:04:21,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:21,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586006529] [2022-11-21 09:04:21,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586006529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:04:21,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:04:21,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 09:04:21,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764928556] [2022-11-21 09:04:21,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:04:21,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 09:04:21,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:21,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 09:04:21,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 09:04:21,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 170 [2022-11-21 09:04:21,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 755 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states 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 09:04:21,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:21,804 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 170 [2022-11-21 09:04:21,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:22,071 INFO L130 PetriNetUnfolder]: 54/1105 cut-off events. [2022-11-21 09:04:22,072 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-21 09:04:22,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1105 events. 54/1105 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4850 event pairs, 9 based on Foata normal form. 18/1080 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-11-21 09:04:22,079 INFO L137 encePairwiseOnDemand]: 166/170 looper letters, 12 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2022-11-21 09:04:22,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 171 transitions, 532 flow [2022-11-21 09:04:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 09:04:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 09:04:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2022-11-21 09:04:22,082 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9058823529411765 [2022-11-21 09:04:22,083 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2022-11-21 09:04:22,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2022-11-21 09:04:22,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:22,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2022-11-21 09:04:22,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states 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 09:04:22,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 09:04:22,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 09:04:22,087 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 755 flow. Second operand 3 states and 462 transitions. [2022-11-21 09:04:22,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 171 transitions, 532 flow [2022-11-21 09:04:22,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 171 transitions, 510 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-21 09:04:22,094 INFO L231 Difference]: Finished difference. Result has 169 places, 169 transitions, 479 flow [2022-11-21 09:04:22,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=169, PETRI_TRANSITIONS=169} [2022-11-21 09:04:22,099 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 14 predicate places. [2022-11-21 09:04:22,099 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 169 transitions, 479 flow [2022-11-21 09:04:22,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states 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 09:04:22,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:22,100 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:04:22,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 09:04:22,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:22,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1885154879, now seen corresponding path program 1 times [2022-11-21 09:04:22,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:22,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003803497] [2022-11-21 09:04:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:24,480 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 09:04:24,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:24,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003803497] [2022-11-21 09:04:24,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003803497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:04:24,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:04:24,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-21 09:04:24,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066131659] [2022-11-21 09:04:24,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:04:24,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 09:04:24,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:24,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 09:04:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-11-21 09:04:24,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-21 09:04:24,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 169 transitions, 479 flow. Second operand has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 09:04:24,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:24,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-21 09:04:24,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:27,918 INFO L130 PetriNetUnfolder]: 1109/4445 cut-off events. [2022-11-21 09:04:27,919 INFO L131 PetriNetUnfolder]: For 789/789 co-relation queries the response was YES. [2022-11-21 09:04:27,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8358 conditions, 4445 events. 1109/4445 cut-off events. For 789/789 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 33497 event pairs, 163 based on Foata normal form. 0/4293 useless extension candidates. Maximal degree in co-relation 4747. Up to 1468 conditions per place. [2022-11-21 09:04:27,948 INFO L137 encePairwiseOnDemand]: 136/170 looper letters, 254 selfloop transitions, 42 changer transitions 2/382 dead transitions. [2022-11-21 09:04:27,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 382 transitions, 1684 flow [2022-11-21 09:04:27,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-21 09:04:27,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-21 09:04:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3209 transitions. [2022-11-21 09:04:27,957 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6089184060721062 [2022-11-21 09:04:27,957 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3209 transitions. [2022-11-21 09:04:27,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3209 transitions. [2022-11-21 09:04:27,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:27,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3209 transitions. [2022-11-21 09:04:27,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 103.51612903225806) internal successors, (3209), 31 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states 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 09:04:27,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 170.0) internal successors, (5440), 32 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states 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 09:04:27,983 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 170.0) internal successors, (5440), 32 states have internal predecessors, (5440), 0 states have call successors, (0), 0 states 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 09:04:27,984 INFO L175 Difference]: Start difference. First operand has 169 places, 169 transitions, 479 flow. Second operand 31 states and 3209 transitions. [2022-11-21 09:04:27,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 382 transitions, 1684 flow [2022-11-21 09:04:27,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 382 transitions, 1680 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 09:04:27,995 INFO L231 Difference]: Finished difference. Result has 225 places, 207 transitions, 793 flow [2022-11-21 09:04:27,995 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=793, PETRI_PLACES=225, PETRI_TRANSITIONS=207} [2022-11-21 09:04:27,998 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 70 predicate places. [2022-11-21 09:04:27,999 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 207 transitions, 793 flow [2022-11-21 09:04:28,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 09:04:28,006 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:28,007 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:04:28,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 09:04:28,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash -498230787, now seen corresponding path program 2 times [2022-11-21 09:04:28,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:28,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340754386] [2022-11-21 09:04:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:28,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:30,594 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 09:04:30,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:30,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340754386] [2022-11-21 09:04:30,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340754386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:04:30,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:04:30,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-21 09:04:30,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820711717] [2022-11-21 09:04:30,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:04:30,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 09:04:30,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:30,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 09:04:30,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-11-21 09:04:30,599 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-21 09:04:30,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 207 transitions, 793 flow. Second operand has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 09:04:30,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:30,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-21 09:04:30,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:35,514 INFO L130 PetriNetUnfolder]: 1488/5983 cut-off events. [2022-11-21 09:04:35,514 INFO L131 PetriNetUnfolder]: For 2945/2947 co-relation queries the response was YES. [2022-11-21 09:04:35,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13027 conditions, 5983 events. 1488/5983 cut-off events. For 2945/2947 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 49013 event pairs, 314 based on Foata normal form. 4/5867 useless extension candidates. Maximal degree in co-relation 7835. Up to 1503 conditions per place. [2022-11-21 09:04:35,583 INFO L137 encePairwiseOnDemand]: 134/170 looper letters, 259 selfloop transitions, 60 changer transitions 2/397 dead transitions. [2022-11-21 09:04:35,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 397 transitions, 2185 flow [2022-11-21 09:04:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 09:04:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-21 09:04:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2918 transitions. [2022-11-21 09:04:35,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5363970588235294 [2022-11-21 09:04:35,593 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2918 transitions. [2022-11-21 09:04:35,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2918 transitions. [2022-11-21 09:04:35,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:35,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2918 transitions. [2022-11-21 09:04:35,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.1875) internal successors, (2918), 32 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states 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 09:04:35,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 170.0) internal successors, (5610), 33 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 09:04:35,616 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 170.0) internal successors, (5610), 33 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states 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 09:04:35,616 INFO L175 Difference]: Start difference. First operand has 225 places, 207 transitions, 793 flow. Second operand 32 states and 2918 transitions. [2022-11-21 09:04:35,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 397 transitions, 2185 flow [2022-11-21 09:04:35,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 397 transitions, 2181 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 09:04:35,635 INFO L231 Difference]: Finished difference. Result has 269 places, 226 transitions, 1111 flow [2022-11-21 09:04:35,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1111, PETRI_PLACES=269, PETRI_TRANSITIONS=226} [2022-11-21 09:04:35,636 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 114 predicate places. [2022-11-21 09:04:35,637 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 226 transitions, 1111 flow [2022-11-21 09:04:35,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 09:04:35,638 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:35,638 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:04:35,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 09:04:35,639 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash 77169637, now seen corresponding path program 3 times [2022-11-21 09:04:35,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:35,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957090439] [2022-11-21 09:04:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:35,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:38,267 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 09:04:38,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:38,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957090439] [2022-11-21 09:04:38,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957090439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:04:38,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:04:38,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-21 09:04:38,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498385139] [2022-11-21 09:04:38,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:04:38,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 09:04:38,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:38,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 09:04:38,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-11-21 09:04:38,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 170 [2022-11-21 09:04:38,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 226 transitions, 1111 flow. Second operand has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states 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 09:04:38,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:38,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 170 [2022-11-21 09:04:38,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:43,490 INFO L130 PetriNetUnfolder]: 1792/7572 cut-off events. [2022-11-21 09:04:43,491 INFO L131 PetriNetUnfolder]: For 5108/5111 co-relation queries the response was YES. [2022-11-21 09:04:43,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17104 conditions, 7572 events. 1792/7572 cut-off events. For 5108/5111 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 66507 event pairs, 273 based on Foata normal form. 8/7429 useless extension candidates. Maximal degree in co-relation 9319. Up to 1276 conditions per place. [2022-11-21 09:04:43,570 INFO L137 encePairwiseOnDemand]: 144/170 looper letters, 233 selfloop transitions, 53 changer transitions 14/388 dead transitions. [2022-11-21 09:04:43,570 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 388 transitions, 2442 flow [2022-11-21 09:04:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-21 09:04:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-21 09:04:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2429 transitions. [2022-11-21 09:04:43,577 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5715294117647058 [2022-11-21 09:04:43,577 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2429 transitions. [2022-11-21 09:04:43,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2429 transitions. [2022-11-21 09:04:43,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:43,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2429 transitions. [2022-11-21 09:04:43,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 97.16) internal successors, (2429), 25 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states 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 09:04:43,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 170.0) internal successors, (4420), 26 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states 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 09:04:43,594 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 170.0) internal successors, (4420), 26 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states 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 09:04:43,594 INFO L175 Difference]: Start difference. First operand has 269 places, 226 transitions, 1111 flow. Second operand 25 states and 2429 transitions. [2022-11-21 09:04:43,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 388 transitions, 2442 flow [2022-11-21 09:04:43,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 388 transitions, 2350 flow, removed 27 selfloop flow, removed 14 redundant places. [2022-11-21 09:04:43,632 INFO L231 Difference]: Finished difference. Result has 287 places, 238 transitions, 1315 flow [2022-11-21 09:04:43,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1315, PETRI_PLACES=287, PETRI_TRANSITIONS=238} [2022-11-21 09:04:43,635 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 132 predicate places. [2022-11-21 09:04:43,636 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 238 transitions, 1315 flow [2022-11-21 09:04:43,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states 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 09:04:43,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:43,638 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:43,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 09:04:43,638 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:43,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:43,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2016832061, now seen corresponding path program 1 times [2022-11-21 09:04:43,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:43,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927868102] [2022-11-21 09:04:43,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:43,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:43,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927868102] [2022-11-21 09:04:43,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927868102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314629329] [2022-11-21 09:04:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:43,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:43,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 09:04:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:43,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 09:04:43,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-21 09:04:44,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:04:44,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314629329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:04:44,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:04:44,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2022-11-21 09:04:44,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044487490] [2022-11-21 09:04:44,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:04:44,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 09:04:44,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:44,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 09:04:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 09:04:44,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-21 09:04:44,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 238 transitions, 1315 flow. Second operand has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:44,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:44,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-21 09:04:44,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:04:45,157 INFO L130 PetriNetUnfolder]: 247/3293 cut-off events. [2022-11-21 09:04:45,158 INFO L131 PetriNetUnfolder]: For 2623/2625 co-relation queries the response was YES. [2022-11-21 09:04:45,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6533 conditions, 3293 events. 247/3293 cut-off events. For 2623/2625 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 23842 event pairs, 67 based on Foata normal form. 13/3233 useless extension candidates. Maximal degree in co-relation 4741. Up to 261 conditions per place. [2022-11-21 09:04:45,183 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 50 selfloop transitions, 30 changer transitions 0/260 dead transitions. [2022-11-21 09:04:45,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 260 transitions, 1522 flow [2022-11-21 09:04:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 09:04:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 09:04:45,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1186 transitions. [2022-11-21 09:04:45,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8720588235294118 [2022-11-21 09:04:45,187 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1186 transitions. [2022-11-21 09:04:45,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1186 transitions. [2022-11-21 09:04:45,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:04:45,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1186 transitions. [2022-11-21 09:04:45,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 148.25) internal successors, (1186), 8 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 09:04:45,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states 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 09:04:45,194 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states 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 09:04:45,194 INFO L175 Difference]: Start difference. First operand has 287 places, 238 transitions, 1315 flow. Second operand 8 states and 1186 transitions. [2022-11-21 09:04:45,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 260 transitions, 1522 flow [2022-11-21 09:04:45,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 260 transitions, 1448 flow, removed 20 selfloop flow, removed 14 redundant places. [2022-11-21 09:04:45,220 INFO L231 Difference]: Finished difference. Result has 285 places, 241 transitions, 1351 flow [2022-11-21 09:04:45,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1351, PETRI_PLACES=285, PETRI_TRANSITIONS=241} [2022-11-21 09:04:45,221 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 130 predicate places. [2022-11-21 09:04:45,221 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 241 transitions, 1351 flow [2022-11-21 09:04:45,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:04:45,222 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:04:45,223 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:04:45,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 09:04:45,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 09:04:45,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:04:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:04:45,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1911220724, now seen corresponding path program 1 times [2022-11-21 09:04:45,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:04:45,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821951145] [2022-11-21 09:04:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:45,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:04:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 09:04:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:04:46,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821951145] [2022-11-21 09:04:46,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821951145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:46,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133232862] [2022-11-21 09:04:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:04:46,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:04:46,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:04:46,990 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:04:46,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 09:04:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:04:47,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-21 09:04:47,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:04:48,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-21 09:04:50,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-21 09:04:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:04:50,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:04:51,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-21 09:04:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 09:04:52,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133232862] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 09:04:52,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:04:52,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [23, 26] total 66 [2022-11-21 09:04:52,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255697029] [2022-11-21 09:04:52,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:04:52,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 09:04:52,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:04:52,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 09:04:52,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4050, Unknown=0, NotChecked=0, Total=4290 [2022-11-21 09:04:52,262 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-21 09:04:52,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 241 transitions, 1351 flow. Second operand has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states 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 09:04:52,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:04:52,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-21 09:04:52,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:02,883 INFO L130 PetriNetUnfolder]: 2639/10837 cut-off events. [2022-11-21 09:05:02,883 INFO L131 PetriNetUnfolder]: For 9116/9116 co-relation queries the response was YES. [2022-11-21 09:05:03,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24866 conditions, 10837 events. 2639/10837 cut-off events. For 9116/9116 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 100656 event pairs, 407 based on Foata normal form. 12/10624 useless extension candidates. Maximal degree in co-relation 22474. Up to 1446 conditions per place. [2022-11-21 09:05:03,039 INFO L137 encePairwiseOnDemand]: 135/170 looper letters, 276 selfloop transitions, 184 changer transitions 3/547 dead transitions. [2022-11-21 09:05:03,039 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 547 transitions, 3746 flow [2022-11-21 09:05:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-21 09:05:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-21 09:05:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 6595 transitions. [2022-11-21 09:05:03,052 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5877896613190731 [2022-11-21 09:05:03,053 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 6595 transitions. [2022-11-21 09:05:03,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 6595 transitions. [2022-11-21 09:05:03,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:03,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 6595 transitions. [2022-11-21 09:05:03,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 99.92424242424242) internal successors, (6595), 66 states have internal predecessors, (6595), 0 states have call successors, (0), 0 states 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 09:05:03,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 170.0) internal successors, (11390), 67 states have internal predecessors, (11390), 0 states have call successors, (0), 0 states 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 09:05:03,090 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 170.0) internal successors, (11390), 67 states have internal predecessors, (11390), 0 states have call successors, (0), 0 states 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 09:05:03,091 INFO L175 Difference]: Start difference. First operand has 285 places, 241 transitions, 1351 flow. Second operand 66 states and 6595 transitions. [2022-11-21 09:05:03,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 547 transitions, 3746 flow [2022-11-21 09:05:03,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 547 transitions, 3686 flow, removed 30 selfloop flow, removed 0 redundant places. [2022-11-21 09:05:03,194 INFO L231 Difference]: Finished difference. Result has 367 places, 366 transitions, 2722 flow [2022-11-21 09:05:03,195 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=2722, PETRI_PLACES=367, PETRI_TRANSITIONS=366} [2022-11-21 09:05:03,196 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 212 predicate places. [2022-11-21 09:05:03,196 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 366 transitions, 2722 flow [2022-11-21 09:05:03,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states 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 09:05:03,197 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:03,198 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:03,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:03,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 09:05:03,409 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:05:03,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:03,409 INFO L85 PathProgramCache]: Analyzing trace with hash -242106828, now seen corresponding path program 2 times [2022-11-21 09:05:03,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:03,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770129931] [2022-11-21 09:05:03,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:03,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 09:05:05,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:05,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770129931] [2022-11-21 09:05:05,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770129931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:05,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481156505] [2022-11-21 09:05:05,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:05:05,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:05,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:05,320 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:05,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 09:05:05,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 09:05:05,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:05,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-21 09:05:05,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:05,593 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 09:05:05,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 09:05:05,610 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 09:05:05,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-21 09:05:06,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-21 09:05:06,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-21 09:05:07,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 21 [2022-11-21 09:05:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 09:05:08,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:09,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:05:09,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-21 09:05:09,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:05:09,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-21 09:05:09,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-21 09:05:10,396 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 09:05:10,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-21 09:05:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 09:05:10,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481156505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:10,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:10,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 73 [2022-11-21 09:05:10,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549880202] [2022-11-21 09:05:10,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:10,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-21 09:05:10,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:10,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-21 09:05:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=4976, Unknown=7, NotChecked=0, Total=5256 [2022-11-21 09:05:10,410 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-21 09:05:10,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 366 transitions, 2722 flow. Second operand has 73 states, 73 states have (on average 86.24657534246575) internal successors, (6296), 73 states have internal predecessors, (6296), 0 states have call successors, (0), 0 states 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 09:05:10,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:10,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-21 09:05:10,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:37,430 INFO L130 PetriNetUnfolder]: 3128/12626 cut-off events. [2022-11-21 09:05:37,430 INFO L131 PetriNetUnfolder]: For 13468/13475 co-relation queries the response was YES. [2022-11-21 09:05:37,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32404 conditions, 12626 events. 3128/12626 cut-off events. For 13468/13475 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 122261 event pairs, 155 based on Foata normal form. 8/12385 useless extension candidates. Maximal degree in co-relation 29594. Up to 1715 conditions per place. [2022-11-21 09:05:37,587 INFO L137 encePairwiseOnDemand]: 132/170 looper letters, 277 selfloop transitions, 264 changer transitions 3/620 dead transitions. [2022-11-21 09:05:37,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 620 transitions, 4944 flow [2022-11-21 09:05:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-11-21 09:05:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2022-11-21 09:05:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6391 transitions. [2022-11-21 09:05:37,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5149879129734085 [2022-11-21 09:05:37,599 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6391 transitions. [2022-11-21 09:05:37,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6391 transitions. [2022-11-21 09:05:37,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:37,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6391 transitions. [2022-11-21 09:05:37,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 87.54794520547945) internal successors, (6391), 73 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states 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 09:05:37,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 170.0) internal successors, (12580), 74 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states 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 09:05:37,642 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 170.0) internal successors, (12580), 74 states have internal predecessors, (12580), 0 states have call successors, (0), 0 states 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 09:05:37,642 INFO L175 Difference]: Start difference. First operand has 367 places, 366 transitions, 2722 flow. Second operand 73 states and 6391 transitions. [2022-11-21 09:05:37,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 620 transitions, 4944 flow [2022-11-21 09:05:37,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 620 transitions, 4568 flow, removed 161 selfloop flow, removed 11 redundant places. [2022-11-21 09:05:37,836 INFO L231 Difference]: Finished difference. Result has 443 places, 441 transitions, 3658 flow [2022-11-21 09:05:37,837 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=3658, PETRI_PLACES=443, PETRI_TRANSITIONS=441} [2022-11-21 09:05:37,837 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 288 predicate places. [2022-11-21 09:05:37,838 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 441 transitions, 3658 flow [2022-11-21 09:05:37,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 86.24657534246575) internal successors, (6296), 73 states have internal predecessors, (6296), 0 states have call successors, (0), 0 states 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 09:05:37,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:37,840 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:37,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:38,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:38,046 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:05:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash -24835102, now seen corresponding path program 2 times [2022-11-21 09:05:38,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:38,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868873547] [2022-11-21 09:05:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:38,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-21 09:05:38,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:38,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868873547] [2022-11-21 09:05:38,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868873547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:38,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659588199] [2022-11-21 09:05:38,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:05:38,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:38,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:38,279 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:38,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 09:05:38,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:05:38,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:38,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 09:05:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-21 09:05:38,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 61 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-21 09:05:39,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659588199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:39,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:39,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-21 09:05:39,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381041909] [2022-11-21 09:05:39,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:39,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 09:05:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:39,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 09:05:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-21 09:05:39,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-21 09:05:39,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 441 transitions, 3658 flow. Second operand has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 09:05:39,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:39,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-21 09:05:39,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:41,261 INFO L130 PetriNetUnfolder]: 568/6623 cut-off events. [2022-11-21 09:05:41,261 INFO L131 PetriNetUnfolder]: For 9854/9860 co-relation queries the response was YES. [2022-11-21 09:05:41,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16460 conditions, 6623 events. 568/6623 cut-off events. For 9854/9860 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 56452 event pairs, 133 based on Foata normal form. 20/6461 useless extension candidates. Maximal degree in co-relation 15090. Up to 244 conditions per place. [2022-11-21 09:05:41,329 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 94 selfloop transitions, 139 changer transitions 1/534 dead transitions. [2022-11-21 09:05:41,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 534 transitions, 4810 flow [2022-11-21 09:05:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 09:05:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-21 09:05:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3214 transitions. [2022-11-21 09:05:41,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8593582887700535 [2022-11-21 09:05:41,334 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3214 transitions. [2022-11-21 09:05:41,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3214 transitions. [2022-11-21 09:05:41,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:41,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3214 transitions. [2022-11-21 09:05:41,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.0909090909091) internal successors, (3214), 22 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states 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 09:05:41,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states 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 09:05:41,352 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states 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 09:05:41,352 INFO L175 Difference]: Start difference. First operand has 443 places, 441 transitions, 3658 flow. Second operand 22 states and 3214 transitions. [2022-11-21 09:05:41,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 534 transitions, 4810 flow [2022-11-21 09:05:41,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 534 transitions, 4471 flow, removed 76 selfloop flow, removed 21 redundant places. [2022-11-21 09:05:41,465 INFO L231 Difference]: Finished difference. Result has 448 places, 473 transitions, 4073 flow [2022-11-21 09:05:41,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4073, PETRI_PLACES=448, PETRI_TRANSITIONS=473} [2022-11-21 09:05:41,467 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 293 predicate places. [2022-11-21 09:05:41,467 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 473 transitions, 4073 flow [2022-11-21 09:05:41,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 09:05:41,468 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:41,468 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:41,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:41,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 09:05:41,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:05:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:41,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2118414465, now seen corresponding path program 1 times [2022-11-21 09:05:41,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:41,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241840338] [2022-11-21 09:05:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:41,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 09:05:44,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241840338] [2022-11-21 09:05:44,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241840338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981729372] [2022-11-21 09:05:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:44,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:44,635 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:44,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 09:05:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:44,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-21 09:05:44,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:45,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-21 09:05:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:05:47,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-21 09:05:49,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-21 09:05:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 5 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:49,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:55,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-11-21 09:05:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:57,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981729372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:57,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:57,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 32] total 95 [2022-11-21 09:05:57,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873543598] [2022-11-21 09:05:57,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:57,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-11-21 09:05:57,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:57,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-11-21 09:05:57,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=8184, Unknown=1, NotChecked=0, Total=8930 [2022-11-21 09:05:57,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-21 09:05:57,400 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 473 transitions, 4073 flow. Second operand has 95 states, 95 states have (on average 98.05263157894737) internal successors, (9315), 95 states have internal predecessors, (9315), 0 states have call successors, (0), 0 states 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 09:05:57,400 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:57,400 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-21 09:05:57,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:07:03,604 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:07:07,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:07:09,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:07:11,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:07:55,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:08:40,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:08:42,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:09:04,367 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:09:06,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:09:21,873 INFO L130 PetriNetUnfolder]: 7538/30433 cut-off events. [2022-11-21 09:09:21,873 INFO L131 PetriNetUnfolder]: For 43473/43480 co-relation queries the response was YES. [2022-11-21 09:09:22,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83023 conditions, 30433 events. 7538/30433 cut-off events. For 43473/43480 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 324718 event pairs, 1097 based on Foata normal form. 91/29943 useless extension candidates. Maximal degree in co-relation 74915. Up to 4616 conditions per place. [2022-11-21 09:09:22,244 INFO L137 encePairwiseOnDemand]: 130/170 looper letters, 1481 selfloop transitions, 917 changer transitions 326/2808 dead transitions. [2022-11-21 09:09:22,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 2808 transitions, 23225 flow [2022-11-21 09:09:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-21 09:09:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2022-11-21 09:09:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 40215 transitions. [2022-11-21 09:09:22,308 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5855416423995341 [2022-11-21 09:09:22,308 INFO L72 ComplementDD]: Start complementDD. Operand 404 states and 40215 transitions. [2022-11-21 09:09:22,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 404 states and 40215 transitions. [2022-11-21 09:09:22,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:09:22,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 404 states and 40215 transitions. [2022-11-21 09:09:22,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 405 states, 404 states have (on average 99.54207920792079) internal successors, (40215), 404 states have internal predecessors, (40215), 0 states have call successors, (0), 0 states 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 09:09:22,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 405 states, 405 states have (on average 170.0) internal successors, (68850), 405 states have internal predecessors, (68850), 0 states have call successors, (0), 0 states 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 09:09:22,742 INFO L81 ComplementDD]: Finished complementDD. Result has 405 states, 405 states have (on average 170.0) internal successors, (68850), 405 states have internal predecessors, (68850), 0 states have call successors, (0), 0 states 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 09:09:22,742 INFO L175 Difference]: Start difference. First operand has 448 places, 473 transitions, 4073 flow. Second operand 404 states and 40215 transitions. [2022-11-21 09:09:22,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 2808 transitions, 23225 flow [2022-11-21 09:09:23,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 844 places, 2808 transitions, 22578 flow, removed 232 selfloop flow, removed 7 redundant places. [2022-11-21 09:09:23,219 INFO L231 Difference]: Finished difference. Result has 970 places, 1405 transitions, 14973 flow [2022-11-21 09:09:23,221 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=404, PETRI_FLOW=14973, PETRI_PLACES=970, PETRI_TRANSITIONS=1405} [2022-11-21 09:09:23,222 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 815 predicate places. [2022-11-21 09:09:23,222 INFO L495 AbstractCegarLoop]: Abstraction has has 970 places, 1405 transitions, 14973 flow [2022-11-21 09:09:23,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 98.05263157894737) internal successors, (9315), 95 states have internal predecessors, (9315), 0 states have call successors, (0), 0 states 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 09:09:23,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:09:23,225 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:09:23,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 09:09:23,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:09:23,432 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 09:09:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:09:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1011175011, now seen corresponding path program 2 times [2022-11-21 09:09:23,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:09:23,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748877399] [2022-11-21 09:09:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:09:23,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:09:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:09:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:28,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:09:28,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748877399] [2022-11-21 09:09:28,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748877399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:09:28,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241933072] [2022-11-21 09:09:28,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:09:28,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:09:28,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:09:28,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:09:28,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57c17fef-bc58-43a4-b6b9-bd8b9d54443d/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 09:09:28,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:09:28,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:09:28,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-21 09:09:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:09:28,553 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 09:09:28,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 09:09:28,581 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 09:09:28,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-21 09:09:29,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-21 09:09:30,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-21 09:09:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 09:09:31,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-21 09:09:33,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-21 09:09:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:33,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:09:36,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:09:36,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-21 09:09:36,914 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 09:09:36,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-21 09:09:36,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-21 09:09:38,570 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 09:09:38,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-21 09:09:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:38,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241933072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:09:38,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:09:38,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 34, 34] total 96 [2022-11-21 09:09:38,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189982708] [2022-11-21 09:09:38,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:09:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-21 09:09:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:09:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-21 09:09:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=648, Invalid=8468, Unknown=4, NotChecked=0, Total=9120 [2022-11-21 09:09:38,669 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-21 09:09:38,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 970 places, 1405 transitions, 14973 flow. Second operand has 96 states, 96 states have (on average 86.04166666666667) internal successors, (8260), 96 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states 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 09:09:38,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:09:38,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-21 09:09:38,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:10:38,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:11:39,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:11:41,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:11:52,721 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 116 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:12:06,287 WARN L233 SmtUtils]: Spent 11.28s on a formula simplification. DAG size of input: 131 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:12:08,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:12:20,931 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 122 DAG size of output: 116 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:12:36,771 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 107 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:12:50,014 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 122 DAG size of output: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:12:59,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:13:01,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:13:04,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:13:35,403 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:13:50,418 WARN L233 SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:14:06,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:15:35,294 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 137 DAG size of output: 133 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:15:44,136 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 151 DAG size of output: 147 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:16:27,157 WARN L233 SmtUtils]: Spent 8.75s on a formula simplification. DAG size of input: 130 DAG size of output: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:16:35,550 WARN L233 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 136 DAG size of output: 131 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-21 09:16:37,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:16:39,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:16:42,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:16:44,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 09:17:33,531 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)