./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.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_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/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_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/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_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/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 fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- 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 17:09:52,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:09:52,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:09:52,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:09:52,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:09:52,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:09:52,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:09:52,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:09:52,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:09:52,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:09:52,562 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:09:52,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:09:52,566 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:09:52,569 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:09:52,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:09:52,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:09:52,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:09:52,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:09:52,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:09:52,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:09:52,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:09:52,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:09:52,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:09:52,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:09:52,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:09:52,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:09:52,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:09:52,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:09:52,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:09:52,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:09:52,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:09:52,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:09:52,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:09:52,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:09:52,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:09:52,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:09:52,628 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:09:52,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:09:52,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:09:52,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:09:52,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:09:52,635 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:09:52,678 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:09:52,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:09:52,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:09:52,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:09:52,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:09:52,685 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:09:52,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:09:52,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:09:52,686 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:09:52,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:09:52,688 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:09:52,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:09:52,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:09:52,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:09:52,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:09:52,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:09:52,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:09:52,690 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:09:52,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:09:52,690 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:09:52,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:09:52,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:09:52,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:09:52,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:09:52,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:09:52,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:09:52,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:09:52,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:09:52,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:09:52,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:09:52,694 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:09:52,694 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:09:52,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:09:52,695 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_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2022-11-21 17:09:53,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:09:53,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:09:53,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:09:53,133 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:09:53,133 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:09:53,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-11-21 17:09:57,006 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:09:57,253 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:09:57,253 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-11-21 17:09:57,262 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/data/778857270/bd81bc435edb44fc91f695b85b98eabf/FLAG7e93f3067 [2022-11-21 17:09:57,281 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/data/778857270/bd81bc435edb44fc91f695b85b98eabf [2022-11-21 17:09:57,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:09:57,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:09:57,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:09:57,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:09:57,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:09:57,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e8877e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57, skipping insertion in model container [2022-11-21 17:09:57,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:09:57,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:09:57,540 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_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-11-21 17:09:57,547 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:09:57,559 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:09:57,584 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_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-11-21 17:09:57,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:09:57,605 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:09:57,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57 WrapperNode [2022-11-21 17:09:57,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:09:57,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:09:57,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:09:57,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:09:57,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,648 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-11-21 17:09:57,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:09:57,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:09:57,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:09:57,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:09:57,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:09:57,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:09:57,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:09:57,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:09:57,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (1/1) ... [2022-11-21 17:09:57,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:09:57,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:09:57,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:09:57,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:09:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:09:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 17:09:57,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 17:09:57,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 17:09:57,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 17:09:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:09:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:09:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:09:57,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:09:57,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:09:57,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:09:57,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:09:57,778 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 17:09:57,891 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:09:57,893 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:09:58,192 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:09:58,201 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:09:58,201 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 17:09:58,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:09:58 BoogieIcfgContainer [2022-11-21 17:09:58,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:09:58,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:09:58,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:09:58,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:09:58,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:09:57" (1/3) ... [2022-11-21 17:09:58,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7a03d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:09:58, skipping insertion in model container [2022-11-21 17:09:58,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:09:57" (2/3) ... [2022-11-21 17:09:58,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b7a03d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:09:58, skipping insertion in model container [2022-11-21 17:09:58,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:09:58" (3/3) ... [2022-11-21 17:09:58,244 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-11-21 17:09:58,255 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 17:09:58,293 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:09:58,293 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 17:09:58,293 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 17:09:58,380 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 17:09:58,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-11-21 17:09:58,552 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-11-21 17:09:58,552 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 17:09:58,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-11-21 17:09:58,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-11-21 17:09:58,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-11-21 17:09:58,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:09:58,607 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;@2a2edbbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:09:58,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 17:09:58,662 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-11-21 17:09:58,662 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 17:09:58,662 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:09:58,663 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:09:58,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:09:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:09:58,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1149725056, now seen corresponding path program 1 times [2022-11-21 17:09:58,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:09:58,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563299041] [2022-11-21 17:09:58,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:09:58,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:09:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:09:59,066 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 17:09:59,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:09:59,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563299041] [2022-11-21 17:09:59,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563299041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:09:59,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:09:59,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:09:59,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494335876] [2022-11-21 17:09:59,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:09:59,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 17:09:59,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:09:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 17:09:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:09:59,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-11-21 17:09:59,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:09:59,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:09:59,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-11-21 17:09:59,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:09:59,249 INFO L130 PetriNetUnfolder]: 2/69 cut-off events. [2022-11-21 17:09:59,249 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-21 17:09:59,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-11-21 17:09:59,252 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-11-21 17:09:59,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-11-21 17:09:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 17:09:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 17:09:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-11-21 17:09:59,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-11-21 17:09:59,283 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-11-21 17:09:59,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-11-21 17:09:59,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:09:59,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-11-21 17:09:59,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states 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 17:09:59,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 17:09:59,309 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states 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 17:09:59,311 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-11-21 17:09:59,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-11-21 17:09:59,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 17:09:59,328 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-11-21 17:09:59,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-11-21 17:09:59,339 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-11-21 17:09:59,339 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-11-21 17:09:59,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:09:59,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:09:59,340 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:09:59,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:09:59,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:09:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:09:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash 807026320, now seen corresponding path program 1 times [2022-11-21 17:09:59,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:09:59,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526172390] [2022-11-21 17:09:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:09:59,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:09:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:00,083 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 17:10:00,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:00,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526172390] [2022-11-21 17:10:00,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526172390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:00,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:10:00,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-21 17:10:00,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564996877] [2022-11-21 17:10:00,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 17:10:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 17:10:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 17:10:00,092 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-21 17:10:00,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 17:10:00,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:00,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-21 17:10:00,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:00,364 INFO L130 PetriNetUnfolder]: 61/207 cut-off events. [2022-11-21 17:10:00,364 INFO L131 PetriNetUnfolder]: For 10/22 co-relation queries the response was YES. [2022-11-21 17:10:00,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 207 events. 61/207 cut-off events. For 10/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 706 event pairs, 24 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 346. Up to 84 conditions per place. [2022-11-21 17:10:00,368 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-11-21 17:10:00,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-11-21 17:10:00,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:10:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 17:10:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-11-21 17:10:00,373 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-11-21 17:10:00,373 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-11-21 17:10:00,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-11-21 17:10:00,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:00,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-11-21 17:10:00,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states 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 17:10:00,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 17:10:00,380 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 17:10:00,380 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-11-21 17:10:00,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-11-21 17:10:00,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 17:10:00,383 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-11-21 17:10:00,384 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-11-21 17:10:00,385 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-11-21 17:10:00,385 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-11-21 17:10:00,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states 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 17:10:00,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:00,386 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:00,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:10:00,387 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash -542410267, now seen corresponding path program 1 times [2022-11-21 17:10:00,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:00,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290335297] [2022-11-21 17:10:00,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:00,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:00,722 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 17:10:00,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:00,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290335297] [2022-11-21 17:10:00,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290335297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:00,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:10:00,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:10:00,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435115435] [2022-11-21 17:10:00,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:00,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:10:00,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:00,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:10:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:10:00,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-21 17:10:00,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 17:10:00,728 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:00,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-21 17:10:00,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:00,908 INFO L130 PetriNetUnfolder]: 53/200 cut-off events. [2022-11-21 17:10:00,908 INFO L131 PetriNetUnfolder]: For 20/35 co-relation queries the response was YES. [2022-11-21 17:10:00,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 200 events. 53/200 cut-off events. For 20/35 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 711 event pairs, 7 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 364. Up to 58 conditions per place. [2022-11-21 17:10:00,911 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 12 changer transitions 4/92 dead transitions. [2022-11-21 17:10:00,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 92 transitions, 324 flow [2022-11-21 17:10:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:10:00,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 17:10:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 420 transitions. [2022-11-21 17:10:00,915 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-11-21 17:10:00,915 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 420 transitions. [2022-11-21 17:10:00,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 420 transitions. [2022-11-21 17:10:00,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:00,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 420 transitions. [2022-11-21 17:10:00,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 0 states 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 17:10:00,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 17:10:00,921 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 17:10:00,921 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 7 states and 420 transitions. [2022-11-21 17:10:00,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 92 transitions, 324 flow [2022-11-21 17:10:00,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 311 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-21 17:10:00,926 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 219 flow [2022-11-21 17:10:00,926 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2022-11-21 17:10:00,927 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2022-11-21 17:10:00,927 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 219 flow [2022-11-21 17:10:00,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 17:10:00,928 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:00,928 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] [2022-11-21 17:10:00,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:10:00,929 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash 920803105, now seen corresponding path program 2 times [2022-11-21 17:10:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:00,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732180441] [2022-11-21 17:10:00,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:00,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:01,141 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 17:10:01,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732180441] [2022-11-21 17:10:01,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732180441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:01,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:10:01,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:10:01,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270240552] [2022-11-21 17:10:01,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:01,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:10:01,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:10:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:10:01,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-21 17:10:01,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 17:10:01,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:01,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-21 17:10:01,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:01,399 INFO L130 PetriNetUnfolder]: 50/198 cut-off events. [2022-11-21 17:10:01,399 INFO L131 PetriNetUnfolder]: For 96/102 co-relation queries the response was YES. [2022-11-21 17:10:01,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 198 events. 50/198 cut-off events. For 96/102 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 699 event pairs, 14 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 425. Up to 46 conditions per place. [2022-11-21 17:10:01,408 INFO L137 encePairwiseOnDemand]: 73/84 looper letters, 31 selfloop transitions, 17 changer transitions 4/95 dead transitions. [2022-11-21 17:10:01,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 95 transitions, 400 flow [2022-11-21 17:10:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:10:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 17:10:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 418 transitions. [2022-11-21 17:10:01,411 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7108843537414966 [2022-11-21 17:10:01,411 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 418 transitions. [2022-11-21 17:10:01,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 418 transitions. [2022-11-21 17:10:01,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:01,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 418 transitions. [2022-11-21 17:10:01,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.714285714285715) internal successors, (418), 7 states have internal predecessors, (418), 0 states have call successors, (0), 0 states 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 17:10:01,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 17:10:01,419 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 17:10:01,423 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 219 flow. Second operand 7 states and 418 transitions. [2022-11-21 17:10:01,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 95 transitions, 400 flow [2022-11-21 17:10:01,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-21 17:10:01,437 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 317 flow [2022-11-21 17:10:01,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2022-11-21 17:10:01,440 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-11-21 17:10:01,441 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 317 flow [2022-11-21 17:10:01,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 17:10:01,442 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:01,447 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] [2022-11-21 17:10:01,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:10:01,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:01,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:01,449 INFO L85 PathProgramCache]: Analyzing trace with hash 201255641, now seen corresponding path program 1 times [2022-11-21 17:10:01,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:01,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228027600] [2022-11-21 17:10:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:01,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:01,729 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 17:10:01,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:01,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228027600] [2022-11-21 17:10:01,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228027600] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:01,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302746216] [2022-11-21 17:10:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:01,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:01,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:01,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:01,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 17:10:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 17:10:01,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:02,171 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 17:10:02,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:02,388 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 17:10:02,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302746216] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:02,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 17:10:02,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-21 17:10:02,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320394837] [2022-11-21 17:10:02,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:02,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:10:02,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:02,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:10:02,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-21 17:10:02,398 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-21 17:10:02,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 17:10:02,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:02,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-21 17:10:02,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:02,572 INFO L130 PetriNetUnfolder]: 49/229 cut-off events. [2022-11-21 17:10:02,572 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2022-11-21 17:10:02,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 229 events. 49/229 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 787 event pairs, 17 based on Foata normal form. 7/233 useless extension candidates. Maximal degree in co-relation 599. Up to 79 conditions per place. [2022-11-21 17:10:02,576 INFO L137 encePairwiseOnDemand]: 74/84 looper letters, 48 selfloop transitions, 12 changer transitions 1/104 dead transitions. [2022-11-21 17:10:02,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 559 flow [2022-11-21 17:10:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 17:10:02,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 17:10:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-11-21 17:10:02,581 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-11-21 17:10:02,581 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-11-21 17:10:02,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-11-21 17:10:02,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:02,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-11-21 17:10:02,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 17:10:02,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 17:10:02,587 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states 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 17:10:02,587 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 317 flow. Second operand 6 states and 365 transitions. [2022-11-21 17:10:02,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 559 flow [2022-11-21 17:10:02,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 553 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-21 17:10:02,601 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 380 flow [2022-11-21 17:10:02,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2022-11-21 17:10:02,605 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2022-11-21 17:10:02,605 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 380 flow [2022-11-21 17:10:02,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 17:10:02,606 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:02,607 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] [2022-11-21 17:10:02,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:02,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:02,817 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:02,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2022-11-21 17:10:02,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:02,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218737200] [2022-11-21 17:10:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:02,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:02,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:02,971 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 17:10:02,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:02,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218737200] [2022-11-21 17:10:02,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218737200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:02,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:10:02,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-21 17:10:02,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234794848] [2022-11-21 17:10:02,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:02,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 17:10:02,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 17:10:02,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 17:10:02,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-21 17:10:02,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 17:10:02,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:02,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-21 17:10:02,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:03,150 INFO L130 PetriNetUnfolder]: 50/222 cut-off events. [2022-11-21 17:10:03,150 INFO L131 PetriNetUnfolder]: For 549/549 co-relation queries the response was YES. [2022-11-21 17:10:03,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 222 events. 50/222 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 765 event pairs, 13 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 634. Up to 60 conditions per place. [2022-11-21 17:10:03,154 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 41 selfloop transitions, 11 changer transitions 3/98 dead transitions. [2022-11-21 17:10:03,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 567 flow [2022-11-21 17:10:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 17:10:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 17:10:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 414 transitions. [2022-11-21 17:10:03,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2022-11-21 17:10:03,157 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 414 transitions. [2022-11-21 17:10:03,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 414 transitions. [2022-11-21 17:10:03,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:03,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 414 transitions. [2022-11-21 17:10:03,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.142857142857146) internal successors, (414), 7 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 17:10:03,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 17:10:03,162 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states 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 17:10:03,162 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 380 flow. Second operand 7 states and 414 transitions. [2022-11-21 17:10:03,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 567 flow [2022-11-21 17:10:03,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 558 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-21 17:10:03,169 INFO L231 Difference]: Finished difference. Result has 98 places, 84 transitions, 417 flow [2022-11-21 17:10:03,170 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=417, PETRI_PLACES=98, PETRI_TRANSITIONS=84} [2022-11-21 17:10:03,171 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2022-11-21 17:10:03,171 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 84 transitions, 417 flow [2022-11-21 17:10:03,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states 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 17:10:03,172 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:03,172 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] [2022-11-21 17:10:03,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 17:10:03,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:03,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:03,174 INFO L85 PathProgramCache]: Analyzing trace with hash -946876456, now seen corresponding path program 1 times [2022-11-21 17:10:03,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:03,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925222019] [2022-11-21 17:10:03,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:03,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:03,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:03,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925222019] [2022-11-21 17:10:03,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925222019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:03,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794625492] [2022-11-21 17:10:03,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:03,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:03,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:03,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:03,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 17:10:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:03,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 17:10:03,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:04,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:04,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794625492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:10:04,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:10:04,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-11-21 17:10:04,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776956514] [2022-11-21 17:10:04,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:10:04,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 17:10:04,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:04,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 17:10:04,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-21 17:10:04,487 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:04,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 84 transitions, 417 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states 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 17:10:04,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:04,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:04,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:07,820 INFO L130 PetriNetUnfolder]: 174/589 cut-off events. [2022-11-21 17:10:07,820 INFO L131 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2022-11-21 17:10:07,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941 conditions, 589 events. 174/589 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3251 event pairs, 4 based on Foata normal form. 24/610 useless extension candidates. Maximal degree in co-relation 1924. Up to 82 conditions per place. [2022-11-21 17:10:07,828 INFO L137 encePairwiseOnDemand]: 65/84 looper letters, 110 selfloop transitions, 150 changer transitions 5/306 dead transitions. [2022-11-21 17:10:07,829 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 306 transitions, 2396 flow [2022-11-21 17:10:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-21 17:10:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-21 17:10:07,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3404 transitions. [2022-11-21 17:10:07,841 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6536098310291859 [2022-11-21 17:10:07,842 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3404 transitions. [2022-11-21 17:10:07,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3404 transitions. [2022-11-21 17:10:07,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:07,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3404 transitions. [2022-11-21 17:10:07,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 54.903225806451616) internal successors, (3404), 62 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states 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 17:10:07,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states 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 17:10:07,870 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states 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 17:10:07,871 INFO L175 Difference]: Start difference. First operand has 98 places, 84 transitions, 417 flow. Second operand 62 states and 3404 transitions. [2022-11-21 17:10:07,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 306 transitions, 2396 flow [2022-11-21 17:10:07,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 306 transitions, 2298 flow, removed 42 selfloop flow, removed 4 redundant places. [2022-11-21 17:10:07,887 INFO L231 Difference]: Finished difference. Result has 179 places, 219 transitions, 1781 flow [2022-11-21 17:10:07,888 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=1781, PETRI_PLACES=179, PETRI_TRANSITIONS=219} [2022-11-21 17:10:07,889 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 105 predicate places. [2022-11-21 17:10:07,889 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 1781 flow [2022-11-21 17:10:07,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states 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 17:10:07,890 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:07,891 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] [2022-11-21 17:10:07,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:08,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:08,099 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:08,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1773717672, now seen corresponding path program 2 times [2022-11-21 17:10:08,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698005456] [2022-11-21 17:10:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:08,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:08,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:08,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698005456] [2022-11-21 17:10:08,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698005456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:08,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493492260] [2022-11-21 17:10:08,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:10:08,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:08,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:08,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:08,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 17:10:08,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:10:08,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:08,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 17:10:08,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:09,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:10:09,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493492260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:09,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:10:09,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-21 17:10:09,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827333234] [2022-11-21 17:10:09,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:09,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 17:10:09,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:09,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 17:10:09,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:10:09,041 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:09,042 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 1781 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:09,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:09,043 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:09,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:09,986 INFO L130 PetriNetUnfolder]: 232/733 cut-off events. [2022-11-21 17:10:09,986 INFO L131 PetriNetUnfolder]: For 4824/4824 co-relation queries the response was YES. [2022-11-21 17:10:09,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 733 events. 232/733 cut-off events. For 4824/4824 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4374 event pairs, 36 based on Foata normal form. 1/723 useless extension candidates. Maximal degree in co-relation 3256. Up to 426 conditions per place. [2022-11-21 17:10:10,000 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 213 selfloop transitions, 72 changer transitions 4/330 dead transitions. [2022-11-21 17:10:10,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 330 transitions, 3461 flow [2022-11-21 17:10:10,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 17:10:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 17:10:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1004 transitions. [2022-11-21 17:10:10,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2022-11-21 17:10:10,008 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1004 transitions. [2022-11-21 17:10:10,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1004 transitions. [2022-11-21 17:10:10,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:10,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1004 transitions. [2022-11-21 17:10:10,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.77777777777778) internal successors, (1004), 18 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 17:10:10,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 17:10:10,021 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 17:10:10,022 INFO L175 Difference]: Start difference. First operand has 179 places, 219 transitions, 1781 flow. Second operand 18 states and 1004 transitions. [2022-11-21 17:10:10,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 330 transitions, 3461 flow [2022-11-21 17:10:10,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 330 transitions, 3111 flow, removed 163 selfloop flow, removed 8 redundant places. [2022-11-21 17:10:10,081 INFO L231 Difference]: Finished difference. Result has 195 places, 281 transitions, 2343 flow [2022-11-21 17:10:10,082 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2343, PETRI_PLACES=195, PETRI_TRANSITIONS=281} [2022-11-21 17:10:10,085 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 121 predicate places. [2022-11-21 17:10:10,085 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 281 transitions, 2343 flow [2022-11-21 17:10:10,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:10,086 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:10,087 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] [2022-11-21 17:10:10,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:10,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:10,298 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1203830056, now seen corresponding path program 3 times [2022-11-21 17:10:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:10,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291535146] [2022-11-21 17:10:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:10,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:10,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:10,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291535146] [2022-11-21 17:10:10,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291535146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:10,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000439679] [2022-11-21 17:10:10,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:10:10,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:10,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:10,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:10,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 17:10:10,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 17:10:10,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 17:10:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:11,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:10:11,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000439679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:11,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:10:11,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-21 17:10:11,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664710197] [2022-11-21 17:10:11,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:11,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 17:10:11,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:11,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 17:10:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:10:11,218 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:11,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 281 transitions, 2343 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:11,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:11,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:11,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:12,318 INFO L130 PetriNetUnfolder]: 312/949 cut-off events. [2022-11-21 17:10:12,319 INFO L131 PetriNetUnfolder]: For 5638/5638 co-relation queries the response was YES. [2022-11-21 17:10:12,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4318 conditions, 949 events. 312/949 cut-off events. For 5638/5638 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6113 event pairs, 41 based on Foata normal form. 1/938 useless extension candidates. Maximal degree in co-relation 4271. Up to 557 conditions per place. [2022-11-21 17:10:12,334 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 271 selfloop transitions, 96 changer transitions 4/412 dead transitions. [2022-11-21 17:10:12,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 412 transitions, 4325 flow [2022-11-21 17:10:12,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:10:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 17:10:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1165 transitions. [2022-11-21 17:10:12,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6604308390022676 [2022-11-21 17:10:12,338 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1165 transitions. [2022-11-21 17:10:12,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1165 transitions. [2022-11-21 17:10:12,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:12,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1165 transitions. [2022-11-21 17:10:12,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.476190476190474) internal successors, (1165), 21 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states 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 17:10:12,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states 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 17:10:12,347 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states 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 17:10:12,347 INFO L175 Difference]: Start difference. First operand has 195 places, 281 transitions, 2343 flow. Second operand 21 states and 1165 transitions. [2022-11-21 17:10:12,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 412 transitions, 4325 flow [2022-11-21 17:10:12,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 412 transitions, 4311 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-21 17:10:12,423 INFO L231 Difference]: Finished difference. Result has 218 places, 357 transitions, 3446 flow [2022-11-21 17:10:12,424 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3446, PETRI_PLACES=218, PETRI_TRANSITIONS=357} [2022-11-21 17:10:12,425 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 144 predicate places. [2022-11-21 17:10:12,425 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 357 transitions, 3446 flow [2022-11-21 17:10:12,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:12,426 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:12,426 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] [2022-11-21 17:10:12,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:12,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:12,640 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:12,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:12,641 INFO L85 PathProgramCache]: Analyzing trace with hash 186380408, now seen corresponding path program 4 times [2022-11-21 17:10:12,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259615258] [2022-11-21 17:10:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:12,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:12,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:12,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259615258] [2022-11-21 17:10:12,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259615258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:12,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:10:12,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-21 17:10:12,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69219084] [2022-11-21 17:10:12,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:12,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 17:10:12,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 17:10:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-21 17:10:12,934 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:12,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 357 transitions, 3446 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states 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 17:10:12,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:12,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:12,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:13,557 INFO L130 PetriNetUnfolder]: 356/1063 cut-off events. [2022-11-21 17:10:13,558 INFO L131 PetriNetUnfolder]: For 7309/7309 co-relation queries the response was YES. [2022-11-21 17:10:13,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5310 conditions, 1063 events. 356/1063 cut-off events. For 7309/7309 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7029 event pairs, 52 based on Foata normal form. 1/1048 useless extension candidates. Maximal degree in co-relation 5254. Up to 550 conditions per place. [2022-11-21 17:10:13,576 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 263 selfloop transitions, 158 changer transitions 6/468 dead transitions. [2022-11-21 17:10:13,576 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 468 transitions, 5513 flow [2022-11-21 17:10:13,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 17:10:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-21 17:10:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-11-21 17:10:13,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-11-21 17:10:13,579 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-11-21 17:10:13,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-11-21 17:10:13,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:13,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-11-21 17:10:13,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states 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 17:10:13,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 17:10:13,624 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states 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 17:10:13,624 INFO L175 Difference]: Start difference. First operand has 218 places, 357 transitions, 3446 flow. Second operand 15 states and 824 transitions. [2022-11-21 17:10:13,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 468 transitions, 5513 flow [2022-11-21 17:10:13,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 468 transitions, 5399 flow, removed 42 selfloop flow, removed 7 redundant places. [2022-11-21 17:10:13,734 INFO L231 Difference]: Finished difference. Result has 234 places, 433 transitions, 4871 flow [2022-11-21 17:10:13,735 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4871, PETRI_PLACES=234, PETRI_TRANSITIONS=433} [2022-11-21 17:10:13,736 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 160 predicate places. [2022-11-21 17:10:13,736 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 433 transitions, 4871 flow [2022-11-21 17:10:13,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states 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 17:10:13,737 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:13,738 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] [2022-11-21 17:10:13,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 17:10:13,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1350271786, now seen corresponding path program 5 times [2022-11-21 17:10:13,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:13,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229008478] [2022-11-21 17:10:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:13,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:14,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:14,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229008478] [2022-11-21 17:10:14,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229008478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:14,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641333566] [2022-11-21 17:10:14,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 17:10:14,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:14,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:14,054 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:14,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 17:10:14,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-21 17:10:14,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:14,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 17:10:14,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:14,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:14,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641333566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:10:14,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:10:14,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-11-21 17:10:14,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134356166] [2022-11-21 17:10:14,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:10:14,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 17:10:14,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:14,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 17:10:14,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:10:14,803 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:14,805 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 433 transitions, 4871 flow. Second operand has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states 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 17:10:14,805 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:14,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:14,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:15,908 INFO L130 PetriNetUnfolder]: 493/1394 cut-off events. [2022-11-21 17:10:15,908 INFO L131 PetriNetUnfolder]: For 10884/10884 co-relation queries the response was YES. [2022-11-21 17:10:15,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7692 conditions, 1394 events. 493/1394 cut-off events. For 10884/10884 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9767 event pairs, 34 based on Foata normal form. 1/1383 useless extension candidates. Maximal degree in co-relation 7626. Up to 444 conditions per place. [2022-11-21 17:10:15,930 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 202 selfloop transitions, 442 changer transitions 22/707 dead transitions. [2022-11-21 17:10:15,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 707 transitions, 9305 flow [2022-11-21 17:10:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 17:10:15,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-21 17:10:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1522 transitions. [2022-11-21 17:10:15,979 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6471088435374149 [2022-11-21 17:10:15,980 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1522 transitions. [2022-11-21 17:10:15,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1522 transitions. [2022-11-21 17:10:15,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:15,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1522 transitions. [2022-11-21 17:10:15,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.357142857142854) internal successors, (1522), 28 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states 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 17:10:15,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 17:10:15,989 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 17:10:15,989 INFO L175 Difference]: Start difference. First operand has 234 places, 433 transitions, 4871 flow. Second operand 28 states and 1522 transitions. [2022-11-21 17:10:15,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 707 transitions, 9305 flow [2022-11-21 17:10:16,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 707 transitions, 9131 flow, removed 87 selfloop flow, removed 3 redundant places. [2022-11-21 17:10:16,135 INFO L231 Difference]: Finished difference. Result has 270 places, 636 transitions, 8547 flow [2022-11-21 17:10:16,135 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4755, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8547, PETRI_PLACES=270, PETRI_TRANSITIONS=636} [2022-11-21 17:10:16,136 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 196 predicate places. [2022-11-21 17:10:16,136 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 636 transitions, 8547 flow [2022-11-21 17:10:16,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states 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 17:10:16,137 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:16,137 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] [2022-11-21 17:10:16,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:16,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 17:10:16,345 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:16,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:16,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1996851174, now seen corresponding path program 6 times [2022-11-21 17:10:16,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:16,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318396955] [2022-11-21 17:10:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:16,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:16,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:16,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:16,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318396955] [2022-11-21 17:10:16,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318396955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:16,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398423895] [2022-11-21 17:10:16,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 17:10:16,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:16,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:16,619 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:16,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 17:10:16,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-21 17:10:16,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 17:10:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:17,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:10:17,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398423895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:17,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:10:17,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-21 17:10:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817608366] [2022-11-21 17:10:17,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:17,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 17:10:17,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 17:10:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:10:17,131 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:17,132 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 636 transitions, 8547 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:17,132 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:17,132 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:17,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:18,687 INFO L130 PetriNetUnfolder]: 648/1770 cut-off events. [2022-11-21 17:10:18,688 INFO L131 PetriNetUnfolder]: For 17440/17440 co-relation queries the response was YES. [2022-11-21 17:10:18,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11260 conditions, 1770 events. 648/1770 cut-off events. For 17440/17440 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13008 event pairs, 57 based on Foata normal form. 1/1750 useless extension candidates. Maximal degree in co-relation 11181. Up to 1097 conditions per place. [2022-11-21 17:10:18,732 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 669 selfloop transitions, 170 changer transitions 4/884 dead transitions. [2022-11-21 17:10:18,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 884 transitions, 14042 flow [2022-11-21 17:10:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 17:10:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-21 17:10:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-11-21 17:10:18,739 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-11-21 17:10:18,740 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-11-21 17:10:18,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-11-21 17:10:18,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:18,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-11-21 17:10:18,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states 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 17:10:18,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 17:10:18,750 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states 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 17:10:18,751 INFO L175 Difference]: Start difference. First operand has 270 places, 636 transitions, 8547 flow. Second operand 16 states and 910 transitions. [2022-11-21 17:10:18,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 884 transitions, 14042 flow [2022-11-21 17:10:19,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 884 transitions, 12889 flow, removed 171 selfloop flow, removed 17 redundant places. [2022-11-21 17:10:19,052 INFO L231 Difference]: Finished difference. Result has 268 places, 775 transitions, 10616 flow [2022-11-21 17:10:19,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10616, PETRI_PLACES=268, PETRI_TRANSITIONS=775} [2022-11-21 17:10:19,054 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 194 predicate places. [2022-11-21 17:10:19,054 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 775 transitions, 10616 flow [2022-11-21 17:10:19,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:19,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:19,055 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] [2022-11-21 17:10:19,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-21 17:10:19,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 17:10:19,263 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1099232000, now seen corresponding path program 7 times [2022-11-21 17:10:19,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:19,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600103630] [2022-11-21 17:10:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:19,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:19,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:19,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600103630] [2022-11-21 17:10:19,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600103630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:19,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753384443] [2022-11-21 17:10:19,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 17:10:19,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:19,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:19,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:19,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 17:10:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 17:10:19,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:20,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:10:20,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753384443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:20,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:10:20,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-21 17:10:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961234522] [2022-11-21 17:10:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:20,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 17:10:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 17:10:20,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:10:20,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:20,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 775 transitions, 10616 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:20,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:20,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:20,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:21,607 INFO L130 PetriNetUnfolder]: 754/2051 cut-off events. [2022-11-21 17:10:21,607 INFO L131 PetriNetUnfolder]: For 19063/19063 co-relation queries the response was YES. [2022-11-21 17:10:21,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12880 conditions, 2051 events. 754/2051 cut-off events. For 19063/19063 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15800 event pairs, 82 based on Foata normal form. 1/2025 useless extension candidates. Maximal degree in co-relation 12799. Up to 1421 conditions per place. [2022-11-21 17:10:21,635 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 754 selfloop transitions, 147 changer transitions 4/946 dead transitions. [2022-11-21 17:10:21,636 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 946 transitions, 14840 flow [2022-11-21 17:10:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 17:10:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 17:10:21,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2022-11-21 17:10:21,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2022-11-21 17:10:21,639 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2022-11-21 17:10:21,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2022-11-21 17:10:21,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:21,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2022-11-21 17:10:21,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states 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 17:10:21,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 17:10:21,646 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 17:10:21,646 INFO L175 Difference]: Start difference. First operand has 268 places, 775 transitions, 10616 flow. Second operand 18 states and 1006 transitions. [2022-11-21 17:10:21,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 946 transitions, 14840 flow [2022-11-21 17:10:21,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 946 transitions, 14537 flow, removed 133 selfloop flow, removed 7 redundant places. [2022-11-21 17:10:21,879 INFO L231 Difference]: Finished difference. Result has 285 places, 885 transitions, 12648 flow [2022-11-21 17:10:21,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10343, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12648, PETRI_PLACES=285, PETRI_TRANSITIONS=885} [2022-11-21 17:10:21,880 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 211 predicate places. [2022-11-21 17:10:21,881 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 885 transitions, 12648 flow [2022-11-21 17:10:21,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:21,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:21,881 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] [2022-11-21 17:10:21,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:22,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 17:10:22,083 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:22,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1566346522, now seen corresponding path program 8 times [2022-11-21 17:10:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:22,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063124190] [2022-11-21 17:10:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:22,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:22,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:22,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063124190] [2022-11-21 17:10:22,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063124190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:22,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591376140] [2022-11-21 17:10:22,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:10:22,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:22,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:22,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:22,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 17:10:22,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:10:22,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:22,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 17:10:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:22,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 17:10:22,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591376140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:10:22,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 17:10:22,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-21 17:10:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688290074] [2022-11-21 17:10:22,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:10:22,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-21 17:10:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-21 17:10:22,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-21 17:10:22,943 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:22,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 885 transitions, 12648 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:22,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:22,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:22,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:24,739 INFO L130 PetriNetUnfolder]: 863/2328 cut-off events. [2022-11-21 17:10:24,739 INFO L131 PetriNetUnfolder]: For 23712/23712 co-relation queries the response was YES. [2022-11-21 17:10:24,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15320 conditions, 2328 events. 863/2328 cut-off events. For 23712/23712 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18529 event pairs, 87 based on Foata normal form. 1/2295 useless extension candidates. Maximal degree in co-relation 15232. Up to 1642 conditions per place. [2022-11-21 17:10:24,769 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 852 selfloop transitions, 169 changer transitions 4/1066 dead transitions. [2022-11-21 17:10:24,769 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1066 transitions, 17666 flow [2022-11-21 17:10:24,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-21 17:10:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-21 17:10:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1163 transitions. [2022-11-21 17:10:24,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.659297052154195 [2022-11-21 17:10:24,774 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1163 transitions. [2022-11-21 17:10:24,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1163 transitions. [2022-11-21 17:10:24,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:24,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1163 transitions. [2022-11-21 17:10:24,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states 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 17:10:24,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states 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 17:10:24,782 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states 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 17:10:24,783 INFO L175 Difference]: Start difference. First operand has 285 places, 885 transitions, 12648 flow. Second operand 21 states and 1163 transitions. [2022-11-21 17:10:24,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1066 transitions, 17666 flow [2022-11-21 17:10:25,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1066 transitions, 17236 flow, removed 185 selfloop flow, removed 8 redundant places. [2022-11-21 17:10:25,046 INFO L231 Difference]: Finished difference. Result has 305 places, 1005 transitions, 15083 flow [2022-11-21 17:10:25,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12272, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15083, PETRI_PLACES=305, PETRI_TRANSITIONS=1005} [2022-11-21 17:10:25,047 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 231 predicate places. [2022-11-21 17:10:25,047 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1005 transitions, 15083 flow [2022-11-21 17:10:25,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states 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 17:10:25,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:25,048 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:25,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:25,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 17:10:25,249 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash -613700161, now seen corresponding path program 9 times [2022-11-21 17:10:25,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:25,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040645787] [2022-11-21 17:10:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:25,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:25,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:25,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040645787] [2022-11-21 17:10:25,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040645787] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:25,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677816157] [2022-11-21 17:10:25,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:10:25,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:25,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:25,470 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:25,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 17:10:25,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 17:10:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:25,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:10:25,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:25,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:26,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677816157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:10:26,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:10:26,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-21 17:10:26,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999892740] [2022-11-21 17:10:26,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:10:26,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 17:10:26,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:26,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 17:10:26,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:10:26,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:26,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1005 transitions, 15083 flow. Second operand has 20 states, 20 states have (on average 53.8) internal successors, (1076), 20 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states 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 17:10:26,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:26,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:26,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:28,156 INFO L130 PetriNetUnfolder]: 1033/2762 cut-off events. [2022-11-21 17:10:28,156 INFO L131 PetriNetUnfolder]: For 30374/30388 co-relation queries the response was YES. [2022-11-21 17:10:28,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18380 conditions, 2762 events. 1033/2762 cut-off events. For 30374/30388 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22873 event pairs, 43 based on Foata normal form. 14/2758 useless extension candidates. Maximal degree in co-relation 18283. Up to 903 conditions per place. [2022-11-21 17:10:28,196 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 791 selfloop transitions, 455 changer transitions 0/1287 dead transitions. [2022-11-21 17:10:28,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1287 transitions, 21280 flow [2022-11-21 17:10:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-21 17:10:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-21 17:10:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1127 transitions. [2022-11-21 17:10:28,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2022-11-21 17:10:28,200 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1127 transitions. [2022-11-21 17:10:28,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1127 transitions. [2022-11-21 17:10:28,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:28,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1127 transitions. [2022-11-21 17:10:28,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 56.35) internal successors, (1127), 20 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states 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 17:10:28,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states 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 17:10:28,209 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states 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 17:10:28,209 INFO L175 Difference]: Start difference. First operand has 305 places, 1005 transitions, 15083 flow. Second operand 20 states and 1127 transitions. [2022-11-21 17:10:28,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1287 transitions, 21280 flow [2022-11-21 17:10:28,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1287 transitions, 20662 flow, removed 291 selfloop flow, removed 7 redundant places. [2022-11-21 17:10:28,684 INFO L231 Difference]: Finished difference. Result has 326 places, 1163 transitions, 18690 flow [2022-11-21 17:10:28,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=14473, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18690, PETRI_PLACES=326, PETRI_TRANSITIONS=1163} [2022-11-21 17:10:28,686 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 252 predicate places. [2022-11-21 17:10:28,686 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1163 transitions, 18690 flow [2022-11-21 17:10:28,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.8) internal successors, (1076), 20 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states 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 17:10:28,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:28,688 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:28,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:28,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 17:10:28,894 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:28,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1312073183, now seen corresponding path program 10 times [2022-11-21 17:10:28,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:28,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934470632] [2022-11-21 17:10:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:28,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:29,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:29,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934470632] [2022-11-21 17:10:29,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934470632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393598975] [2022-11-21 17:10:29,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:10:29,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:29,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:29,097 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:29,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 17:10:29,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:10:29,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:29,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 17:10:29,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:29,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:29,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393598975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:10:29,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:10:29,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-21 17:10:29,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479533417] [2022-11-21 17:10:29,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:10:29,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-21 17:10:29,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:29,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-21 17:10:29,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-21 17:10:29,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:29,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1163 transitions, 18690 flow. Second operand has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states 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 17:10:29,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:29,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:29,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:31,690 INFO L130 PetriNetUnfolder]: 1107/2942 cut-off events. [2022-11-21 17:10:31,690 INFO L131 PetriNetUnfolder]: For 42498/42498 co-relation queries the response was YES. [2022-11-21 17:10:31,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 2942 events. 1107/2942 cut-off events. For 42498/42498 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24629 event pairs, 71 based on Foata normal form. 2/2911 useless extension candidates. Maximal degree in co-relation 21261. Up to 1612 conditions per place. [2022-11-21 17:10:31,749 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 930 selfloop transitions, 362 changer transitions 12/1345 dead transitions. [2022-11-21 17:10:31,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1345 transitions, 23894 flow [2022-11-21 17:10:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 17:10:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 17:10:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1004 transitions. [2022-11-21 17:10:31,752 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2022-11-21 17:10:31,753 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1004 transitions. [2022-11-21 17:10:31,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1004 transitions. [2022-11-21 17:10:31,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:31,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1004 transitions. [2022-11-21 17:10:31,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.77777777777778) internal successors, (1004), 18 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states 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 17:10:31,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 17:10:31,760 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 17:10:31,760 INFO L175 Difference]: Start difference. First operand has 326 places, 1163 transitions, 18690 flow. Second operand 18 states and 1004 transitions. [2022-11-21 17:10:31,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1345 transitions, 23894 flow [2022-11-21 17:10:32,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1345 transitions, 23544 flow, removed 157 selfloop flow, removed 6 redundant places. [2022-11-21 17:10:32,648 INFO L231 Difference]: Finished difference. Result has 344 places, 1238 transitions, 21062 flow [2022-11-21 17:10:32,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=18344, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21062, PETRI_PLACES=344, PETRI_TRANSITIONS=1238} [2022-11-21 17:10:32,650 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 270 predicate places. [2022-11-21 17:10:32,650 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1238 transitions, 21062 flow [2022-11-21 17:10:32,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states 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 17:10:32,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:32,651 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:32,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:32,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-21 17:10:32,851 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:32,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:32,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1339676861, now seen corresponding path program 11 times [2022-11-21 17:10:32,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:32,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020522640] [2022-11-21 17:10:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:32,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:33,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:33,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020522640] [2022-11-21 17:10:33,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020522640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:33,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020073643] [2022-11-21 17:10:33,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 17:10:33,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:33,021 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:33,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 17:10:33,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:10:33,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:33,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:10:33,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:33,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:33,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020073643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:10:33,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:10:33,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-21 17:10:33,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482480012] [2022-11-21 17:10:33,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:10:33,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 17:10:33,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:33,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 17:10:33,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-21 17:10:33,655 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:33,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1238 transitions, 21062 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states 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 17:10:33,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:33,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:33,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:37,209 INFO L130 PetriNetUnfolder]: 1477/3889 cut-off events. [2022-11-21 17:10:37,210 INFO L131 PetriNetUnfolder]: For 72823/72823 co-relation queries the response was YES. [2022-11-21 17:10:37,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30669 conditions, 3889 events. 1477/3889 cut-off events. For 72823/72823 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33593 event pairs, 64 based on Foata normal form. 14/3876 useless extension candidates. Maximal degree in co-relation 30556. Up to 992 conditions per place. [2022-11-21 17:10:37,286 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 709 selfloop transitions, 1069 changer transitions 26/1845 dead transitions. [2022-11-21 17:10:37,286 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1845 transitions, 35908 flow [2022-11-21 17:10:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 17:10:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-21 17:10:37,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2165 transitions. [2022-11-21 17:10:37,292 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6608669108669109 [2022-11-21 17:10:37,292 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2165 transitions. [2022-11-21 17:10:37,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2165 transitions. [2022-11-21 17:10:37,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:37,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2165 transitions. [2022-11-21 17:10:37,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.51282051282051) internal successors, (2165), 39 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states 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 17:10:37,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 17:10:37,308 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 17:10:37,308 INFO L175 Difference]: Start difference. First operand has 344 places, 1238 transitions, 21062 flow. Second operand 39 states and 2165 transitions. [2022-11-21 17:10:37,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1845 transitions, 35908 flow [2022-11-21 17:10:38,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1845 transitions, 35490 flow, removed 72 selfloop flow, removed 13 redundant places. [2022-11-21 17:10:38,402 INFO L231 Difference]: Finished difference. Result has 392 places, 1662 transitions, 33601 flow [2022-11-21 17:10:38,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20683, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=675, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=33601, PETRI_PLACES=392, PETRI_TRANSITIONS=1662} [2022-11-21 17:10:38,403 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 318 predicate places. [2022-11-21 17:10:38,403 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1662 transitions, 33601 flow [2022-11-21 17:10:38,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states 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 17:10:38,404 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:38,404 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:38,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-21 17:10:38,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:38,610 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:38,610 INFO L85 PathProgramCache]: Analyzing trace with hash 923816933, now seen corresponding path program 12 times [2022-11-21 17:10:38,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:38,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803858588] [2022-11-21 17:10:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:38,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:38,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803858588] [2022-11-21 17:10:38,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803858588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241535264] [2022-11-21 17:10:38,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 17:10:38,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:38,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:38,785 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:38,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 17:10:38,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 17:10:38,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:38,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:10:38,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:39,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:39,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241535264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:10:39,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:10:39,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-21 17:10:39,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045134653] [2022-11-21 17:10:39,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:10:39,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 17:10:39,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:39,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 17:10:39,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-21 17:10:39,345 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:39,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1662 transitions, 33601 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states 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 17:10:39,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:39,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:39,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:45,151 INFO L130 PetriNetUnfolder]: 1926/5203 cut-off events. [2022-11-21 17:10:45,151 INFO L131 PetriNetUnfolder]: For 120334/120363 co-relation queries the response was YES. [2022-11-21 17:10:45,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45199 conditions, 5203 events. 1926/5203 cut-off events. For 120334/120363 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 47303 event pairs, 27 based on Foata normal form. 43/5240 useless extension candidates. Maximal degree in co-relation 45066. Up to 1189 conditions per place. [2022-11-21 17:10:45,238 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 1139 selfloop transitions, 1224 changer transitions 2/2406 dead transitions. [2022-11-21 17:10:45,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 2406 transitions, 53111 flow [2022-11-21 17:10:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-21 17:10:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-21 17:10:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3928 transitions. [2022-11-21 17:10:45,246 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6586183769282361 [2022-11-21 17:10:45,246 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3928 transitions. [2022-11-21 17:10:45,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3928 transitions. [2022-11-21 17:10:45,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:45,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3928 transitions. [2022-11-21 17:10:45,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 55.32394366197183) internal successors, (3928), 71 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states 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 17:10:45,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 17:10:45,266 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 17:10:45,267 INFO L175 Difference]: Start difference. First operand has 392 places, 1662 transitions, 33601 flow. Second operand 71 states and 3928 transitions. [2022-11-21 17:10:45,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 2406 transitions, 53111 flow [2022-11-21 17:10:47,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2406 transitions, 51897 flow, removed 587 selfloop flow, removed 8 redundant places. [2022-11-21 17:10:47,444 INFO L231 Difference]: Finished difference. Result has 488 places, 2225 transitions, 49344 flow [2022-11-21 17:10:47,446 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=32691, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=751, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=49344, PETRI_PLACES=488, PETRI_TRANSITIONS=2225} [2022-11-21 17:10:47,447 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 414 predicate places. [2022-11-21 17:10:47,447 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 2225 transitions, 49344 flow [2022-11-21 17:10:47,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states 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 17:10:47,448 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:47,448 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:47,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:47,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 17:10:47,654 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1222382439, now seen corresponding path program 13 times [2022-11-21 17:10:47,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:47,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120766148] [2022-11-21 17:10:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:47,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120766148] [2022-11-21 17:10:47,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120766148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:47,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990412024] [2022-11-21 17:10:47,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 17:10:47,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:47,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:47,843 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:47,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 17:10:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:47,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 17:10:47,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:10:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:48,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:10:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:48,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990412024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:10:48,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:10:48,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-21 17:10:48,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81001813] [2022-11-21 17:10:48,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:10:48,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 17:10:48,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:10:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 17:10:48,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-11-21 17:10:48,471 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:10:48,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 2225 transitions, 49344 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states 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 17:10:48,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:10:48,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:10:48,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:10:56,021 INFO L130 PetriNetUnfolder]: 2100/5423 cut-off events. [2022-11-21 17:10:56,021 INFO L131 PetriNetUnfolder]: For 142409/142428 co-relation queries the response was YES. [2022-11-21 17:10:56,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51953 conditions, 5423 events. 2100/5423 cut-off events. For 142409/142428 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 48815 event pairs, 87 based on Foata normal form. 10/5384 useless extension candidates. Maximal degree in co-relation 51787. Up to 1624 conditions per place. [2022-11-21 17:10:56,117 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 1302 selfloop transitions, 1264 changer transitions 5/2612 dead transitions. [2022-11-21 17:10:56,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2612 transitions, 63217 flow [2022-11-21 17:10:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 17:10:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-21 17:10:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2179 transitions. [2022-11-21 17:10:56,122 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6651404151404151 [2022-11-21 17:10:56,123 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2179 transitions. [2022-11-21 17:10:56,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2179 transitions. [2022-11-21 17:10:56,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:10:56,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2179 transitions. [2022-11-21 17:10:56,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.87179487179487) internal successors, (2179), 39 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states 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 17:10:56,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 17:10:56,137 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states 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 17:10:56,137 INFO L175 Difference]: Start difference. First operand has 488 places, 2225 transitions, 49344 flow. Second operand 39 states and 2179 transitions. [2022-11-21 17:10:56,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2612 transitions, 63217 flow [2022-11-21 17:10:59,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 2612 transitions, 60102 flow, removed 1491 selfloop flow, removed 10 redundant places. [2022-11-21 17:10:59,281 INFO L231 Difference]: Finished difference. Result has 522 places, 2405 transitions, 55186 flow [2022-11-21 17:10:59,283 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=46126, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=55186, PETRI_PLACES=522, PETRI_TRANSITIONS=2405} [2022-11-21 17:10:59,284 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 448 predicate places. [2022-11-21 17:10:59,284 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 2405 transitions, 55186 flow [2022-11-21 17:10:59,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states 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 17:10:59,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:10:59,285 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:10:59,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 17:10:59,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:59,493 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:10:59,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:10:59,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1066815339, now seen corresponding path program 14 times [2022-11-21 17:10:59,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:10:59,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616766282] [2022-11-21 17:10:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:10:59,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:10:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:10:59,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:10:59,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:10:59,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616766282] [2022-11-21 17:10:59,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616766282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:10:59,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221321853] [2022-11-21 17:10:59,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:10:59,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:10:59,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:10:59,673 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:10:59,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 17:10:59,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:10:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:10:59,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:10:59,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:11:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:00,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:11:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:00,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221321853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:11:00,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:11:00,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-21 17:11:00,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245664069] [2022-11-21 17:11:00,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:11:00,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 17:11:00,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:11:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 17:11:00,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-21 17:11:00,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:11:00,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 2405 transitions, 55186 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states 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 17:11:00,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:11:00,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:11:00,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:11:08,238 INFO L130 PetriNetUnfolder]: 2373/6325 cut-off events. [2022-11-21 17:11:08,239 INFO L131 PetriNetUnfolder]: For 178048/178077 co-relation queries the response was YES. [2022-11-21 17:11:08,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60599 conditions, 6325 events. 2373/6325 cut-off events. For 178048/178077 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 59636 event pairs, 37 based on Foata normal form. 42/6361 useless extension candidates. Maximal degree in co-relation 60428. Up to 1851 conditions per place. [2022-11-21 17:11:08,345 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 1531 selfloop transitions, 1332 changer transitions 0/2904 dead transitions. [2022-11-21 17:11:08,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 2904 transitions, 72786 flow [2022-11-21 17:11:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-21 17:11:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-21 17:11:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3085 transitions. [2022-11-21 17:11:08,350 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6558248299319728 [2022-11-21 17:11:08,350 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3085 transitions. [2022-11-21 17:11:08,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3085 transitions. [2022-11-21 17:11:08,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:11:08,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3085 transitions. [2022-11-21 17:11:08,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 55.089285714285715) internal successors, (3085), 56 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states 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 17:11:08,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states 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 17:11:08,366 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states 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 17:11:08,366 INFO L175 Difference]: Start difference. First operand has 522 places, 2405 transitions, 55186 flow. Second operand 56 states and 3085 transitions. [2022-11-21 17:11:08,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 2904 transitions, 72786 flow [2022-11-21 17:11:11,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2904 transitions, 71657 flow, removed 199 selfloop flow, removed 20 redundant places. [2022-11-21 17:11:11,791 INFO L231 Difference]: Finished difference. Result has 583 places, 2750 transitions, 67980 flow [2022-11-21 17:11:11,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=54114, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=67980, PETRI_PLACES=583, PETRI_TRANSITIONS=2750} [2022-11-21 17:11:11,793 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 509 predicate places. [2022-11-21 17:11:11,793 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2750 transitions, 67980 flow [2022-11-21 17:11:11,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states 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 17:11:11,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:11:11,794 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:11:11,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 17:11:11,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:12,000 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:11:12,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:11:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1696804425, now seen corresponding path program 15 times [2022-11-21 17:11:12,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:11:12,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339004063] [2022-11-21 17:11:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:11:12,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:11:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:11:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:12,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:11:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339004063] [2022-11-21 17:11:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339004063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:11:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338826687] [2022-11-21 17:11:12,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:11:12,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:12,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:11:12,166 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:11:12,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 17:11:12,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-21 17:11:12,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:11:12,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:11:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:11:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:12,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:11:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:12,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338826687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:11:12,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:11:12,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-21 17:11:12,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054326523] [2022-11-21 17:11:12,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:11:12,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 17:11:12,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:11:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 17:11:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:11:12,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:11:12,705 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2750 transitions, 67980 flow. Second operand has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 17:11:12,705 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:11:12,705 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:11:12,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:11:23,176 INFO L130 PetriNetUnfolder]: 2586/7042 cut-off events. [2022-11-21 17:11:23,176 INFO L131 PetriNetUnfolder]: For 238413/238432 co-relation queries the response was YES. [2022-11-21 17:11:23,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71889 conditions, 7042 events. 2586/7042 cut-off events. For 238413/238432 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 68479 event pairs, 208 based on Foata normal form. 38/6990 useless extension candidates. Maximal degree in co-relation 71692. Up to 2875 conditions per place. [2022-11-21 17:11:23,326 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2029 selfloop transitions, 1164 changer transitions 2/3236 dead transitions. [2022-11-21 17:11:23,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 3236 transitions, 86224 flow [2022-11-21 17:11:23,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-21 17:11:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-21 17:11:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2331 transitions. [2022-11-21 17:11:23,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2022-11-21 17:11:23,331 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2331 transitions. [2022-11-21 17:11:23,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2331 transitions. [2022-11-21 17:11:23,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:11:23,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2331 transitions. [2022-11-21 17:11:23,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.5) internal successors, (2331), 42 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states 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 17:11:23,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states 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 17:11:23,345 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states 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 17:11:23,345 INFO L175 Difference]: Start difference. First operand has 583 places, 2750 transitions, 67980 flow. Second operand 42 states and 2331 transitions. [2022-11-21 17:11:23,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 3236 transitions, 86224 flow [2022-11-21 17:11:28,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 3236 transitions, 83117 flow, removed 981 selfloop flow, removed 12 redundant places. [2022-11-21 17:11:28,529 INFO L231 Difference]: Finished difference. Result has 635 places, 3110 transitions, 78635 flow [2022-11-21 17:11:28,531 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=65021, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=858, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=78635, PETRI_PLACES=635, PETRI_TRANSITIONS=3110} [2022-11-21 17:11:28,532 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 561 predicate places. [2022-11-21 17:11:28,532 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 3110 transitions, 78635 flow [2022-11-21 17:11:28,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 17:11:28,533 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:11:28,533 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:11:28,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 17:11:28,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:28,739 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:11:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:11:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash 770996869, now seen corresponding path program 16 times [2022-11-21 17:11:28,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:11:28,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421197157] [2022-11-21 17:11:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:11:28,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:11:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:11:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:28,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:11:28,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421197157] [2022-11-21 17:11:28,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421197157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:11:28,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493212803] [2022-11-21 17:11:28,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 17:11:28,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:28,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:11:28,951 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:11:28,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 17:11:29,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 17:11:29,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:11:29,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 17:11:29,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:11:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:29,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:11:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:29,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493212803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:11:29,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:11:29,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-21 17:11:29,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725054168] [2022-11-21 17:11:29,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:11:29,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-21 17:11:29,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:11:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-21 17:11:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-21 17:11:29,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:11:29,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 3110 transitions, 78635 flow. Second operand has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 17:11:29,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:11:29,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:11:29,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:11:42,589 INFO L130 PetriNetUnfolder]: 3078/8114 cut-off events. [2022-11-21 17:11:42,589 INFO L131 PetriNetUnfolder]: For 309718/309747 co-relation queries the response was YES. [2022-11-21 17:11:42,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88078 conditions, 8114 events. 3078/8114 cut-off events. For 309718/309747 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 79452 event pairs, 213 based on Foata normal form. 22/8046 useless extension candidates. Maximal degree in co-relation 87860. Up to 4263 conditions per place. [2022-11-21 17:11:42,812 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 2646 selfloop transitions, 1234 changer transitions 35/3956 dead transitions. [2022-11-21 17:11:42,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 3956 transitions, 110526 flow [2022-11-21 17:11:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-21 17:11:42,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-21 17:11:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2213 transitions. [2022-11-21 17:11:42,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6586309523809524 [2022-11-21 17:11:42,816 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2213 transitions. [2022-11-21 17:11:42,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2213 transitions. [2022-11-21 17:11:42,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:11:42,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2213 transitions. [2022-11-21 17:11:42,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.325) internal successors, (2213), 40 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states 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 17:11:42,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states 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 17:11:42,825 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states 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 17:11:42,825 INFO L175 Difference]: Start difference. First operand has 635 places, 3110 transitions, 78635 flow. Second operand 40 states and 2213 transitions. [2022-11-21 17:11:42,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 3956 transitions, 110526 flow [2022-11-21 17:11:50,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 3956 transitions, 107464 flow, removed 1013 selfloop flow, removed 9 redundant places. [2022-11-21 17:11:50,294 INFO L231 Difference]: Finished difference. Result has 687 places, 3611 transitions, 95082 flow [2022-11-21 17:11:50,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=76222, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=95082, PETRI_PLACES=687, PETRI_TRANSITIONS=3611} [2022-11-21 17:11:50,296 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 613 predicate places. [2022-11-21 17:11:50,296 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 3611 transitions, 95082 flow [2022-11-21 17:11:50,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states 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 17:11:50,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:11:50,297 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:11:50,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 17:11:50,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:50,498 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:11:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:11:50,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1814685321, now seen corresponding path program 17 times [2022-11-21 17:11:50,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:11:50,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203303034] [2022-11-21 17:11:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:11:50,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:11:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:11:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:50,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:11:50,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203303034] [2022-11-21 17:11:50,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203303034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:11:50,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373663324] [2022-11-21 17:11:50,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 17:11:50,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:11:50,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:11:50,677 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:11:50,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 17:11:50,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-21 17:11:50,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:11:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 17:11:50,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:11:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:51,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:11:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:11:51,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373663324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:11:51,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:11:51,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 27 [2022-11-21 17:11:51,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114251303] [2022-11-21 17:11:51,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:11:51,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 17:11:51,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:11:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 17:11:51,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-21 17:11:51,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:11:51,394 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 3611 transitions, 95082 flow. Second operand has 27 states, 27 states have (on average 53.592592592592595) internal successors, (1447), 27 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states 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 17:11:51,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:11:51,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:11:51,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:12:09,208 INFO L130 PetriNetUnfolder]: 3266/8672 cut-off events. [2022-11-21 17:12:09,208 INFO L131 PetriNetUnfolder]: For 369914/369949 co-relation queries the response was YES. [2022-11-21 17:12:09,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97488 conditions, 8672 events. 3266/8672 cut-off events. For 369914/369949 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 86199 event pairs, 10 based on Foata normal form. 74/8744 useless extension candidates. Maximal degree in co-relation 97250. Up to 1563 conditions per place. [2022-11-21 17:12:09,448 INFO L137 encePairwiseOnDemand]: 64/84 looper letters, 205 selfloop transitions, 3539 changer transitions 364/4149 dead transitions. [2022-11-21 17:12:09,448 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 4149 transitions, 119426 flow [2022-11-21 17:12:09,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-21 17:12:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-21 17:12:09,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3830 transitions. [2022-11-21 17:12:09,455 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.642186452045607 [2022-11-21 17:12:09,455 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3830 transitions. [2022-11-21 17:12:09,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3830 transitions. [2022-11-21 17:12:09,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:12:09,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3830 transitions. [2022-11-21 17:12:09,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 53.943661971830984) internal successors, (3830), 71 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states 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 17:12:09,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 17:12:09,473 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states 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 17:12:09,473 INFO L175 Difference]: Start difference. First operand has 687 places, 3611 transitions, 95082 flow. Second operand 71 states and 3830 transitions. [2022-11-21 17:12:09,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 4149 transitions, 119426 flow [2022-11-21 17:12:18,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 4149 transitions, 116682 flow, removed 1029 selfloop flow, removed 18 redundant places. [2022-11-21 17:12:18,851 INFO L231 Difference]: Finished difference. Result has 753 places, 3754 transitions, 108291 flow [2022-11-21 17:12:18,853 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=92150, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3099, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=108291, PETRI_PLACES=753, PETRI_TRANSITIONS=3754} [2022-11-21 17:12:18,854 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 679 predicate places. [2022-11-21 17:12:18,854 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 3754 transitions, 108291 flow [2022-11-21 17:12:18,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.592592592592595) internal successors, (1447), 27 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states 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 17:12:18,854 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:12:18,854 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:18,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 17:12:19,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:12:19,055 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:12:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:19,056 INFO L85 PathProgramCache]: Analyzing trace with hash 814750091, now seen corresponding path program 18 times [2022-11-21 17:12:19,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:19,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563537257] [2022-11-21 17:12:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:19,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:19,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:19,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563537257] [2022-11-21 17:12:19,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563537257] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:12:19,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163339010] [2022-11-21 17:12:19,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 17:12:19,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:12:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:12:19,247 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:12:19,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 17:12:19,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-21 17:12:19,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:12:19,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:12:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:12:19,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:19,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:12:19,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:19,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163339010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:12:19,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:12:19,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-21 17:12:19,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324603775] [2022-11-21 17:12:19,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:12:19,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 17:12:19,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:19,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 17:12:19,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-21 17:12:19,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:12:19,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 3754 transitions, 108291 flow. Second operand has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states 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 17:12:19,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:12:19,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:12:19,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:12:35,699 INFO L130 PetriNetUnfolder]: 3140/7583 cut-off events. [2022-11-21 17:12:35,699 INFO L131 PetriNetUnfolder]: For 359610/359645 co-relation queries the response was YES. [2022-11-21 17:12:35,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98078 conditions, 7583 events. 3140/7583 cut-off events. For 359610/359645 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69586 event pairs, 208 based on Foata normal form. 26/7521 useless extension candidates. Maximal degree in co-relation 97829. Up to 4341 conditions per place. [2022-11-21 17:12:35,991 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 2608 selfloop transitions, 1472 changer transitions 4/4125 dead transitions. [2022-11-21 17:12:35,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 4125 transitions, 127508 flow [2022-11-21 17:12:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-21 17:12:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-21 17:12:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1382 transitions. [2022-11-21 17:12:35,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6580952380952381 [2022-11-21 17:12:35,995 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1382 transitions. [2022-11-21 17:12:35,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1382 transitions. [2022-11-21 17:12:35,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:12:35,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1382 transitions. [2022-11-21 17:12:35,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.28) internal successors, (1382), 25 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states 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 17:12:36,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states 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 17:12:36,002 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states 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 17:12:36,002 INFO L175 Difference]: Start difference. First operand has 753 places, 3754 transitions, 108291 flow. Second operand 25 states and 1382 transitions. [2022-11-21 17:12:36,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 4125 transitions, 127508 flow [2022-11-21 17:12:46,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 4125 transitions, 114144 flow, removed 2750 selfloop flow, removed 51 redundant places. [2022-11-21 17:12:46,212 INFO L231 Difference]: Finished difference. Result has 711 places, 3907 transitions, 106333 flow [2022-11-21 17:12:46,214 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=96103, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=106333, PETRI_PLACES=711, PETRI_TRANSITIONS=3907} [2022-11-21 17:12:46,215 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 637 predicate places. [2022-11-21 17:12:46,215 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 3907 transitions, 106333 flow [2022-11-21 17:12:46,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states 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 17:12:46,215 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:12:46,216 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:12:46,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 17:12:46,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:12:46,416 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:12:46,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:12:46,417 INFO L85 PathProgramCache]: Analyzing trace with hash -789623059, now seen corresponding path program 19 times [2022-11-21 17:12:46,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:12:46,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833525824] [2022-11-21 17:12:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:12:46,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:12:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:46,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:12:46,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833525824] [2022-11-21 17:12:46,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833525824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:12:46,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766844776] [2022-11-21 17:12:46,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 17:12:46,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:12:46,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:12:46,654 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:12:46,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 17:12:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:12:46,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 17:12:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:12:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:47,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:12:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:12:47,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766844776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:12:47,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:12:47,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2022-11-21 17:12:47,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057527106] [2022-11-21 17:12:47,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:12:47,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-21 17:12:47,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:12:47,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-21 17:12:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-11-21 17:12:47,355 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:12:47,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 3907 transitions, 106333 flow. Second operand has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states 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 17:12:47,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:12:47,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:12:47,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:13:03,182 INFO L130 PetriNetUnfolder]: 3306/8039 cut-off events. [2022-11-21 17:13:03,182 INFO L131 PetriNetUnfolder]: For 339182/339201 co-relation queries the response was YES. [2022-11-21 17:13:03,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96028 conditions, 8039 events. 3306/8039 cut-off events. For 339182/339201 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 74722 event pairs, 141 based on Foata normal form. 15/7979 useless extension candidates. Maximal degree in co-relation 95802. Up to 2786 conditions per place. [2022-11-21 17:13:03,507 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2397 selfloop transitions, 1771 changer transitions 5/4214 dead transitions. [2022-11-21 17:13:03,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 4214 transitions, 123959 flow [2022-11-21 17:13:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-21 17:13:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-21 17:13:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1553 transitions. [2022-11-21 17:13:03,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6602891156462585 [2022-11-21 17:13:03,515 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1553 transitions. [2022-11-21 17:13:03,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1553 transitions. [2022-11-21 17:13:03,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:13:03,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1553 transitions. [2022-11-21 17:13:03,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.464285714285715) internal successors, (1553), 28 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states 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 17:13:03,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 17:13:03,522 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states 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 17:13:03,523 INFO L175 Difference]: Start difference. First operand has 711 places, 3907 transitions, 106333 flow. Second operand 28 states and 1553 transitions. [2022-11-21 17:13:03,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 4214 transitions, 123959 flow [2022-11-21 17:13:12,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 4214 transitions, 122240 flow, removed 807 selfloop flow, removed 8 redundant places. [2022-11-21 17:13:12,928 INFO L231 Difference]: Finished difference. Result has 743 places, 4143 transitions, 119554 flow [2022-11-21 17:13:12,930 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=104810, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=119554, PETRI_PLACES=743, PETRI_TRANSITIONS=4143} [2022-11-21 17:13:12,930 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 669 predicate places. [2022-11-21 17:13:12,931 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 4143 transitions, 119554 flow [2022-11-21 17:13:12,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states 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 17:13:12,931 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:13:12,931 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:13:12,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-21 17:13:13,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:13:13,138 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:13:13,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:13:13,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1480117485, now seen corresponding path program 20 times [2022-11-21 17:13:13,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:13:13,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595271232] [2022-11-21 17:13:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:13:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:13,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:13,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595271232] [2022-11-21 17:13:13,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595271232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:13:13,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61287302] [2022-11-21 17:13:13,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 17:13:13,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:13:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:13:13,301 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:13:13,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 17:13:13,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 17:13:13,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:13:13,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:13:13,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:13:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:13,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:13:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:13,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61287302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:13:13,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:13:13,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-21 17:13:13,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8653081] [2022-11-21 17:13:13,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:13:13,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-21 17:13:13,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:13,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-21 17:13:13,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-21 17:13:13,903 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:13:13,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 4143 transitions, 119554 flow. Second operand has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 17:13:13,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:13:13,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:13:13,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:13:30,433 INFO L130 PetriNetUnfolder]: 3314/7942 cut-off events. [2022-11-21 17:13:30,433 INFO L131 PetriNetUnfolder]: For 385610/385629 co-relation queries the response was YES. [2022-11-21 17:13:30,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100437 conditions, 7942 events. 3314/7942 cut-off events. For 385610/385629 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 72883 event pairs, 219 based on Foata normal form. 30/7878 useless extension candidates. Maximal degree in co-relation 100200. Up to 3548 conditions per place. [2022-11-21 17:13:30,785 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2570 selfloop transitions, 1645 changer transitions 2/4258 dead transitions. [2022-11-21 17:13:30,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 4258 transitions, 130862 flow [2022-11-21 17:13:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 17:13:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-21 17:13:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1809 transitions. [2022-11-21 17:13:30,788 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6525974025974026 [2022-11-21 17:13:30,788 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1809 transitions. [2022-11-21 17:13:30,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1809 transitions. [2022-11-21 17:13:30,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:13:30,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1809 transitions. [2022-11-21 17:13:30,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 54.81818181818182) internal successors, (1809), 33 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states 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 17:13:30,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states 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 17:13:30,796 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states 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 17:13:30,796 INFO L175 Difference]: Start difference. First operand has 743 places, 4143 transitions, 119554 flow. Second operand 33 states and 1809 transitions. [2022-11-21 17:13:30,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 4258 transitions, 130862 flow [2022-11-21 17:13:41,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 759 places, 4258 transitions, 129612 flow, removed 579 selfloop flow, removed 14 redundant places. [2022-11-21 17:13:41,806 INFO L231 Difference]: Finished difference. Result has 762 places, 4195 transitions, 125049 flow [2022-11-21 17:13:41,808 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=117657, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=125049, PETRI_PLACES=762, PETRI_TRANSITIONS=4195} [2022-11-21 17:13:41,809 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 688 predicate places. [2022-11-21 17:13:41,809 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 4195 transitions, 125049 flow [2022-11-21 17:13:41,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states 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 17:13:41,809 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:13:41,809 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:13:41,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-21 17:13:42,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:13:42,010 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 17:13:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:13:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1898688641, now seen corresponding path program 21 times [2022-11-21 17:13:42,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:13:42,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199903898] [2022-11-21 17:13:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:13:42,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:13:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:13:42,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:42,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:13:42,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199903898] [2022-11-21 17:13:42,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199903898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 17:13:42,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926079035] [2022-11-21 17:13:42,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 17:13:42,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 17:13:42,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:13:42,157 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 17:13:42,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd1abf4b-89fb-420b-8d26-d8d872cd7df5/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 17:13:42,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 17:13:42,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 17:13:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 17:13:42,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 17:13:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:42,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 17:13:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:13:42,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926079035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 17:13:42,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 17:13:42,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-21 17:13:42,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572078100] [2022-11-21 17:13:42,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 17:13:42,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 17:13:42,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:13:42,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 17:13:42,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-21 17:13:42,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-21 17:13:42,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 4195 transitions, 125049 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states 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 17:13:42,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:13:42,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-21 17:13:42,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand