./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-context1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-context1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 10:54:57,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:54:57,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:54:57,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:54:57,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:54:57,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:54:57,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:54:57,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:54:57,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:54:57,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:54:57,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:54:57,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:54:57,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:54:57,643 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:54:57,644 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:54:57,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:54:57,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:54:57,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:54:57,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:54:57,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:54:57,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:54:57,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:54:57,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:54:57,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:54:57,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:54:57,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:54:57,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:54:57,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:54:57,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:54:57,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:54:57,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:54:57,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:54:57,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:54:57,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:54:57,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:54:57,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:54:57,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:54:57,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:54:57,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:54:57,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:54:57,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:54:57,689 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 10:54:57,730 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:54:57,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:54:57,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:54:57,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:54:57,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:54:57,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:54:57,735 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:54:57,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:54:57,735 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:54:57,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:54:57,736 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:54:57,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:54:57,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:54:57,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:54:57,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 10:54:57,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:54:57,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 10:54:57,738 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:54:57,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 10:54:57,738 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:54:57,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 10:54:57,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:54:57,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:54:57,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:54:57,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:54:57,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:54:57,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:54:57,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 10:54:57,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 10:54:57,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 10:54:57,742 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 10:54:57,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 10:54:57,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 10:54:57,743 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_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6c10414fe2617d00008bf9d366bc6ac1618cf93ea0f6ae08bc6c5a126364bce [2022-11-16 10:54:58,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:54:58,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:54:58,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:54:58,096 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:54:58,097 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:54:58,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-16 10:54:58,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/data/d859e8c81/0f60344f852e459ab679a3c13438ad88/FLAGe173c1464 [2022-11-16 10:54:58,627 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:54:58,628 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/sv-benchmarks/c/weaver/test-context1.wvr.c [2022-11-16 10:54:58,640 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/data/d859e8c81/0f60344f852e459ab679a3c13438ad88/FLAGe173c1464 [2022-11-16 10:54:59,008 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/data/d859e8c81/0f60344f852e459ab679a3c13438ad88 [2022-11-16 10:54:59,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:54:59,016 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:54:59,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:54:59,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:54:59,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:54:59,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1afa02ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59, skipping insertion in model container [2022-11-16 10:54:59,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:54:59,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:54:59,301 WARN L229 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_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-16 10:54:59,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:54:59,315 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 10:54:59,339 WARN L229 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_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/sv-benchmarks/c/weaver/test-context1.wvr.c[2433,2446] [2022-11-16 10:54:59,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:54:59,356 INFO L208 MainTranslator]: Completed translation [2022-11-16 10:54:59,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59 WrapperNode [2022-11-16 10:54:59,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:54:59,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 10:54:59,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 10:54:59,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 10:54:59,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,405 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 131 [2022-11-16 10:54:59,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 10:54:59,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 10:54:59,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 10:54:59,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 10:54:59,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,435 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 10:54:59,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 10:54:59,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 10:54:59,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 10:54:59,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (1/1) ... [2022-11-16 10:54:59,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:54:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:54:59,469 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 10:54:59,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 10:54:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 10:54:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 10:54:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 10:54:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 10:54:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 10:54:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 10:54:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 10:54:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 10:54:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 10:54:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 10:54:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 10:54:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 10:54:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 10:54:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 10:54:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 10:54:59,508 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 10:54:59,598 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 10:54:59,600 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 10:54:59,848 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 10:55:00,089 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 10:55:00,090 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 10:55:00,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:55:00 BoogieIcfgContainer [2022-11-16 10:55:00,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 10:55:00,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 10:55:00,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 10:55:00,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 10:55:00,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 10:54:59" (1/3) ... [2022-11-16 10:55:00,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39dde63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:55:00, skipping insertion in model container [2022-11-16 10:55:00,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:54:59" (2/3) ... [2022-11-16 10:55:00,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39dde63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:55:00, skipping insertion in model container [2022-11-16 10:55:00,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:55:00" (3/3) ... [2022-11-16 10:55:00,111 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2022-11-16 10:55:00,125 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 10:55:00,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 10:55:00,137 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 10:55:00,137 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 10:55:00,239 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 10:55:00,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 116 transitions, 248 flow [2022-11-16 10:55:00,364 INFO L130 PetriNetUnfolder]: 9/114 cut-off events. [2022-11-16 10:55:00,365 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 10:55:00,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2022-11-16 10:55:00,371 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 116 transitions, 248 flow [2022-11-16 10:55:00,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2022-11-16 10:55:00,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 10:55:00,404 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;@31f1fd44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 10:55:00,404 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 10:55:00,469 INFO L130 PetriNetUnfolder]: 9/104 cut-off events. [2022-11-16 10:55:00,469 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 10:55:00,470 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:00,470 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:00,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:00,479 INFO L85 PathProgramCache]: Analyzing trace with hash -112901485, now seen corresponding path program 1 times [2022-11-16 10:55:00,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:00,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557640995] [2022-11-16 10:55:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:00,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:00,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557640995] [2022-11-16 10:55:00,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557640995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:00,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:00,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:55:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889370939] [2022-11-16 10:55:00,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:00,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 10:55:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:00,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 10:55:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 10:55:00,790 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 116 [2022-11-16 10:55:00,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 222 flow. Second operand has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:00,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:00,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 116 [2022-11-16 10:55:00,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:00,873 INFO L130 PetriNetUnfolder]: 5/101 cut-off events. [2022-11-16 10:55:00,873 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 10:55:00,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 101 events. 5/101 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 47 event pairs, 0 based on Foata normal form. 8/103 useless extension candidates. Maximal degree in co-relation 79. Up to 9 conditions per place. [2022-11-16 10:55:00,876 INFO L137 encePairwiseOnDemand]: 110/116 looper letters, 6 selfloop transitions, 0 changer transitions 3/99 dead transitions. [2022-11-16 10:55:00,876 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 99 transitions, 222 flow [2022-11-16 10:55:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 10:55:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 10:55:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 218 transitions. [2022-11-16 10:55:00,892 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9396551724137931 [2022-11-16 10:55:00,893 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 218 transitions. [2022-11-16 10:55:00,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 218 transitions. [2022-11-16 10:55:00,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:00,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 218 transitions. [2022-11-16 10:55:00,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 109.0) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:00,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:00,904 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:00,907 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 222 flow. Second operand 2 states and 218 transitions. [2022-11-16 10:55:00,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 99 transitions, 222 flow [2022-11-16 10:55:00,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 10:55:00,914 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 196 flow [2022-11-16 10:55:00,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=196, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2022-11-16 10:55:00,920 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -3 predicate places. [2022-11-16 10:55:00,920 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 196 flow [2022-11-16 10:55:00,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 106.5) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:00,921 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:00,921 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:00,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 10:55:00,922 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:00,922 INFO L85 PathProgramCache]: Analyzing trace with hash 647030864, now seen corresponding path program 1 times [2022-11-16 10:55:00,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:00,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135613347] [2022-11-16 10:55:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:00,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:01,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135613347] [2022-11-16 10:55:01,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135613347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:01,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:01,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 10:55:01,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844017029] [2022-11-16 10:55:01,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:01,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:55:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:01,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:55:01,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:55:01,415 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-16 10:55:01,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:01,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-16 10:55:01,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:01,517 INFO L130 PetriNetUnfolder]: 7/116 cut-off events. [2022-11-16 10:55:01,518 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 10:55:01,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 116 events. 7/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 148. Up to 15 conditions per place. [2022-11-16 10:55:01,519 INFO L137 encePairwiseOnDemand]: 111/116 looper letters, 21 selfloop transitions, 2 changer transitions 4/103 dead transitions. [2022-11-16 10:55:01,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 103 transitions, 266 flow [2022-11-16 10:55:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:55:01,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 10:55:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 458 transitions. [2022-11-16 10:55:01,523 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7896551724137931 [2022-11-16 10:55:01,523 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 458 transitions. [2022-11-16 10:55:01,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 458 transitions. [2022-11-16 10:55:01,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:01,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 458 transitions. [2022-11-16 10:55:01,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.6) internal successors, (458), 5 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,529 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,531 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 196 flow. Second operand 5 states and 458 transitions. [2022-11-16 10:55:01,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 103 transitions, 266 flow [2022-11-16 10:55:01,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 103 transitions, 266 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 10:55:01,535 INFO L231 Difference]: Finished difference. Result has 104 places, 97 transitions, 212 flow [2022-11-16 10:55:01,536 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=212, PETRI_PLACES=104, PETRI_TRANSITIONS=97} [2022-11-16 10:55:01,536 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 1 predicate places. [2022-11-16 10:55:01,537 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 97 transitions, 212 flow [2022-11-16 10:55:01,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,537 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:01,537 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:01,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 10:55:01,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash 454314870, now seen corresponding path program 1 times [2022-11-16 10:55:01,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:01,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700694889] [2022-11-16 10:55:01,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:01,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:01,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:01,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700694889] [2022-11-16 10:55:01,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700694889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:01,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:01,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:55:01,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032554913] [2022-11-16 10:55:01,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:01,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:55:01,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:01,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:55:01,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:55:01,670 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-16 10:55:01,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 97 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:01,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-16 10:55:01,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:01,731 INFO L130 PetriNetUnfolder]: 8/138 cut-off events. [2022-11-16 10:55:01,731 INFO L131 PetriNetUnfolder]: For 13/14 co-relation queries the response was YES. [2022-11-16 10:55:01,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 138 events. 8/138 cut-off events. For 13/14 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 1 based on Foata normal form. 3/133 useless extension candidates. Maximal degree in co-relation 170. Up to 15 conditions per place. [2022-11-16 10:55:01,734 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 8 selfloop transitions, 2 changer transitions 2/101 dead transitions. [2022-11-16 10:55:01,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 247 flow [2022-11-16 10:55:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:55:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 10:55:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 318 transitions. [2022-11-16 10:55:01,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9137931034482759 [2022-11-16 10:55:01,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 318 transitions. [2022-11-16 10:55:01,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 318 transitions. [2022-11-16 10:55:01,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:01,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 318 transitions. [2022-11-16 10:55:01,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,745 INFO L175 Difference]: Start difference. First operand has 104 places, 97 transitions, 212 flow. Second operand 3 states and 318 transitions. [2022-11-16 10:55:01,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 247 flow [2022-11-16 10:55:01,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 101 transitions, 241 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-16 10:55:01,753 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 218 flow [2022-11-16 10:55:01,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2022-11-16 10:55:01,756 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -1 predicate places. [2022-11-16 10:55:01,756 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 218 flow [2022-11-16 10:55:01,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:01,757 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:01,757 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:01,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 10:55:01,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:01,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:01,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1650815490, now seen corresponding path program 1 times [2022-11-16 10:55:01,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:01,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300268139] [2022-11-16 10:55:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:01,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:55:02,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:02,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300268139] [2022-11-16 10:55:02,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300268139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:02,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:02,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 10:55:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267887428] [2022-11-16 10:55:02,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:02,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 10:55:02,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 10:55:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 10:55:02,275 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 116 [2022-11-16 10:55:02,276 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 218 flow. Second operand has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:02,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:02,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 116 [2022-11-16 10:55:02,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:02,454 INFO L130 PetriNetUnfolder]: 8/181 cut-off events. [2022-11-16 10:55:02,455 INFO L131 PetriNetUnfolder]: For 23/24 co-relation queries the response was YES. [2022-11-16 10:55:02,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 181 events. 8/181 cut-off events. For 23/24 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 355 event pairs, 1 based on Foata normal form. 3/173 useless extension candidates. Maximal degree in co-relation 245. Up to 15 conditions per place. [2022-11-16 10:55:02,458 INFO L137 encePairwiseOnDemand]: 106/116 looper letters, 20 selfloop transitions, 9 changer transitions 7/110 dead transitions. [2022-11-16 10:55:02,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 110 transitions, 321 flow [2022-11-16 10:55:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 10:55:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 10:55:02,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 819 transitions. [2022-11-16 10:55:02,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7844827586206896 [2022-11-16 10:55:02,462 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 819 transitions. [2022-11-16 10:55:02,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 819 transitions. [2022-11-16 10:55:02,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:02,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 819 transitions. [2022-11-16 10:55:02,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 91.0) internal successors, (819), 9 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:02,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:02,473 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 116.0) internal successors, (1160), 10 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:02,473 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 218 flow. Second operand 9 states and 819 transitions. [2022-11-16 10:55:02,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 110 transitions, 321 flow [2022-11-16 10:55:02,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 110 transitions, 319 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 10:55:02,480 INFO L231 Difference]: Finished difference. Result has 110 places, 99 transitions, 242 flow [2022-11-16 10:55:02,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2022-11-16 10:55:02,482 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 7 predicate places. [2022-11-16 10:55:02,482 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 242 flow [2022-11-16 10:55:02,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.25) internal successors, (714), 8 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:02,483 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:02,483 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:02,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 10:55:02,484 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:02,485 INFO L85 PathProgramCache]: Analyzing trace with hash 422775831, now seen corresponding path program 1 times [2022-11-16 10:55:02,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:02,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467932466] [2022-11-16 10:55:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:02,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:55:03,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:03,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467932466] [2022-11-16 10:55:03,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467932466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:03,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536998066] [2022-11-16 10:55:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:03,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:03,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:03,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:03,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 10:55:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:03,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 10:55:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:03,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 10:55:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:55:03,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:04,088 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 10:55:04,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2022-11-16 10:55:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:55:04,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536998066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:04,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:04,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 7] total 14 [2022-11-16 10:55:04,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299411072] [2022-11-16 10:55:04,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:04,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 10:55:04,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 10:55:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-16 10:55:04,225 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 116 [2022-11-16 10:55:04,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 99 transitions, 242 flow. Second operand has 14 states, 14 states have (on average 71.07142857142857) internal successors, (995), 14 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:04,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:04,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 116 [2022-11-16 10:55:04,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:04,629 INFO L130 PetriNetUnfolder]: 28/232 cut-off events. [2022-11-16 10:55:04,629 INFO L131 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2022-11-16 10:55:04,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 232 events. 28/232 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 642 event pairs, 0 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 386. Up to 25 conditions per place. [2022-11-16 10:55:04,632 INFO L137 encePairwiseOnDemand]: 100/116 looper letters, 41 selfloop transitions, 15 changer transitions 8/121 dead transitions. [2022-11-16 10:55:04,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 121 transitions, 434 flow [2022-11-16 10:55:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 10:55:04,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-16 10:55:04,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1054 transitions. [2022-11-16 10:55:04,636 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6057471264367816 [2022-11-16 10:55:04,636 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1054 transitions. [2022-11-16 10:55:04,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1054 transitions. [2022-11-16 10:55:04,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:04,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1054 transitions. [2022-11-16 10:55:04,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 70.26666666666667) internal successors, (1054), 15 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:04,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:04,646 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:04,646 INFO L175 Difference]: Start difference. First operand has 110 places, 99 transitions, 242 flow. Second operand 15 states and 1054 transitions. [2022-11-16 10:55:04,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 121 transitions, 434 flow [2022-11-16 10:55:04,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 121 transitions, 420 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 10:55:04,654 INFO L231 Difference]: Finished difference. Result has 121 places, 102 transitions, 287 flow [2022-11-16 10:55:04,654 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=287, PETRI_PLACES=121, PETRI_TRANSITIONS=102} [2022-11-16 10:55:04,657 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2022-11-16 10:55:04,657 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 102 transitions, 287 flow [2022-11-16 10:55:04,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 71.07142857142857) internal successors, (995), 14 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:04,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:04,661 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:04,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:04,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:04,867 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:04,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:04,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1916387233, now seen corresponding path program 2 times [2022-11-16 10:55:04,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:04,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573666709] [2022-11-16 10:55:04,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:04,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:55:06,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573666709] [2022-11-16 10:55:06,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573666709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:06,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696324488] [2022-11-16 10:55:06,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:55:06,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:06,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:06,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:06,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 10:55:06,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:55:06,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 10:55:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:06,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 10:55:07,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 10:55:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:55:07,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 10:55:07,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 10:55:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:07,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:07,434 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_92 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_92) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2022-11-16 10:55:07,793 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_91 (Array Int Int)) (v_ArrVal_92 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_91)) (.cse1 (* c_~front~0 4))) (or (= 5 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_92) |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ .cse1 |c_ULTIMATE.start_main_#t~ret9#1.offset|))) (not (= 5 (select (select .cse0 |c_ULTIMATE.start_main_#t~ret9#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_main_#t~ret9#1.offset|))))))) is different from false [2022-11-16 10:55:07,927 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_91 (Array Int Int)) (v_ArrVal_92 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_91)) (.cse1 (* c_~front~0 4))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_92) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 5) (not (= 5 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))))) is different from false [2022-11-16 10:55:08,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:55:08,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-16 10:55:08,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:55:08,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 167 [2022-11-16 10:55:08,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 106 [2022-11-16 10:55:08,046 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:55:08,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 122 [2022-11-16 10:55:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 10:55:08,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696324488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:08,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:08,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 16] total 37 [2022-11-16 10:55:08,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161677599] [2022-11-16 10:55:08,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:08,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 10:55:08,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:08,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 10:55:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=972, Unknown=26, NotChecked=198, Total=1332 [2022-11-16 10:55:08,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 116 [2022-11-16 10:55:08,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 102 transitions, 287 flow. Second operand has 37 states, 37 states have (on average 54.351351351351354) internal successors, (2011), 37 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:08,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:08,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 116 [2022-11-16 10:55:08,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:10,013 INFO L130 PetriNetUnfolder]: 68/441 cut-off events. [2022-11-16 10:55:10,014 INFO L131 PetriNetUnfolder]: For 308/314 co-relation queries the response was YES. [2022-11-16 10:55:10,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 858 conditions, 441 events. 68/441 cut-off events. For 308/314 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2223 event pairs, 2 based on Foata normal form. 6/415 useless extension candidates. Maximal degree in co-relation 847. Up to 82 conditions per place. [2022-11-16 10:55:10,020 INFO L137 encePairwiseOnDemand]: 93/116 looper letters, 60 selfloop transitions, 35 changer transitions 10/150 dead transitions. [2022-11-16 10:55:10,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 150 transitions, 688 flow [2022-11-16 10:55:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 10:55:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-16 10:55:10,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1274 transitions. [2022-11-16 10:55:10,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4775112443778111 [2022-11-16 10:55:10,025 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1274 transitions. [2022-11-16 10:55:10,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1274 transitions. [2022-11-16 10:55:10,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:10,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1274 transitions. [2022-11-16 10:55:10,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.391304347826086) internal successors, (1274), 23 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:10,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 116.0) internal successors, (2784), 24 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:10,039 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 116.0) internal successors, (2784), 24 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:10,040 INFO L175 Difference]: Start difference. First operand has 121 places, 102 transitions, 287 flow. Second operand 23 states and 1274 transitions. [2022-11-16 10:55:10,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 150 transitions, 688 flow [2022-11-16 10:55:10,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 150 transitions, 656 flow, removed 3 selfloop flow, removed 12 redundant places. [2022-11-16 10:55:10,047 INFO L231 Difference]: Finished difference. Result has 134 places, 123 transitions, 499 flow [2022-11-16 10:55:10,047 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=499, PETRI_PLACES=134, PETRI_TRANSITIONS=123} [2022-11-16 10:55:10,051 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 31 predicate places. [2022-11-16 10:55:10,051 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 123 transitions, 499 flow [2022-11-16 10:55:10,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.351351351351354) internal successors, (2011), 37 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:10,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:10,053 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:10,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:10,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:10,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:10,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash -372518993, now seen corresponding path program 3 times [2022-11-16 10:55:10,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:10,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037743736] [2022-11-16 10:55:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:10,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:10,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:10,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037743736] [2022-11-16 10:55:10,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037743736] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:10,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291577673] [2022-11-16 10:55:10,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 10:55:10,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:10,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:10,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:10,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 10:55:10,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 10:55:10,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:10,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 10:55:10,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:11,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 10:55:11,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:55:11,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 10:55:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:55:11,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:11,821 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 10:55:11,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2022-11-16 10:55:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:55:12,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291577673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:12,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:12,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 13] total 35 [2022-11-16 10:55:12,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883531606] [2022-11-16 10:55:12,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:12,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 10:55:12,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 10:55:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 10:55:12,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-11-16 10:55:12,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 123 transitions, 499 flow. Second operand has 35 states, 35 states have (on average 60.05714285714286) internal successors, (2102), 35 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:12,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:12,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-11-16 10:55:12,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:13,712 INFO L130 PetriNetUnfolder]: 84/583 cut-off events. [2022-11-16 10:55:13,713 INFO L131 PetriNetUnfolder]: For 957/988 co-relation queries the response was YES. [2022-11-16 10:55:13,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 583 events. 84/583 cut-off events. For 957/988 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3382 event pairs, 2 based on Foata normal form. 24/566 useless extension candidates. Maximal degree in co-relation 1312. Up to 79 conditions per place. [2022-11-16 10:55:13,717 INFO L137 encePairwiseOnDemand]: 92/116 looper letters, 84 selfloop transitions, 45 changer transitions 11/186 dead transitions. [2022-11-16 10:55:13,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 186 transitions, 1114 flow [2022-11-16 10:55:13,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 10:55:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 10:55:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1626 transitions. [2022-11-16 10:55:13,723 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5191570881226054 [2022-11-16 10:55:13,724 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1626 transitions. [2022-11-16 10:55:13,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1626 transitions. [2022-11-16 10:55:13,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:13,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1626 transitions. [2022-11-16 10:55:13,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 60.22222222222222) internal successors, (1626), 27 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:13,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:13,737 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:13,737 INFO L175 Difference]: Start difference. First operand has 134 places, 123 transitions, 499 flow. Second operand 27 states and 1626 transitions. [2022-11-16 10:55:13,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 186 transitions, 1114 flow [2022-11-16 10:55:13,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 186 transitions, 1012 flow, removed 29 selfloop flow, removed 16 redundant places. [2022-11-16 10:55:13,747 INFO L231 Difference]: Finished difference. Result has 153 places, 142 transitions, 703 flow [2022-11-16 10:55:13,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=703, PETRI_PLACES=153, PETRI_TRANSITIONS=142} [2022-11-16 10:55:13,748 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 50 predicate places. [2022-11-16 10:55:13,749 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 142 transitions, 703 flow [2022-11-16 10:55:13,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 60.05714285714286) internal successors, (2102), 35 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:13,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:13,750 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:13,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:13,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 10:55:13,956 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash 449497713, now seen corresponding path program 4 times [2022-11-16 10:55:13,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:13,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709980798] [2022-11-16 10:55:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:13,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:13,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:55:14,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709980798] [2022-11-16 10:55:14,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709980798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497186222] [2022-11-16 10:55:14,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 10:55:14,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:14,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:14,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:14,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 10:55:14,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 10:55:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 10:55:14,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:55:14,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:55:14,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497186222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:14,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:14,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-16 10:55:14,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311826553] [2022-11-16 10:55:14,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:14,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:55:14,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:14,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:55:14,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:55:14,451 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-16 10:55:14,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 142 transitions, 703 flow. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:14,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:14,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-16 10:55:14,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:14,614 INFO L130 PetriNetUnfolder]: 73/684 cut-off events. [2022-11-16 10:55:14,614 INFO L131 PetriNetUnfolder]: For 1022/1047 co-relation queries the response was YES. [2022-11-16 10:55:14,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1393 conditions, 684 events. 73/684 cut-off events. For 1022/1047 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4468 event pairs, 4 based on Foata normal form. 19/654 useless extension candidates. Maximal degree in co-relation 1370. Up to 81 conditions per place. [2022-11-16 10:55:14,621 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 26 selfloop transitions, 20 changer transitions 3/156 dead transitions. [2022-11-16 10:55:14,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 156 transitions, 885 flow [2022-11-16 10:55:14,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:55:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 10:55:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 425 transitions. [2022-11-16 10:55:14,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.915948275862069 [2022-11-16 10:55:14,623 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 425 transitions. [2022-11-16 10:55:14,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 425 transitions. [2022-11-16 10:55:14,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:14,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 425 transitions. [2022-11-16 10:55:14,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 106.25) internal successors, (425), 4 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:14,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:14,627 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:14,627 INFO L175 Difference]: Start difference. First operand has 153 places, 142 transitions, 703 flow. Second operand 4 states and 425 transitions. [2022-11-16 10:55:14,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 156 transitions, 885 flow [2022-11-16 10:55:14,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 156 transitions, 832 flow, removed 5 selfloop flow, removed 12 redundant places. [2022-11-16 10:55:14,635 INFO L231 Difference]: Finished difference. Result has 146 places, 147 transitions, 762 flow [2022-11-16 10:55:14,636 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=762, PETRI_PLACES=146, PETRI_TRANSITIONS=147} [2022-11-16 10:55:14,636 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 43 predicate places. [2022-11-16 10:55:14,636 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 147 transitions, 762 flow [2022-11-16 10:55:14,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:14,637 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:14,637 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:14,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:14,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 10:55:14,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1102803837, now seen corresponding path program 5 times [2022-11-16 10:55:14,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:14,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402457622] [2022-11-16 10:55:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:14,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:15,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:15,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402457622] [2022-11-16 10:55:15,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402457622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:15,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998288284] [2022-11-16 10:55:15,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 10:55:15,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:15,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:15,135 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:15,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 10:55:15,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 10:55:15,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:15,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 10:55:15,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:15,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:16,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998288284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:16,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:16,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-11-16 10:55:16,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587038305] [2022-11-16 10:55:16,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:16,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 10:55:16,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:16,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 10:55:16,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-16 10:55:16,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-16 10:55:16,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 147 transitions, 762 flow. Second operand has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:16,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:16,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-16 10:55:16,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:16,629 INFO L130 PetriNetUnfolder]: 61/689 cut-off events. [2022-11-16 10:55:16,629 INFO L131 PetriNetUnfolder]: For 1061/1078 co-relation queries the response was YES. [2022-11-16 10:55:16,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1456 conditions, 689 events. 61/689 cut-off events. For 1061/1078 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4427 event pairs, 6 based on Foata normal form. 12/646 useless extension candidates. Maximal degree in co-relation 1431. Up to 71 conditions per place. [2022-11-16 10:55:16,633 INFO L137 encePairwiseOnDemand]: 103/116 looper letters, 41 selfloop transitions, 19 changer transitions 24/162 dead transitions. [2022-11-16 10:55:16,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 162 transitions, 971 flow [2022-11-16 10:55:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 10:55:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-16 10:55:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1339 transitions. [2022-11-16 10:55:16,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7695402298850574 [2022-11-16 10:55:16,638 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1339 transitions. [2022-11-16 10:55:16,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1339 transitions. [2022-11-16 10:55:16,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:16,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1339 transitions. [2022-11-16 10:55:16,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 89.26666666666667) internal successors, (1339), 15 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:16,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:16,648 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 116.0) internal successors, (1856), 16 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:16,648 INFO L175 Difference]: Start difference. First operand has 146 places, 147 transitions, 762 flow. Second operand 15 states and 1339 transitions. [2022-11-16 10:55:16,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 162 transitions, 971 flow [2022-11-16 10:55:16,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 162 transitions, 962 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 10:55:16,661 INFO L231 Difference]: Finished difference. Result has 159 places, 132 transitions, 628 flow [2022-11-16 10:55:16,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=628, PETRI_PLACES=159, PETRI_TRANSITIONS=132} [2022-11-16 10:55:16,662 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 56 predicate places. [2022-11-16 10:55:16,663 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 132 transitions, 628 flow [2022-11-16 10:55:16,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.56) internal successors, (2214), 25 states have internal predecessors, (2214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:16,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:16,664 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:16,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:16,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:16,869 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:16,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:16,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2107155038, now seen corresponding path program 6 times [2022-11-16 10:55:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:16,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615303419] [2022-11-16 10:55:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 10:55:17,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:17,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615303419] [2022-11-16 10:55:17,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615303419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:17,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977152988] [2022-11-16 10:55:17,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 10:55:17,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:17,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:17,650 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:17,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 10:55:17,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 10:55:17,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:17,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 10:55:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:18,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:55:18,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 10:55:18,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 10:55:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 10:55:18,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:18,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:55:18,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 36 [2022-11-16 10:55:18,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-16 10:55:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 10:55:19,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977152988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:19,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:19,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 29 [2022-11-16 10:55:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617952262] [2022-11-16 10:55:19,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 10:55:19,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:19,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 10:55:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=700, Unknown=7, NotChecked=0, Total=812 [2022-11-16 10:55:19,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-11-16 10:55:19,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 132 transitions, 628 flow. Second operand has 29 states, 29 states have (on average 64.24137931034483) internal successors, (1863), 29 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:19,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:19,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-11-16 10:55:19,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:19,804 INFO L130 PetriNetUnfolder]: 89/644 cut-off events. [2022-11-16 10:55:19,804 INFO L131 PetriNetUnfolder]: For 1235/1257 co-relation queries the response was YES. [2022-11-16 10:55:19,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 644 events. 89/644 cut-off events. For 1235/1257 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3867 event pairs, 2 based on Foata normal form. 10/603 useless extension candidates. Maximal degree in co-relation 1505. Up to 72 conditions per place. [2022-11-16 10:55:19,809 INFO L137 encePairwiseOnDemand]: 100/116 looper letters, 60 selfloop transitions, 25 changer transitions 8/151 dead transitions. [2022-11-16 10:55:19,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 151 transitions, 917 flow [2022-11-16 10:55:19,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 10:55:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-16 10:55:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1103 transitions. [2022-11-16 10:55:19,813 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5593306288032455 [2022-11-16 10:55:19,813 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1103 transitions. [2022-11-16 10:55:19,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1103 transitions. [2022-11-16 10:55:19,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:19,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1103 transitions. [2022-11-16 10:55:19,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.88235294117646) internal successors, (1103), 17 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:19,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:19,821 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 116.0) internal successors, (2088), 18 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:19,821 INFO L175 Difference]: Start difference. First operand has 159 places, 132 transitions, 628 flow. Second operand 17 states and 1103 transitions. [2022-11-16 10:55:19,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 151 transitions, 917 flow [2022-11-16 10:55:19,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 151 transitions, 849 flow, removed 8 selfloop flow, removed 18 redundant places. [2022-11-16 10:55:19,828 INFO L231 Difference]: Finished difference. Result has 150 places, 133 transitions, 643 flow [2022-11-16 10:55:19,829 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=643, PETRI_PLACES=150, PETRI_TRANSITIONS=133} [2022-11-16 10:55:19,829 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 47 predicate places. [2022-11-16 10:55:19,829 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 133 transitions, 643 flow [2022-11-16 10:55:19,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 64.24137931034483) internal successors, (1863), 29 states have internal predecessors, (1863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:19,830 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:19,831 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:19,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 10:55:20,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:20,036 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:20,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:20,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1204690504, now seen corresponding path program 7 times [2022-11-16 10:55:20,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:20,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095641897] [2022-11-16 10:55:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:20,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 10:55:20,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:20,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095641897] [2022-11-16 10:55:20,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095641897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:20,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498069672] [2022-11-16 10:55:20,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 10:55:20,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:20,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:20,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:20,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 10:55:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:20,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 10:55:20,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:21,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 10:55:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:55:21,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:21,329 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 10:55:21,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-16 10:55:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 10:55:21,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498069672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:21,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:21,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 23 [2022-11-16 10:55:21,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145141693] [2022-11-16 10:55:21,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:21,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 10:55:21,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 10:55:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-16 10:55:21,459 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-16 10:55:21,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 133 transitions, 643 flow. Second operand has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:21,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:21,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-16 10:55:21,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:22,701 INFO L130 PetriNetUnfolder]: 120/791 cut-off events. [2022-11-16 10:55:22,701 INFO L131 PetriNetUnfolder]: For 1826/1848 co-relation queries the response was YES. [2022-11-16 10:55:22,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 791 events. 120/791 cut-off events. For 1826/1848 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5290 event pairs, 2 based on Foata normal form. 14/743 useless extension candidates. Maximal degree in co-relation 1996. Up to 88 conditions per place. [2022-11-16 10:55:22,707 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 93 selfloop transitions, 45 changer transitions 44/232 dead transitions. [2022-11-16 10:55:22,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 232 transitions, 1581 flow [2022-11-16 10:55:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-16 10:55:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-16 10:55:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2385 transitions. [2022-11-16 10:55:22,712 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5556849953401678 [2022-11-16 10:55:22,712 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2385 transitions. [2022-11-16 10:55:22,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2385 transitions. [2022-11-16 10:55:22,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:22,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2385 transitions. [2022-11-16 10:55:22,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 64.45945945945945) internal successors, (2385), 37 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:22,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:22,743 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 116.0) internal successors, (4408), 38 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:22,744 INFO L175 Difference]: Start difference. First operand has 150 places, 133 transitions, 643 flow. Second operand 37 states and 2385 transitions. [2022-11-16 10:55:22,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 232 transitions, 1581 flow [2022-11-16 10:55:22,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 232 transitions, 1523 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-16 10:55:22,753 INFO L231 Difference]: Finished difference. Result has 186 places, 142 transitions, 860 flow [2022-11-16 10:55:22,754 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=860, PETRI_PLACES=186, PETRI_TRANSITIONS=142} [2022-11-16 10:55:22,754 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 83 predicate places. [2022-11-16 10:55:22,754 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 142 transitions, 860 flow [2022-11-16 10:55:22,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:22,756 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:22,756 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:22,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:22,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 10:55:22,968 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:22,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2130323068, now seen corresponding path program 8 times [2022-11-16 10:55:22,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:22,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205334153] [2022-11-16 10:55:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:22,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 10:55:23,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:23,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205334153] [2022-11-16 10:55:23,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205334153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:23,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691119687] [2022-11-16 10:55:23,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:55:23,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:23,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:23,803 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:23,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 10:55:23,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:55:23,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 10:55:23,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:24,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:55:24,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 10:55:24,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 10:55:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 10:55:24,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:24,767 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_250 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_250) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2022-11-16 10:55:24,791 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:55:24,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2022-11-16 10:55:24,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-16 10:55:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 10:55:25,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691119687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:25,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:25,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 36 [2022-11-16 10:55:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745060150] [2022-11-16 10:55:25,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 10:55:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:25,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 10:55:25,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1074, Unknown=1, NotChecked=66, Total=1260 [2022-11-16 10:55:25,245 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 116 [2022-11-16 10:55:25,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 142 transitions, 860 flow. Second operand has 36 states, 36 states have (on average 63.75) internal successors, (2295), 36 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:25,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:25,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 116 [2022-11-16 10:55:25,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:26,631 INFO L130 PetriNetUnfolder]: 137/873 cut-off events. [2022-11-16 10:55:26,631 INFO L131 PetriNetUnfolder]: For 2802/2842 co-relation queries the response was YES. [2022-11-16 10:55:26,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2351 conditions, 873 events. 137/873 cut-off events. For 2802/2842 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6088 event pairs, 2 based on Foata normal form. 14/814 useless extension candidates. Maximal degree in co-relation 2313. Up to 98 conditions per place. [2022-11-16 10:55:26,639 INFO L137 encePairwiseOnDemand]: 98/116 looper letters, 70 selfloop transitions, 49 changer transitions 20/197 dead transitions. [2022-11-16 10:55:26,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 197 transitions, 1497 flow [2022-11-16 10:55:26,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 10:55:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 10:55:26,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1571 transitions. [2022-11-16 10:55:26,643 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5642959770114943 [2022-11-16 10:55:26,643 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1571 transitions. [2022-11-16 10:55:26,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1571 transitions. [2022-11-16 10:55:26,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:26,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1571 transitions. [2022-11-16 10:55:26,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.45833333333333) internal successors, (1571), 24 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:26,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:26,650 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 116.0) internal successors, (2900), 25 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:26,650 INFO L175 Difference]: Start difference. First operand has 186 places, 142 transitions, 860 flow. Second operand 24 states and 1571 transitions. [2022-11-16 10:55:26,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 197 transitions, 1497 flow [2022-11-16 10:55:26,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 197 transitions, 1338 flow, removed 49 selfloop flow, removed 24 redundant places. [2022-11-16 10:55:26,666 INFO L231 Difference]: Finished difference. Result has 179 places, 150 transitions, 937 flow [2022-11-16 10:55:26,667 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=937, PETRI_PLACES=179, PETRI_TRANSITIONS=150} [2022-11-16 10:55:26,669 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 76 predicate places. [2022-11-16 10:55:26,669 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 150 transitions, 937 flow [2022-11-16 10:55:26,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 63.75) internal successors, (2295), 36 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:26,670 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:26,670 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:26,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 10:55:26,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 10:55:26,876 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:26,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:26,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1187849882, now seen corresponding path program 9 times [2022-11-16 10:55:26,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:26,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862979800] [2022-11-16 10:55:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:26,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 10:55:27,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:27,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862979800] [2022-11-16 10:55:27,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862979800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:27,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046819342] [2022-11-16 10:55:27,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 10:55:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:27,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:27,009 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:27,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 10:55:27,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 10:55:27,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 10:55:27,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:28,204 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-11-16 10:55:28,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 10:55:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:55:28,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:28,482 INFO L321 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-11-16 10:55:28,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-16 10:55:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:55:29,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046819342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:29,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:29,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18, 18] total 34 [2022-11-16 10:55:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713236105] [2022-11-16 10:55:29,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:29,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 10:55:29,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:29,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 10:55:29,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 10:55:29,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 116 [2022-11-16 10:55:29,578 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 150 transitions, 937 flow. Second operand has 34 states, 34 states have (on average 67.02941176470588) internal successors, (2279), 34 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:29,578 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:29,578 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 116 [2022-11-16 10:55:29,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:35,937 INFO L130 PetriNetUnfolder]: 1128/5906 cut-off events. [2022-11-16 10:55:35,937 INFO L131 PetriNetUnfolder]: For 29374/29759 co-relation queries the response was YES. [2022-11-16 10:55:35,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17274 conditions, 5906 events. 1128/5906 cut-off events. For 29374/29759 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 69043 event pairs, 3 based on Foata normal form. 146/5565 useless extension candidates. Maximal degree in co-relation 17241. Up to 842 conditions per place. [2022-11-16 10:55:35,993 INFO L137 encePairwiseOnDemand]: 92/116 looper letters, 244 selfloop transitions, 400 changer transitions 140/837 dead transitions. [2022-11-16 10:55:35,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 837 transitions, 9460 flow [2022-11-16 10:55:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-11-16 10:55:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2022-11-16 10:55:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 7184 transitions. [2022-11-16 10:55:36,007 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5898193760262725 [2022-11-16 10:55:36,007 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 7184 transitions. [2022-11-16 10:55:36,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 7184 transitions. [2022-11-16 10:55:36,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:36,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 7184 transitions. [2022-11-16 10:55:36,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 68.41904761904762) internal successors, (7184), 105 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:36,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 116.0) internal successors, (12296), 106 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:36,057 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 116.0) internal successors, (12296), 106 states have internal predecessors, (12296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:36,058 INFO L175 Difference]: Start difference. First operand has 179 places, 150 transitions, 937 flow. Second operand 105 states and 7184 transitions. [2022-11-16 10:55:36,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 837 transitions, 9460 flow [2022-11-16 10:55:36,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 837 transitions, 8658 flow, removed 261 selfloop flow, removed 19 redundant places. [2022-11-16 10:55:36,139 INFO L231 Difference]: Finished difference. Result has 300 places, 527 transitions, 6270 flow [2022-11-16 10:55:36,140 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=6270, PETRI_PLACES=300, PETRI_TRANSITIONS=527} [2022-11-16 10:55:36,141 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 197 predicate places. [2022-11-16 10:55:36,141 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 527 transitions, 6270 flow [2022-11-16 10:55:36,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 67.02941176470588) internal successors, (2279), 34 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:36,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:36,142 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:36,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:36,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 10:55:36,348 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1307541964, now seen corresponding path program 10 times [2022-11-16 10:55:36,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:36,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103841883] [2022-11-16 10:55:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:36,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 10:55:36,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103841883] [2022-11-16 10:55:36,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103841883] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516810561] [2022-11-16 10:55:36,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 10:55:36,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:36,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:36,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:36,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 10:55:36,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 10:55:36,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:36,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 10:55:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 10:55:36,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 10:55:36,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516810561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:36,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:36,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-11-16 10:55:36,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296135633] [2022-11-16 10:55:36,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:36,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 10:55:36,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 10:55:36,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:55:36,870 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-16 10:55:36,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 527 transitions, 6270 flow. Second operand has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:36,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:36,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-16 10:55:36,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:38,609 INFO L130 PetriNetUnfolder]: 1077/6592 cut-off events. [2022-11-16 10:55:38,609 INFO L131 PetriNetUnfolder]: For 115963/116711 co-relation queries the response was YES. [2022-11-16 10:55:38,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28307 conditions, 6592 events. 1077/6592 cut-off events. For 115963/116711 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 81905 event pairs, 106 based on Foata normal form. 94/6123 useless extension candidates. Maximal degree in co-relation 28239. Up to 1044 conditions per place. [2022-11-16 10:55:38,680 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 220 selfloop transitions, 292 changer transitions 0/668 dead transitions. [2022-11-16 10:55:38,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 668 transitions, 9254 flow [2022-11-16 10:55:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:55:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 10:55:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2022-11-16 10:55:38,681 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9172413793103448 [2022-11-16 10:55:38,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2022-11-16 10:55:38,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2022-11-16 10:55:38,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:38,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2022-11-16 10:55:38,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:38,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:38,684 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:38,685 INFO L175 Difference]: Start difference. First operand has 300 places, 527 transitions, 6270 flow. Second operand 5 states and 532 transitions. [2022-11-16 10:55:38,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 668 transitions, 9254 flow [2022-11-16 10:55:39,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 668 transitions, 7367 flow, removed 887 selfloop flow, removed 14 redundant places. [2022-11-16 10:55:39,027 INFO L231 Difference]: Finished difference. Result has 282 places, 645 transitions, 7356 flow [2022-11-16 10:55:39,028 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4918, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7356, PETRI_PLACES=282, PETRI_TRANSITIONS=645} [2022-11-16 10:55:39,028 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 179 predicate places. [2022-11-16 10:55:39,028 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 645 transitions, 7356 flow [2022-11-16 10:55:39,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 104.16666666666667) internal successors, (625), 6 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:39,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:39,029 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:39,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-16 10:55:39,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 10:55:39,230 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:39,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1243291946, now seen corresponding path program 11 times [2022-11-16 10:55:39,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:39,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681852836] [2022-11-16 10:55:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:39,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 10:55:39,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:39,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681852836] [2022-11-16 10:55:39,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681852836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:39,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050058589] [2022-11-16 10:55:39,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 10:55:39,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:39,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:39,780 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:39,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 10:55:39,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 10:55:39,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:39,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 10:55:39,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 10:55:40,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 10:55:41,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050058589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:41,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:41,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-11-16 10:55:41,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377320886] [2022-11-16 10:55:41,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:41,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 10:55:41,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:41,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 10:55:41,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1233, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 10:55:41,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-16 10:55:41,315 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 645 transitions, 7356 flow. Second operand has 40 states, 40 states have (on average 88.15) internal successors, (3526), 40 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:41,315 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:41,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-16 10:55:41,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:42,694 INFO L130 PetriNetUnfolder]: 250/2221 cut-off events. [2022-11-16 10:55:42,694 INFO L131 PetriNetUnfolder]: For 39187/39519 co-relation queries the response was YES. [2022-11-16 10:55:42,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9128 conditions, 2221 events. 250/2221 cut-off events. For 39187/39519 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 21418 event pairs, 55 based on Foata normal form. 68/2079 useless extension candidates. Maximal degree in co-relation 9063. Up to 428 conditions per place. [2022-11-16 10:55:42,715 INFO L137 encePairwiseOnDemand]: 102/116 looper letters, 116 selfloop transitions, 17 changer transitions 62/280 dead transitions. [2022-11-16 10:55:42,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 280 transitions, 3434 flow [2022-11-16 10:55:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 10:55:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-16 10:55:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2049 transitions. [2022-11-16 10:55:42,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7679910044977512 [2022-11-16 10:55:42,719 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2049 transitions. [2022-11-16 10:55:42,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2049 transitions. [2022-11-16 10:55:42,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:42,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2049 transitions. [2022-11-16 10:55:42,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 89.08695652173913) internal successors, (2049), 23 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:42,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 116.0) internal successors, (2784), 24 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:42,728 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 116.0) internal successors, (2784), 24 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:42,728 INFO L175 Difference]: Start difference. First operand has 282 places, 645 transitions, 7356 flow. Second operand 23 states and 2049 transitions. [2022-11-16 10:55:42,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 280 transitions, 3434 flow [2022-11-16 10:55:42,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 280 transitions, 2694 flow, removed 193 selfloop flow, removed 34 redundant places. [2022-11-16 10:55:42,785 INFO L231 Difference]: Finished difference. Result has 225 places, 212 transitions, 1602 flow [2022-11-16 10:55:42,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1602, PETRI_PLACES=225, PETRI_TRANSITIONS=212} [2022-11-16 10:55:42,786 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 122 predicate places. [2022-11-16 10:55:42,787 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 212 transitions, 1602 flow [2022-11-16 10:55:42,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 88.15) internal successors, (3526), 40 states have internal predecessors, (3526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:42,788 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:42,788 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:42,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 10:55:42,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 10:55:42,994 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:42,994 INFO L85 PathProgramCache]: Analyzing trace with hash -2076698023, now seen corresponding path program 12 times [2022-11-16 10:55:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:42,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633588169] [2022-11-16 10:55:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:44,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:44,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633588169] [2022-11-16 10:55:44,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633588169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:44,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339367818] [2022-11-16 10:55:44,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 10:55:44,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:44,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:44,173 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:44,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 10:55:44,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 10:55:44,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:44,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 10:55:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:45,821 INFO L321 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-11-16 10:55:45,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-11-16 10:55:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 10:55:45,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:46,173 INFO L321 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2022-11-16 10:55:46,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2022-11-16 10:55:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 10:55:46,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339367818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:46,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:46,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 49 [2022-11-16 10:55:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372932792] [2022-11-16 10:55:46,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:46,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 10:55:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 10:55:46,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2054, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 10:55:46,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 116 [2022-11-16 10:55:46,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 212 transitions, 1602 flow. Second operand has 49 states, 49 states have (on average 59.38775510204081) internal successors, (2910), 49 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:46,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:46,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 116 [2022-11-16 10:55:46,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:51,925 INFO L130 PetriNetUnfolder]: 866/4948 cut-off events. [2022-11-16 10:55:51,926 INFO L131 PetriNetUnfolder]: For 31318/31819 co-relation queries the response was YES. [2022-11-16 10:55:51,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16251 conditions, 4948 events. 866/4948 cut-off events. For 31318/31819 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 56300 event pairs, 12 based on Foata normal form. 78/4633 useless extension candidates. Maximal degree in co-relation 16214. Up to 778 conditions per place. [2022-11-16 10:55:51,958 INFO L137 encePairwiseOnDemand]: 85/116 looper letters, 241 selfloop transitions, 318 changer transitions 90/695 dead transitions. [2022-11-16 10:55:51,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 695 transitions, 8261 flow [2022-11-16 10:55:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 10:55:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2022-11-16 10:55:51,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4323 transitions. [2022-11-16 10:55:51,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5176005747126436 [2022-11-16 10:55:51,968 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4323 transitions. [2022-11-16 10:55:51,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4323 transitions. [2022-11-16 10:55:51,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:51,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4323 transitions. [2022-11-16 10:55:51,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 60.041666666666664) internal successors, (4323), 72 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:51,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 116.0) internal successors, (8468), 73 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:51,993 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 116.0) internal successors, (8468), 73 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:51,993 INFO L175 Difference]: Start difference. First operand has 225 places, 212 transitions, 1602 flow. Second operand 72 states and 4323 transitions. [2022-11-16 10:55:51,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 695 transitions, 8261 flow [2022-11-16 10:55:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 695 transitions, 7133 flow, removed 452 selfloop flow, removed 24 redundant places. [2022-11-16 10:55:52,072 INFO L231 Difference]: Finished difference. Result has 277 places, 510 transitions, 5738 flow [2022-11-16 10:55:52,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=5738, PETRI_PLACES=277, PETRI_TRANSITIONS=510} [2022-11-16 10:55:52,073 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 174 predicate places. [2022-11-16 10:55:52,073 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 510 transitions, 5738 flow [2022-11-16 10:55:52,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 59.38775510204081) internal successors, (2910), 49 states have internal predecessors, (2910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:52,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:52,074 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:52,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:52,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:52,285 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:52,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:52,286 INFO L85 PathProgramCache]: Analyzing trace with hash 810338045, now seen corresponding path program 13 times [2022-11-16 10:55:52,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:52,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176947816] [2022-11-16 10:55:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:52,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:53,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:53,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176947816] [2022-11-16 10:55:53,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176947816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:53,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669314108] [2022-11-16 10:55:53,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 10:55:53,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:53,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:53,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:53,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 10:55:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:53,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 10:55:53,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:54,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 10:55:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:55:54,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:54,253 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 10:55:54,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-16 10:55:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 10:55:54,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669314108] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:54,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:54,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 10] total 35 [2022-11-16 10:55:54,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482339863] [2022-11-16 10:55:54,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:54,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 10:55:54,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:54,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 10:55:54,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 10:55:54,424 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-16 10:55:54,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 510 transitions, 5738 flow. Second operand has 35 states, 35 states have (on average 63.857142857142854) internal successors, (2235), 35 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:54,427 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:55:54,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-16 10:55:54,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:55:58,140 INFO L130 PetriNetUnfolder]: 1094/6015 cut-off events. [2022-11-16 10:55:58,140 INFO L131 PetriNetUnfolder]: For 38177/38937 co-relation queries the response was YES. [2022-11-16 10:55:58,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21581 conditions, 6015 events. 1094/6015 cut-off events. For 38177/38937 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 69866 event pairs, 5 based on Foata normal form. 160/5738 useless extension candidates. Maximal degree in co-relation 21523. Up to 888 conditions per place. [2022-11-16 10:55:58,179 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 353 selfloop transitions, 390 changer transitions 221/1014 dead transitions. [2022-11-16 10:55:58,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1014 transitions, 13544 flow [2022-11-16 10:55:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-16 10:55:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2022-11-16 10:55:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4842 transitions. [2022-11-16 10:55:58,186 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5565517241379311 [2022-11-16 10:55:58,186 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4842 transitions. [2022-11-16 10:55:58,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4842 transitions. [2022-11-16 10:55:58,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:55:58,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4842 transitions. [2022-11-16 10:55:58,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 64.56) internal successors, (4842), 75 states have internal predecessors, (4842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:58,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 116.0) internal successors, (8816), 76 states have internal predecessors, (8816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:58,209 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 116.0) internal successors, (8816), 76 states have internal predecessors, (8816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:58,209 INFO L175 Difference]: Start difference. First operand has 277 places, 510 transitions, 5738 flow. Second operand 75 states and 4842 transitions. [2022-11-16 10:55:58,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1014 transitions, 13544 flow [2022-11-16 10:55:58,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1014 transitions, 12876 flow, removed 308 selfloop flow, removed 28 redundant places. [2022-11-16 10:55:58,396 INFO L231 Difference]: Finished difference. Result has 335 places, 590 transitions, 7564 flow [2022-11-16 10:55:58,396 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=5416, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=7564, PETRI_PLACES=335, PETRI_TRANSITIONS=590} [2022-11-16 10:55:58,397 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 232 predicate places. [2022-11-16 10:55:58,397 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 590 transitions, 7564 flow [2022-11-16 10:55:58,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 63.857142857142854) internal successors, (2235), 35 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:58,398 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:55:58,398 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:58,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:58,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 10:55:58,604 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:55:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash -674985559, now seen corresponding path program 14 times [2022-11-16 10:55:58,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:58,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50328416] [2022-11-16 10:55:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:58,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:59,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:59,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50328416] [2022-11-16 10:55:59,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50328416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:59,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502298485] [2022-11-16 10:55:59,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:55:59,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:59,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:59,594 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:59,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 10:55:59,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:55:59,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 10:55:59,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:56:00,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 10:56:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 10:56:00,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:56:00,296 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 10:56:00,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-16 10:56:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 10:56:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502298485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:56:00,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:56:00,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 11] total 32 [2022-11-16 10:56:00,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757065738] [2022-11-16 10:56:00,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:56:00,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 10:56:00,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:56:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 10:56:00,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-11-16 10:56:00,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-16 10:56:00,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 590 transitions, 7564 flow. Second operand has 32 states, 32 states have (on average 63.96875) internal successors, (2047), 32 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:00,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:56:00,459 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-16 10:56:00,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:56:04,287 INFO L130 PetriNetUnfolder]: 1234/6832 cut-off events. [2022-11-16 10:56:04,288 INFO L131 PetriNetUnfolder]: For 49456/50239 co-relation queries the response was YES. [2022-11-16 10:56:04,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25192 conditions, 6832 events. 1234/6832 cut-off events. For 49456/50239 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 82772 event pairs, 14 based on Foata normal form. 138/6452 useless extension candidates. Maximal degree in co-relation 25117. Up to 982 conditions per place. [2022-11-16 10:56:04,343 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 417 selfloop transitions, 441 changer transitions 154/1062 dead transitions. [2022-11-16 10:56:04,344 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1062 transitions, 14851 flow [2022-11-16 10:56:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 10:56:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-16 10:56:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3595 transitions. [2022-11-16 10:56:04,349 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5634796238244514 [2022-11-16 10:56:04,350 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3595 transitions. [2022-11-16 10:56:04,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3595 transitions. [2022-11-16 10:56:04,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:56:04,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3595 transitions. [2022-11-16 10:56:04,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 65.36363636363636) internal successors, (3595), 55 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:04,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 116.0) internal successors, (6496), 56 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:04,367 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 116.0) internal successors, (6496), 56 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:04,367 INFO L175 Difference]: Start difference. First operand has 335 places, 590 transitions, 7564 flow. Second operand 55 states and 3595 transitions. [2022-11-16 10:56:04,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1062 transitions, 14851 flow [2022-11-16 10:56:04,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1062 transitions, 14391 flow, removed 180 selfloop flow, removed 40 redundant places. [2022-11-16 10:56:04,627 INFO L231 Difference]: Finished difference. Result has 334 places, 641 transitions, 8971 flow [2022-11-16 10:56:04,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=8971, PETRI_PLACES=334, PETRI_TRANSITIONS=641} [2022-11-16 10:56:04,627 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 231 predicate places. [2022-11-16 10:56:04,628 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 641 transitions, 8971 flow [2022-11-16 10:56:04,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 63.96875) internal successors, (2047), 32 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:04,628 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:56:04,628 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:56:04,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 10:56:04,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 10:56:04,829 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:56:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:56:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash 139201719, now seen corresponding path program 15 times [2022-11-16 10:56:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:56:04,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530329611] [2022-11-16 10:56:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:56:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:56:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:56:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:06,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:56:06,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530329611] [2022-11-16 10:56:06,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530329611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:56:06,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012743178] [2022-11-16 10:56:06,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 10:56:06,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:06,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:56:06,071 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:56:06,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 10:56:06,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 10:56:06,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:56:06,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 10:56:06,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:56:08,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:56:08,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 10:56:08,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 10:56:08,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:56:08,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 10:56:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:08,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:56:08,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:56:08,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2022-11-16 10:56:08,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-16 10:56:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:12,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012743178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:56:12,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:56:12,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29, 29] total 69 [2022-11-16 10:56:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034635415] [2022-11-16 10:56:12,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:56:12,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-16 10:56:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:56:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-16 10:56:12,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=4316, Unknown=0, NotChecked=0, Total=4692 [2022-11-16 10:56:12,511 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 116 [2022-11-16 10:56:12,514 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 641 transitions, 8971 flow. Second operand has 69 states, 69 states have (on average 49.53623188405797) internal successors, (3418), 69 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:12,514 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:56:12,514 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 116 [2022-11-16 10:56:12,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:56:22,112 INFO L130 PetriNetUnfolder]: 2700/15752 cut-off events. [2022-11-16 10:56:22,112 INFO L131 PetriNetUnfolder]: For 114814/116244 co-relation queries the response was YES. [2022-11-16 10:56:22,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56888 conditions, 15752 events. 2700/15752 cut-off events. For 114814/116244 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 223898 event pairs, 0 based on Foata normal form. 281/14731 useless extension candidates. Maximal degree in co-relation 56827. Up to 2141 conditions per place. [2022-11-16 10:56:22,207 INFO L137 encePairwiseOnDemand]: 88/116 looper letters, 219 selfloop transitions, 227 changer transitions 1018/1504 dead transitions. [2022-11-16 10:56:22,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1504 transitions, 23932 flow [2022-11-16 10:56:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-16 10:56:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-16 10:56:22,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3634 transitions. [2022-11-16 10:56:22,215 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4412336085478388 [2022-11-16 10:56:22,215 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3634 transitions. [2022-11-16 10:56:22,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3634 transitions. [2022-11-16 10:56:22,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:56:22,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3634 transitions. [2022-11-16 10:56:22,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 51.183098591549296) internal successors, (3634), 71 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:22,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 116.0) internal successors, (8352), 72 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:22,235 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 116.0) internal successors, (8352), 72 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:22,235 INFO L175 Difference]: Start difference. First operand has 334 places, 641 transitions, 8971 flow. Second operand 71 states and 3634 transitions. [2022-11-16 10:56:22,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1504 transitions, 23932 flow [2022-11-16 10:56:22,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1504 transitions, 22916 flow, removed 249 selfloop flow, removed 39 redundant places. [2022-11-16 10:56:22,863 INFO L231 Difference]: Finished difference. Result has 384 places, 388 transitions, 5259 flow [2022-11-16 10:56:22,863 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=8463, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=5259, PETRI_PLACES=384, PETRI_TRANSITIONS=388} [2022-11-16 10:56:22,864 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 281 predicate places. [2022-11-16 10:56:22,864 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 388 transitions, 5259 flow [2022-11-16 10:56:22,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 49.53623188405797) internal successors, (3418), 69 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:22,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:56:22,865 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:56:22,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 10:56:23,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:23,067 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:56:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:56:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash -623407913, now seen corresponding path program 16 times [2022-11-16 10:56:23,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:56:23,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829248075] [2022-11-16 10:56:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:56:23,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:56:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:56:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 20 proven. 39 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 10:56:23,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:56:23,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829248075] [2022-11-16 10:56:23,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829248075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:56:23,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468952991] [2022-11-16 10:56:23,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 10:56:23,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:23,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:56:23,787 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:56:23,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 10:56:23,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 10:56:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:56:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 10:56:23,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:56:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 24 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 10:56:24,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:56:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 33 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 10:56:25,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468952991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:56:25,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:56:25,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 48 [2022-11-16 10:56:25,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301710217] [2022-11-16 10:56:25,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:56:25,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 10:56:25,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:56:25,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 10:56:25,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1809, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 10:56:25,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 116 [2022-11-16 10:56:25,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 388 transitions, 5259 flow. Second operand has 48 states, 48 states have (on average 88.16666666666667) internal successors, (4232), 48 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:25,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:56:25,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 116 [2022-11-16 10:56:25,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:56:27,421 INFO L130 PetriNetUnfolder]: 552/3992 cut-off events. [2022-11-16 10:56:27,422 INFO L131 PetriNetUnfolder]: For 33867/34126 co-relation queries the response was YES. [2022-11-16 10:56:27,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14468 conditions, 3992 events. 552/3992 cut-off events. For 33867/34126 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 43384 event pairs, 134 based on Foata normal form. 32/3664 useless extension candidates. Maximal degree in co-relation 14389. Up to 969 conditions per place. [2022-11-16 10:56:27,447 INFO L137 encePairwiseOnDemand]: 102/116 looper letters, 234 selfloop transitions, 20 changer transitions 60/404 dead transitions. [2022-11-16 10:56:27,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 404 transitions, 5891 flow [2022-11-16 10:56:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 10:56:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-16 10:56:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2396 transitions. [2022-11-16 10:56:27,450 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7650063856960408 [2022-11-16 10:56:27,450 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2396 transitions. [2022-11-16 10:56:27,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2396 transitions. [2022-11-16 10:56:27,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:56:27,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2396 transitions. [2022-11-16 10:56:27,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 88.74074074074075) internal successors, (2396), 27 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:27,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:27,459 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 116.0) internal successors, (3248), 28 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:27,459 INFO L175 Difference]: Start difference. First operand has 384 places, 388 transitions, 5259 flow. Second operand 27 states and 2396 transitions. [2022-11-16 10:56:27,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 404 transitions, 5891 flow [2022-11-16 10:56:27,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 404 transitions, 5456 flow, removed 117 selfloop flow, removed 56 redundant places. [2022-11-16 10:56:27,590 INFO L231 Difference]: Finished difference. Result has 325 places, 337 transitions, 4185 flow [2022-11-16 10:56:27,591 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4594, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4185, PETRI_PLACES=325, PETRI_TRANSITIONS=337} [2022-11-16 10:56:27,591 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 222 predicate places. [2022-11-16 10:56:27,591 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 337 transitions, 4185 flow [2022-11-16 10:56:27,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 88.16666666666667) internal successors, (4232), 48 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:27,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:56:27,592 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:56:27,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 10:56:27,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-16 10:56:27,798 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:56:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:56:27,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1203872484, now seen corresponding path program 17 times [2022-11-16 10:56:27,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:56:27,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054249863] [2022-11-16 10:56:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:56:27,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:56:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:56:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 10:56:28,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:56:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054249863] [2022-11-16 10:56:28,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054249863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:56:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830021288] [2022-11-16 10:56:28,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 10:56:28,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:28,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:56:28,045 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:56:28,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 10:56:28,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-16 10:56:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:56:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 10:56:28,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:56:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 10:56:28,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:56:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 10:56:28,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830021288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:56:28,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:56:28,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-11-16 10:56:28,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261338750] [2022-11-16 10:56:28,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:56:28,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 10:56:28,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:56:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 10:56:28,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:56:28,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 116 [2022-11-16 10:56:28,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 337 transitions, 4185 flow. Second operand has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:28,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:56:28,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 116 [2022-11-16 10:56:28,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:56:29,882 INFO L130 PetriNetUnfolder]: 934/5825 cut-off events. [2022-11-16 10:56:29,882 INFO L131 PetriNetUnfolder]: For 43075/43412 co-relation queries the response was YES. [2022-11-16 10:56:29,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20231 conditions, 5825 events. 934/5825 cut-off events. For 43075/43412 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 69711 event pairs, 214 based on Foata normal form. 68/5402 useless extension candidates. Maximal degree in co-relation 20172. Up to 1200 conditions per place. [2022-11-16 10:56:29,921 INFO L137 encePairwiseOnDemand]: 113/116 looper letters, 106 selfloop transitions, 245 changer transitions 1/471 dead transitions. [2022-11-16 10:56:29,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 471 transitions, 7120 flow [2022-11-16 10:56:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:56:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 10:56:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2022-11-16 10:56:29,923 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9181034482758621 [2022-11-16 10:56:29,923 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2022-11-16 10:56:29,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2022-11-16 10:56:29,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:56:29,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2022-11-16 10:56:29,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:29,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:29,925 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:29,925 INFO L175 Difference]: Start difference. First operand has 325 places, 337 transitions, 4185 flow. Second operand 6 states and 639 transitions. [2022-11-16 10:56:29,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 471 transitions, 7120 flow [2022-11-16 10:56:30,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 471 transitions, 7004 flow, removed 26 selfloop flow, removed 27 redundant places. [2022-11-16 10:56:30,071 INFO L231 Difference]: Finished difference. Result has 278 places, 458 transitions, 7129 flow [2022-11-16 10:56:30,072 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7129, PETRI_PLACES=278, PETRI_TRANSITIONS=458} [2022-11-16 10:56:30,072 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 175 predicate places. [2022-11-16 10:56:30,073 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 458 transitions, 7129 flow [2022-11-16 10:56:30,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:30,073 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:56:30,073 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:56:30,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 10:56:30,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:30,279 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:56:30,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:56:30,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1796332850, now seen corresponding path program 18 times [2022-11-16 10:56:30,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:56:30,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422675634] [2022-11-16 10:56:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:56:30,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:56:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:56:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:31,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:56:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422675634] [2022-11-16 10:56:31,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422675634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:56:31,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567204460] [2022-11-16 10:56:31,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 10:56:31,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:31,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:56:31,561 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:56:31,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 10:56:31,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-16 10:56:31,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:56:31,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-16 10:56:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:56:32,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 10:56:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:56:32,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:56:32,776 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 10:56:32,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-16 10:56:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-16 10:56:32,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567204460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:56:32,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:56:32,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 12] total 36 [2022-11-16 10:56:32,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836280216] [2022-11-16 10:56:32,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:56:32,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 10:56:32,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:56:32,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 10:56:32,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 10:56:32,989 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-16 10:56:32,991 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 458 transitions, 7129 flow. Second operand has 36 states, 36 states have (on average 63.25) internal successors, (2277), 36 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:32,991 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:56:32,991 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-16 10:56:32,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:56:39,481 INFO L130 PetriNetUnfolder]: 1637/9026 cut-off events. [2022-11-16 10:56:39,481 INFO L131 PetriNetUnfolder]: For 81820/81871 co-relation queries the response was YES. [2022-11-16 10:56:39,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34935 conditions, 9026 events. 1637/9026 cut-off events. For 81820/81871 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 114141 event pairs, 0 based on Foata normal form. 34/8304 useless extension candidates. Maximal degree in co-relation 34881. Up to 2064 conditions per place. [2022-11-16 10:56:39,529 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 291 selfloop transitions, 469 changer transitions 215/1025 dead transitions. [2022-11-16 10:56:39,530 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1025 transitions, 16056 flow [2022-11-16 10:56:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-16 10:56:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-11-16 10:56:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 8169 transitions. [2022-11-16 10:56:39,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5589080459770115 [2022-11-16 10:56:39,539 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 8169 transitions. [2022-11-16 10:56:39,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 8169 transitions. [2022-11-16 10:56:39,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:56:39,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 8169 transitions. [2022-11-16 10:56:39,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 64.83333333333333) internal successors, (8169), 126 states have internal predecessors, (8169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:39,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 116.0) internal successors, (14732), 127 states have internal predecessors, (14732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:39,568 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 116.0) internal successors, (14732), 127 states have internal predecessors, (14732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:39,568 INFO L175 Difference]: Start difference. First operand has 278 places, 458 transitions, 7129 flow. Second operand 126 states and 8169 transitions. [2022-11-16 10:56:39,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1025 transitions, 16056 flow [2022-11-16 10:56:39,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1025 transitions, 15950 flow, removed 53 selfloop flow, removed 0 redundant places. [2022-11-16 10:56:39,816 INFO L231 Difference]: Finished difference. Result has 447 places, 593 transitions, 11353 flow [2022-11-16 10:56:39,817 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=7117, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=11353, PETRI_PLACES=447, PETRI_TRANSITIONS=593} [2022-11-16 10:56:39,817 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 344 predicate places. [2022-11-16 10:56:39,817 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 593 transitions, 11353 flow [2022-11-16 10:56:39,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 63.25) internal successors, (2277), 36 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:39,817 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:56:39,818 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:56:39,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 10:56:40,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:40,019 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:56:40,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:56:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1580446446, now seen corresponding path program 19 times [2022-11-16 10:56:40,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:56:40,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109559093] [2022-11-16 10:56:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:56:40,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:56:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:56:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:41,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:56:41,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109559093] [2022-11-16 10:56:41,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109559093] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:56:41,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329349905] [2022-11-16 10:56:41,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 10:56:41,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:41,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:56:41,304 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:56:41,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 10:56:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:56:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 10:56:41,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:56:42,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 10:56:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:56:42,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:56:42,423 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-16 10:56:42,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 13 [2022-11-16 10:56:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-16 10:56:42,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329349905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:56:42,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:56:42,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 13] total 36 [2022-11-16 10:56:42,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791877618] [2022-11-16 10:56:42,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:56:42,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 10:56:42,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:56:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 10:56:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 10:56:42,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 116 [2022-11-16 10:56:42,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 593 transitions, 11353 flow. Second operand has 36 states, 36 states have (on average 63.27777777777778) internal successors, (2278), 36 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:42,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:56:42,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 116 [2022-11-16 10:56:42,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:56:48,477 INFO L130 PetriNetUnfolder]: 1748/9607 cut-off events. [2022-11-16 10:56:48,477 INFO L131 PetriNetUnfolder]: For 109063/109113 co-relation queries the response was YES. [2022-11-16 10:56:48,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39796 conditions, 9607 events. 1748/9607 cut-off events. For 109063/109113 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 123463 event pairs, 0 based on Foata normal form. 14/8805 useless extension candidates. Maximal degree in co-relation 39697. Up to 2219 conditions per place. [2022-11-16 10:56:48,577 INFO L137 encePairwiseOnDemand]: 96/116 looper letters, 274 selfloop transitions, 495 changer transitions 127/946 dead transitions. [2022-11-16 10:56:48,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 946 transitions, 17105 flow [2022-11-16 10:56:48,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-16 10:56:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2022-11-16 10:56:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 5436 transitions. [2022-11-16 10:56:48,584 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5646032405484005 [2022-11-16 10:56:48,584 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 5436 transitions. [2022-11-16 10:56:48,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 5436 transitions. [2022-11-16 10:56:48,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:56:48,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 5436 transitions. [2022-11-16 10:56:48,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 65.49397590361446) internal successors, (5436), 83 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:48,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 116.0) internal successors, (9744), 84 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:48,606 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 116.0) internal successors, (9744), 84 states have internal predecessors, (9744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:48,606 INFO L175 Difference]: Start difference. First operand has 447 places, 593 transitions, 11353 flow. Second operand 83 states and 5436 transitions. [2022-11-16 10:56:48,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 946 transitions, 17105 flow [2022-11-16 10:56:49,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 946 transitions, 15800 flow, removed 309 selfloop flow, removed 59 redundant places. [2022-11-16 10:56:49,038 INFO L231 Difference]: Finished difference. Result has 448 places, 619 transitions, 11744 flow [2022-11-16 10:56:49,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=10135, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=11744, PETRI_PLACES=448, PETRI_TRANSITIONS=619} [2022-11-16 10:56:49,039 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 345 predicate places. [2022-11-16 10:56:49,039 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 619 transitions, 11744 flow [2022-11-16 10:56:49,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 63.27777777777778) internal successors, (2278), 36 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:49,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:56:49,040 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:56:49,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 10:56:49,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 10:56:49,240 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:56:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:56:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash -326036542, now seen corresponding path program 20 times [2022-11-16 10:56:49,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:56:49,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948852485] [2022-11-16 10:56:49,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:56:49,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:56:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:56:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:50,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:56:50,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948852485] [2022-11-16 10:56:50,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948852485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:56:50,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198225424] [2022-11-16 10:56:50,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:56:50,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:50,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:56:50,753 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:56:50,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 10:56:50,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:56:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:56:50,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 10:56:50,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:56:52,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:56:52,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-16 10:56:52,887 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-16 10:56:52,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-11-16 10:56:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:52,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:56:53,620 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:56:53,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2022-11-16 10:56:53,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-16 10:56:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:58,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198225424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:56:58,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:56:58,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 33, 33] total 80 [2022-11-16 10:56:58,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873767156] [2022-11-16 10:56:58,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:56:58,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-16 10:56:58,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:56:58,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-16 10:56:58,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=5869, Unknown=1, NotChecked=0, Total=6320 [2022-11-16 10:56:58,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 116 [2022-11-16 10:56:58,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 619 transitions, 11744 flow. Second operand has 80 states, 80 states have (on average 53.425) internal successors, (4274), 80 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:56:58,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:56:58,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 116 [2022-11-16 10:56:58,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 10:57:28,312 INFO L130 PetriNetUnfolder]: 6973/41255 cut-off events. [2022-11-16 10:57:28,312 INFO L131 PetriNetUnfolder]: For 474798/475138 co-relation queries the response was YES. [2022-11-16 10:57:28,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166217 conditions, 41255 events. 6973/41255 cut-off events. For 474798/475138 co-relation queries the response was YES. Maximal size of possible extension queue 2093. Compared 664399 event pairs, 20 based on Foata normal form. 207/37947 useless extension candidates. Maximal degree in co-relation 166139. Up to 9086 conditions per place. [2022-11-16 10:57:28,726 INFO L137 encePairwiseOnDemand]: 86/116 looper letters, 618 selfloop transitions, 1481 changer transitions 1109/3251 dead transitions. [2022-11-16 10:57:28,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 3251 transitions, 76422 flow [2022-11-16 10:57:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-11-16 10:57:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2022-11-16 10:57:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 6142 transitions. [2022-11-16 10:57:28,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47701149425287354 [2022-11-16 10:57:28,733 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 6142 transitions. [2022-11-16 10:57:28,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 6142 transitions. [2022-11-16 10:57:28,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 10:57:28,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 6142 transitions. [2022-11-16 10:57:28,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 55.333333333333336) internal successors, (6142), 111 states have internal predecessors, (6142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:28,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 116.0) internal successors, (12992), 112 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:28,759 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 116.0) internal successors, (12992), 112 states have internal predecessors, (12992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:28,759 INFO L175 Difference]: Start difference. First operand has 448 places, 619 transitions, 11744 flow. Second operand 111 states and 6142 transitions. [2022-11-16 10:57:28,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 3251 transitions, 76422 flow [2022-11-16 10:57:31,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 3251 transitions, 74169 flow, removed 607 selfloop flow, removed 59 redundant places. [2022-11-16 10:57:31,969 INFO L231 Difference]: Finished difference. Result has 548 places, 1762 transitions, 42432 flow [2022-11-16 10:57:31,970 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=11261, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=42432, PETRI_PLACES=548, PETRI_TRANSITIONS=1762} [2022-11-16 10:57:31,970 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 445 predicate places. [2022-11-16 10:57:31,970 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 1762 transitions, 42432 flow [2022-11-16 10:57:31,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 53.425) internal successors, (4274), 80 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:31,971 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 10:57:31,972 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:31,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:32,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:32,177 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 10:57:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash 327816064, now seen corresponding path program 21 times [2022-11-16 10:57:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:57:32,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657206024] [2022-11-16 10:57:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:32,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:57:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:33,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:57:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657206024] [2022-11-16 10:57:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657206024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:57:33,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459289253] [2022-11-16 10:57:33,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 10:57:33,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:57:33,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:57:33,739 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:57:33,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f5dd7f1-4903-4e35-8dc3-1d0ab1c7ac15/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 10:57:34,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 10:57:34,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:57:34,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 10:57:34,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:35,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:35,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2022-11-16 10:57:36,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 10:57:36,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:57:36,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-16 10:57:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 10:57:36,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:36,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 10:57:36,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2022-11-16 10:57:36,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-11-16 10:57:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 10:57:39,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459289253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:39,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:57:39,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 76 [2022-11-16 10:57:39,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211848180] [2022-11-16 10:57:39,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:39,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-16 10:57:39,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:57:39,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-16 10:57:39,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=5225, Unknown=0, NotChecked=0, Total=5700 [2022-11-16 10:57:39,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 116 [2022-11-16 10:57:39,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 1762 transitions, 42432 flow. Second operand has 76 states, 76 states have (on average 49.671052631578945) internal successors, (3775), 76 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:39,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 10:57:39,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 116 [2022-11-16 10:57:39,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand