./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c --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_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/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_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/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_b28fc49f-46d5-4323-8d4d-0465e01c6de0/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 65bf47faf943da19c0d2d15e35f35ceed9dd68ed50ac4355a0589bd57bf3d155 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:24:24,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:24:24,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:24:24,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:24:24,522 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:24:24,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:24:24,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:24:24,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:24:24,551 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:24:24,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:24:24,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:24:24,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:24:24,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:24:24,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:24:24,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:24:24,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:24:24,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:24:24,562 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:24:24,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:24:24,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:24:24,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:24:24,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:24:24,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:24:24,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:24:24,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:24:24,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:24:24,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:24:24,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:24:24,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:24:24,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:24:24,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:24:24,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:24:24,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:24:24,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:24:24,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:24:24,605 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:24:24,606 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:24:24,606 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:24:24,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:24:24,615 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:24:24,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:24:24,617 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:24:24,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:24:24,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:24:24,649 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:24:24,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:24:24,650 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:24:24,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:24:24,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:24:24,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:24:24,652 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:24:24,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:24:24,653 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:24:24,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:24:24,653 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:24:24,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:24:24,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:24:24,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:24:24,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:24:24,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:24:24,655 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:24:24,655 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:24:24,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:24:24,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:24:24,655 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:24:24,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:24:24,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:24:24,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:24:24,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:24:24,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:24:24,656 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:24:24,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:24:24,657 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:24:24,657 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:24:24,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:24:24,658 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_b28fc49f-46d5-4323-8d4d-0465e01c6de0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65bf47faf943da19c0d2d15e35f35ceed9dd68ed50ac4355a0589bd57bf3d155 [2022-11-21 16:24:24,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:24:25,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:24:25,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:24:25,017 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:24:25,017 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:24:25,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2022-11-21 16:24:28,106 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:24:28,342 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:24:28,343 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2022-11-21 16:24:28,352 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/data/42dba42dd/f4d02331e3fc4a02859031f8d5189a39/FLAG0e3993991 [2022-11-21 16:24:28,369 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/data/42dba42dd/f4d02331e3fc4a02859031f8d5189a39 [2022-11-21 16:24:28,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:24:28,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:24:28,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:24:28,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:24:28,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:24:28,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579a0f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28, skipping insertion in model container [2022-11-21 16:24:28,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:24:28,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:24:28,581 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_b28fc49f-46d5-4323-8d4d-0465e01c6de0/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c[2476,2489] [2022-11-21 16:24:28,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:24:28,606 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:24:28,632 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_b28fc49f-46d5-4323-8d4d-0465e01c6de0/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c[2476,2489] [2022-11-21 16:24:28,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:24:28,654 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:24:28,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28 WrapperNode [2022-11-21 16:24:28,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:24:28,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:24:28,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:24:28,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:24:28,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,670 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,694 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 116 [2022-11-21 16:24:28,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:24:28,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:24:28,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:24:28,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:24:28,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,719 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:24:28,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:24:28,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:24:28,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:24:28,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (1/1) ... [2022-11-21 16:24:28,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:24:28,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:24:28,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:24:28,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:24:28,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:24:28,803 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:24:28,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:24:28,805 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:24:28,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:24:28,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-21 16:24:28,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-21 16:24:28,812 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-21 16:24:28,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-21 16:24:28,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:24:28,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:24:28,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:24:28,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:24:28,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:24:28,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:24:28,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:24:28,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:24:28,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:24:28,816 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:24:28,920 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:24:28,922 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:24:29,244 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:24:29,321 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:24:29,321 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 16:24:29,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:24:29 BoogieIcfgContainer [2022-11-21 16:24:29,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:24:29,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:24:29,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:24:29,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:24:29,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:24:28" (1/3) ... [2022-11-21 16:24:29,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74956569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:24:29, skipping insertion in model container [2022-11-21 16:24:29,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:24:28" (2/3) ... [2022-11-21 16:24:29,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74956569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:24:29, skipping insertion in model container [2022-11-21 16:24:29,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:24:29" (3/3) ... [2022-11-21 16:24:29,336 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-determinism.wvr.c [2022-11-21 16:24:29,349 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:24:29,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:24:29,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 16:24:29,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:24:29,443 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 16:24:29,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 124 transitions, 280 flow [2022-11-21 16:24:29,593 INFO L130 PetriNetUnfolder]: 9/120 cut-off events. [2022-11-21 16:24:29,593 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:24:29,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 120 events. 9/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2022-11-21 16:24:29,599 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 124 transitions, 280 flow [2022-11-21 16:24:29,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 107 transitions, 238 flow [2022-11-21 16:24:29,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:24:29,627 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;@27ae7456, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:24:29,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 16:24:29,662 INFO L130 PetriNetUnfolder]: 9/106 cut-off events. [2022-11-21 16:24:29,663 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-21 16:24:29,663 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:24:29,664 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:29,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:24:29,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:29,671 INFO L85 PathProgramCache]: Analyzing trace with hash -245410147, now seen corresponding path program 1 times [2022-11-21 16:24:29,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:29,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145395573] [2022-11-21 16:24:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:29,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:29,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:29,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145395573] [2022-11-21 16:24:29,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145395573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:24:29,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:24:29,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:24:29,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312947358] [2022-11-21 16:24:29,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:24:29,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 16:24:29,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:30,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 16:24:30,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 16:24:30,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 124 [2022-11-21 16:24:30,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 107 transitions, 238 flow. Second operand has 2 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:30,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:24:30,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 124 [2022-11-21 16:24:30,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:24:30,320 INFO L130 PetriNetUnfolder]: 121/483 cut-off events. [2022-11-21 16:24:30,320 INFO L131 PetriNetUnfolder]: For 106/107 co-relation queries the response was YES. [2022-11-21 16:24:30,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 483 events. 121/483 cut-off events. For 106/107 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2248 event pairs, 51 based on Foata normal form. 118/532 useless extension candidates. Maximal degree in co-relation 568. Up to 163 conditions per place. [2022-11-21 16:24:30,332 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 12 selfloop transitions, 0 changer transitions 1/102 dead transitions. [2022-11-21 16:24:30,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 102 transitions, 252 flow [2022-11-21 16:24:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 16:24:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 16:24:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 229 transitions. [2022-11-21 16:24:30,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9233870967741935 [2022-11-21 16:24:30,351 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 229 transitions. [2022-11-21 16:24:30,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 229 transitions. [2022-11-21 16:24:30,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:24:30,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 229 transitions. [2022-11-21 16:24:30,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:30,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:30,374 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:30,376 INFO L175 Difference]: Start difference. First operand has 111 places, 107 transitions, 238 flow. Second operand 2 states and 229 transitions. [2022-11-21 16:24:30,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 102 transitions, 252 flow [2022-11-21 16:24:30,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 236 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-21 16:24:30,393 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 210 flow [2022-11-21 16:24:30,395 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=210, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2022-11-21 16:24:30,399 INFO L288 CegarLoopForPetriNet]: 111 programPoint places, -7 predicate places. [2022-11-21 16:24:30,399 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 210 flow [2022-11-21 16:24:30,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 112.0) internal successors, (224), 2 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:30,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:24:30,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:30,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:24:30,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:24:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1683241779, now seen corresponding path program 1 times [2022-11-21 16:24:30,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:30,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779970141] [2022-11-21 16:24:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:30,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:30,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:30,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779970141] [2022-11-21 16:24:30,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779970141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:24:30,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:24:30,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 16:24:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812113916] [2022-11-21 16:24:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:24:30,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:24:30,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:24:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 16:24:30,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 124 [2022-11-21 16:24:30,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:30,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:24:30,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 124 [2022-11-21 16:24:30,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:24:31,191 INFO L130 PetriNetUnfolder]: 107/477 cut-off events. [2022-11-21 16:24:31,191 INFO L131 PetriNetUnfolder]: For 34/35 co-relation queries the response was YES. [2022-11-21 16:24:31,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 477 events. 107/477 cut-off events. For 34/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2127 event pairs, 26 based on Foata normal form. 15/434 useless extension candidates. Maximal degree in co-relation 656. Up to 124 conditions per place. [2022-11-21 16:24:31,197 INFO L137 encePairwiseOnDemand]: 115/124 looper letters, 32 selfloop transitions, 5 changer transitions 5/125 dead transitions. [2022-11-21 16:24:31,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 125 transitions, 354 flow [2022-11-21 16:24:31,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:24:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:24:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 640 transitions. [2022-11-21 16:24:31,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8602150537634409 [2022-11-21 16:24:31,206 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 640 transitions. [2022-11-21 16:24:31,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 640 transitions. [2022-11-21 16:24:31,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:24:31,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 640 transitions. [2022-11-21 16:24:31,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.66666666666667) internal successors, (640), 6 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:31,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:31,213 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:31,213 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 210 flow. Second operand 6 states and 640 transitions. [2022-11-21 16:24:31,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 125 transitions, 354 flow [2022-11-21 16:24:31,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:24:31,219 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 249 flow [2022-11-21 16:24:31,219 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2022-11-21 16:24:31,222 INFO L288 CegarLoopForPetriNet]: 111 programPoint places, 1 predicate places. [2022-11-21 16:24:31,223 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 249 flow [2022-11-21 16:24:31,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:31,224 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:24:31,224 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:31,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:24:31,225 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:24:31,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:31,228 INFO L85 PathProgramCache]: Analyzing trace with hash -549861099, now seen corresponding path program 1 times [2022-11-21 16:24:31,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:31,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187932402] [2022-11-21 16:24:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:31,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:31,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187932402] [2022-11-21 16:24:31,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187932402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:24:31,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:24:31,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:24:31,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679927704] [2022-11-21 16:24:31,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:24:31,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:24:31,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:24:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:24:31,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-21 16:24:31,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:31,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:24:31,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-21 16:24:31,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:24:33,349 INFO L130 PetriNetUnfolder]: 6700/10882 cut-off events. [2022-11-21 16:24:33,350 INFO L131 PetriNetUnfolder]: For 1841/1841 co-relation queries the response was YES. [2022-11-21 16:24:33,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22189 conditions, 10882 events. 6700/10882 cut-off events. For 1841/1841 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 78122 event pairs, 2593 based on Foata normal form. 0/8184 useless extension candidates. Maximal degree in co-relation 22181. Up to 4996 conditions per place. [2022-11-21 16:24:33,444 INFO L137 encePairwiseOnDemand]: 117/124 looper letters, 65 selfloop transitions, 5 changer transitions 11/154 dead transitions. [2022-11-21 16:24:33,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 154 transitions, 551 flow [2022-11-21 16:24:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:24:33,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:24:33,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 616 transitions. [2022-11-21 16:24:33,447 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8279569892473119 [2022-11-21 16:24:33,447 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 616 transitions. [2022-11-21 16:24:33,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 616 transitions. [2022-11-21 16:24:33,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:24:33,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 616 transitions. [2022-11-21 16:24:33,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:33,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:33,452 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:33,452 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 249 flow. Second operand 6 states and 616 transitions. [2022-11-21 16:24:33,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 154 transitions, 551 flow [2022-11-21 16:24:33,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 154 transitions, 547 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-21 16:24:33,462 INFO L231 Difference]: Finished difference. Result has 116 places, 106 transitions, 271 flow [2022-11-21 16:24:33,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=116, PETRI_TRANSITIONS=106} [2022-11-21 16:24:33,465 INFO L288 CegarLoopForPetriNet]: 111 programPoint places, 5 predicate places. [2022-11-21 16:24:33,465 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 106 transitions, 271 flow [2022-11-21 16:24:33,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:33,465 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:24:33,466 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:33,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:24:33,466 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:24:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1678899691, now seen corresponding path program 2 times [2022-11-21 16:24:33,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:33,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233607438] [2022-11-21 16:24:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:33,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:33,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233607438] [2022-11-21 16:24:33,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233607438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:24:33,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110248081] [2022-11-21 16:24:33,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:24:33,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:24:33,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:24:33,671 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:24:33,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:24:33,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:24:33,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:24:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:24:33,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:24:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:33,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:24:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:33,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110248081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:24:33,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:24:33,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-21 16:24:33,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751260273] [2022-11-21 16:24:33,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:24:33,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 16:24:33,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 16:24:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-21 16:24:33,969 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-21 16:24:33,971 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 106 transitions, 271 flow. Second operand has 9 states, 9 states have (on average 93.11111111111111) internal successors, (838), 9 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:33,971 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:24:33,971 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-21 16:24:33,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:24:36,981 INFO L130 PetriNetUnfolder]: 11071/18071 cut-off events. [2022-11-21 16:24:36,982 INFO L131 PetriNetUnfolder]: For 5813/6596 co-relation queries the response was YES. [2022-11-21 16:24:37,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40047 conditions, 18071 events. 11071/18071 cut-off events. For 5813/6596 co-relation queries the response was YES. Maximal size of possible extension queue 964. Compared 143685 event pairs, 1277 based on Foata normal form. 780/16577 useless extension candidates. Maximal degree in co-relation 40037. Up to 2464 conditions per place. [2022-11-21 16:24:37,182 INFO L137 encePairwiseOnDemand]: 116/124 looper letters, 185 selfloop transitions, 24 changer transitions 3/286 dead transitions. [2022-11-21 16:24:37,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 286 transitions, 1280 flow [2022-11-21 16:24:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 16:24:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 16:24:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1452 transitions. [2022-11-21 16:24:37,193 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.836405529953917 [2022-11-21 16:24:37,193 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1452 transitions. [2022-11-21 16:24:37,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1452 transitions. [2022-11-21 16:24:37,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:24:37,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1452 transitions. [2022-11-21 16:24:37,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 103.71428571428571) internal successors, (1452), 14 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:37,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:37,206 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:37,206 INFO L175 Difference]: Start difference. First operand has 116 places, 106 transitions, 271 flow. Second operand 14 states and 1452 transitions. [2022-11-21 16:24:37,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 286 transitions, 1280 flow [2022-11-21 16:24:37,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 286 transitions, 1264 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-21 16:24:37,241 INFO L231 Difference]: Finished difference. Result has 132 places, 132 transitions, 421 flow [2022-11-21 16:24:37,241 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=421, PETRI_PLACES=132, PETRI_TRANSITIONS=132} [2022-11-21 16:24:37,243 INFO L288 CegarLoopForPetriNet]: 111 programPoint places, 21 predicate places. [2022-11-21 16:24:37,243 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 132 transitions, 421 flow [2022-11-21 16:24:37,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.11111111111111) internal successors, (838), 9 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:37,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:24:37,244 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:37,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 16:24:37,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-21 16:24:37,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:24:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1176428957, now seen corresponding path program 1 times [2022-11-21 16:24:37,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:37,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205538571] [2022-11-21 16:24:37,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:37,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:37,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:37,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205538571] [2022-11-21 16:24:37,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205538571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:24:37,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:24:37,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:24:37,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503440943] [2022-11-21 16:24:37,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:24:37,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:24:37,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:37,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:24:37,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:24:37,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-21 16:24:37,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 132 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:37,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:24:37,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-21 16:24:37,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:24:42,190 INFO L130 PetriNetUnfolder]: 17052/27200 cut-off events. [2022-11-21 16:24:42,190 INFO L131 PetriNetUnfolder]: For 29813/32516 co-relation queries the response was YES. [2022-11-21 16:24:42,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73393 conditions, 27200 events. 17052/27200 cut-off events. For 29813/32516 co-relation queries the response was YES. Maximal size of possible extension queue 1834. Compared 232799 event pairs, 6153 based on Foata normal form. 1550/27250 useless extension candidates. Maximal degree in co-relation 73377. Up to 10686 conditions per place. [2022-11-21 16:24:42,445 INFO L137 encePairwiseOnDemand]: 116/124 looper letters, 163 selfloop transitions, 11 changer transitions 4/264 dead transitions. [2022-11-21 16:24:42,446 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 264 transitions, 1334 flow [2022-11-21 16:24:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:24:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:24:42,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 643 transitions. [2022-11-21 16:24:42,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.864247311827957 [2022-11-21 16:24:42,449 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 643 transitions. [2022-11-21 16:24:42,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 643 transitions. [2022-11-21 16:24:42,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:24:42,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 643 transitions. [2022-11-21 16:24:42,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.16666666666667) internal successors, (643), 6 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:42,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:42,454 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:42,454 INFO L175 Difference]: Start difference. First operand has 132 places, 132 transitions, 421 flow. Second operand 6 states and 643 transitions. [2022-11-21 16:24:42,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 264 transitions, 1334 flow [2022-11-21 16:24:42,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 264 transitions, 1334 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:24:42,507 INFO L231 Difference]: Finished difference. Result has 139 places, 141 transitions, 497 flow [2022-11-21 16:24:42,507 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=497, PETRI_PLACES=139, PETRI_TRANSITIONS=141} [2022-11-21 16:24:42,508 INFO L288 CegarLoopForPetriNet]: 111 programPoint places, 28 predicate places. [2022-11-21 16:24:42,508 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 141 transitions, 497 flow [2022-11-21 16:24:42,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:42,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:24:42,509 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:42,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:24:42,510 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:24:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:42,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1018867305, now seen corresponding path program 2 times [2022-11-21 16:24:42,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:42,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594815588] [2022-11-21 16:24:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:42,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:42,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:42,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594815588] [2022-11-21 16:24:42,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594815588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:24:42,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:24:42,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:24:42,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978830486] [2022-11-21 16:24:42,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:24:42,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:24:42,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:42,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:24:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:24:42,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-21 16:24:42,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 141 transitions, 497 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:42,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:24:42,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-21 16:24:42,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:24:46,630 INFO L130 PetriNetUnfolder]: 18979/32966 cut-off events. [2022-11-21 16:24:46,630 INFO L131 PetriNetUnfolder]: For 44292/46394 co-relation queries the response was YES. [2022-11-21 16:24:46,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94273 conditions, 32966 events. 18979/32966 cut-off events. For 44292/46394 co-relation queries the response was YES. Maximal size of possible extension queue 1817. Compared 303954 event pairs, 8868 based on Foata normal form. 1700/33966 useless extension candidates. Maximal degree in co-relation 94254. Up to 16904 conditions per place. [2022-11-21 16:24:46,938 INFO L137 encePairwiseOnDemand]: 117/124 looper letters, 91 selfloop transitions, 9 changer transitions 17/203 dead transitions. [2022-11-21 16:24:46,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 203 transitions, 1048 flow [2022-11-21 16:24:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:24:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:24:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 617 transitions. [2022-11-21 16:24:46,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8293010752688172 [2022-11-21 16:24:46,941 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 617 transitions. [2022-11-21 16:24:46,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 617 transitions. [2022-11-21 16:24:46,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:24:46,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 617 transitions. [2022-11-21 16:24:46,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.83333333333333) internal successors, (617), 6 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:46,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:46,946 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:46,946 INFO L175 Difference]: Start difference. First operand has 139 places, 141 transitions, 497 flow. Second operand 6 states and 617 transitions. [2022-11-21 16:24:46,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 203 transitions, 1048 flow [2022-11-21 16:24:47,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 203 transitions, 1048 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 16:24:47,289 INFO L231 Difference]: Finished difference. Result has 146 places, 141 transitions, 521 flow [2022-11-21 16:24:47,289 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=521, PETRI_PLACES=146, PETRI_TRANSITIONS=141} [2022-11-21 16:24:47,293 INFO L288 CegarLoopForPetriNet]: 111 programPoint places, 35 predicate places. [2022-11-21 16:24:47,293 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 141 transitions, 521 flow [2022-11-21 16:24:47,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:47,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:24:47,295 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:47,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:24:47,297 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:24:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:47,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1004276167, now seen corresponding path program 3 times [2022-11-21 16:24:47,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:47,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125759932] [2022-11-21 16:24:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:47,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:47,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:47,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125759932] [2022-11-21 16:24:47,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125759932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:24:47,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:24:47,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:24:47,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805953890] [2022-11-21 16:24:47,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:24:47,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:24:47,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:47,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:24:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:24:47,423 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-21 16:24:47,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 141 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:47,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:24:47,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-21 16:24:47,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:24:52,345 INFO L130 PetriNetUnfolder]: 24925/41633 cut-off events. [2022-11-21 16:24:52,345 INFO L131 PetriNetUnfolder]: For 56166/57083 co-relation queries the response was YES. [2022-11-21 16:24:52,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122083 conditions, 41633 events. 24925/41633 cut-off events. For 56166/57083 co-relation queries the response was YES. Maximal size of possible extension queue 2114. Compared 376953 event pairs, 8405 based on Foata normal form. 740/41522 useless extension candidates. Maximal degree in co-relation 122061. Up to 16867 conditions per place. [2022-11-21 16:24:53,030 INFO L137 encePairwiseOnDemand]: 117/124 looper letters, 129 selfloop transitions, 15 changer transitions 1/226 dead transitions. [2022-11-21 16:24:53,031 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 226 transitions, 1247 flow [2022-11-21 16:24:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:24:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:24:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 619 transitions. [2022-11-21 16:24:53,035 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.831989247311828 [2022-11-21 16:24:53,035 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 619 transitions. [2022-11-21 16:24:53,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 619 transitions. [2022-11-21 16:24:53,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:24:53,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 619 transitions. [2022-11-21 16:24:53,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:53,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:53,041 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:53,041 INFO L175 Difference]: Start difference. First operand has 146 places, 141 transitions, 521 flow. Second operand 6 states and 619 transitions. [2022-11-21 16:24:53,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 226 transitions, 1247 flow [2022-11-21 16:24:53,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 226 transitions, 1232 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-21 16:24:53,703 INFO L231 Difference]: Finished difference. Result has 150 places, 146 transitions, 597 flow [2022-11-21 16:24:53,703 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=597, PETRI_PLACES=150, PETRI_TRANSITIONS=146} [2022-11-21 16:24:53,704 INFO L288 CegarLoopForPetriNet]: 111 programPoint places, 39 predicate places. [2022-11-21 16:24:53,704 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 146 transitions, 597 flow [2022-11-21 16:24:53,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:53,705 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:24:53,705 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:24:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:24:53,706 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:24:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:53,707 INFO L85 PathProgramCache]: Analyzing trace with hash 883558167, now seen corresponding path program 4 times [2022-11-21 16:24:53,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:53,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177834892] [2022-11-21 16:24:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:53,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:53,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:53,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177834892] [2022-11-21 16:24:53,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177834892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:24:53,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:24:53,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 16:24:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296489818] [2022-11-21 16:24:53,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:24:53,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 16:24:53,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 16:24:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-21 16:24:53,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-21 16:24:53,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 146 transitions, 597 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:24:53,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:24:53,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-21 16:24:53,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:00,355 INFO L130 PetriNetUnfolder]: 29302/51417 cut-off events. [2022-11-21 16:25:00,355 INFO L131 PetriNetUnfolder]: For 102273/106473 co-relation queries the response was YES. [2022-11-21 16:25:00,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154850 conditions, 51417 events. 29302/51417 cut-off events. For 102273/106473 co-relation queries the response was YES. Maximal size of possible extension queue 2668. Compared 502007 event pairs, 9547 based on Foata normal form. 3489/54009 useless extension candidates. Maximal degree in co-relation 154826. Up to 15013 conditions per place. [2022-11-21 16:25:01,167 INFO L137 encePairwiseOnDemand]: 116/124 looper letters, 154 selfloop transitions, 27 changer transitions 9/279 dead transitions. [2022-11-21 16:25:01,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 279 transitions, 1711 flow [2022-11-21 16:25:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:25:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 16:25:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 642 transitions. [2022-11-21 16:25:01,169 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8629032258064516 [2022-11-21 16:25:01,170 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 642 transitions. [2022-11-21 16:25:01,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 642 transitions. [2022-11-21 16:25:01,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:01,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 642 transitions. [2022-11-21 16:25:01,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:01,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:01,174 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:01,174 INFO L175 Difference]: Start difference. First operand has 150 places, 146 transitions, 597 flow. Second operand 6 states and 642 transitions. [2022-11-21 16:25:01,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 279 transitions, 1711 flow [2022-11-21 16:25:01,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 279 transitions, 1676 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-21 16:25:01,532 INFO L231 Difference]: Finished difference. Result has 156 places, 165 transitions, 829 flow [2022-11-21 16:25:01,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=829, PETRI_PLACES=156, PETRI_TRANSITIONS=165} [2022-11-21 16:25:01,534 INFO L288 CegarLoopForPetriNet]: 111 programPoint places, 45 predicate places. [2022-11-21 16:25:01,534 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 165 transitions, 829 flow [2022-11-21 16:25:01,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:01,534 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:01,534 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:01,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:25:01,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:25:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash -866883501, now seen corresponding path program 5 times [2022-11-21 16:25:01,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:01,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852158929] [2022-11-21 16:25:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:01,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:01,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:01,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852158929] [2022-11-21 16:25:01,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852158929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:25:01,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982739145] [2022-11-21 16:25:01,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 16:25:01,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:25:01,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:25:01,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:25:01,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:25:01,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 16:25:01,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:25:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:25:01,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:25:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:01,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:25:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:01,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982739145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:25:01,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:25:01,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-21 16:25:01,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719359272] [2022-11-21 16:25:01,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:25:01,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:25:01,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:01,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:25:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:25:01,896 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-21 16:25:01,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 165 transitions, 829 flow. Second operand has 11 states, 11 states have (on average 93.18181818181819) internal successors, (1025), 11 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:01,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:01,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-21 16:25:01,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:25:09,140 INFO L130 PetriNetUnfolder]: 31399/54519 cut-off events. [2022-11-21 16:25:09,141 INFO L131 PetriNetUnfolder]: For 140451/144699 co-relation queries the response was YES. [2022-11-21 16:25:09,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176854 conditions, 54519 events. 31399/54519 cut-off events. For 140451/144699 co-relation queries the response was YES. Maximal size of possible extension queue 2833. Compared 529423 event pairs, 8644 based on Foata normal form. 4196/57654 useless extension candidates. Maximal degree in co-relation 176827. Up to 13122 conditions per place. [2022-11-21 16:25:09,979 INFO L137 encePairwiseOnDemand]: 116/124 looper letters, 186 selfloop transitions, 42 changer transitions 3/320 dead transitions. [2022-11-21 16:25:09,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 320 transitions, 2261 flow [2022-11-21 16:25:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 16:25:09,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-21 16:25:09,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 953 transitions. [2022-11-21 16:25:09,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8539426523297491 [2022-11-21 16:25:09,983 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 953 transitions. [2022-11-21 16:25:09,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 953 transitions. [2022-11-21 16:25:09,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:25:09,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 953 transitions. [2022-11-21 16:25:09,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.88888888888889) internal successors, (953), 9 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:09,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:09,989 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:09,989 INFO L175 Difference]: Start difference. First operand has 156 places, 165 transitions, 829 flow. Second operand 9 states and 953 transitions. [2022-11-21 16:25:09,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 320 transitions, 2261 flow [2022-11-21 16:25:10,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 320 transitions, 2231 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-21 16:25:10,763 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 1282 flow [2022-11-21 16:25:10,764 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1282, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2022-11-21 16:25:10,764 INFO L288 CegarLoopForPetriNet]: 111 programPoint places, 58 predicate places. [2022-11-21 16:25:10,764 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 1282 flow [2022-11-21 16:25:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 93.18181818181819) internal successors, (1025), 11 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:10,765 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:25:10,765 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:25:10,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-21 16:25:10,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:25:10,978 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-21 16:25:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:25:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash -596869929, now seen corresponding path program 3 times [2022-11-21 16:25:10,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:25:10,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643468844] [2022-11-21 16:25:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:25:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:25:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:25:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:11,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:25:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643468844] [2022-11-21 16:25:11,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643468844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:25:11,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097668622] [2022-11-21 16:25:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 16:25:11,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:25:11,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:25:11,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:25:11,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b28fc49f-46d5-4323-8d4d-0465e01c6de0/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:25:11,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 16:25:11,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:25:11,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 16:25:11,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:25:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:11,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:25:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:25:11,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097668622] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:25:11,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:25:11,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-21 16:25:11,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319647168] [2022-11-21 16:25:11,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:25:11,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 16:25:11,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:25:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 16:25:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:25:11,432 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-21 16:25:11,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 1282 flow. Second operand has 11 states, 11 states have (on average 93.72727272727273) internal successors, (1031), 11 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:25:11,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:25:11,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-21 16:25:11,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand