./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/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_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/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_c3f1319f-e584-4cdc-b84f-f8fe508884c4/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 c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- 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 12:06:48,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:06:48,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:06:48,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:06:48,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:06:48,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:06:48,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:06:48,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:06:48,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:06:48,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:06:48,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:06:48,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:06:48,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:06:48,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:06:48,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:06:48,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:06:48,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:06:48,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:06:48,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:06:48,660 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:06:48,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:06:48,664 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:06:48,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:06:48,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:06:48,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:06:48,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:06:48,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:06:48,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:06:48,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:06:48,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:06:48,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:06:48,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:06:48,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:06:48,681 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:06:48,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:06:48,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:06:48,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:06:48,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:06:48,685 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:06:48,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:06:48,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:06:48,688 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:06:48,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:06:48,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:06:48,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:06:48,717 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:06:48,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:06:48,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:06:48,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:06:48,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:06:48,720 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:06:48,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:06:48,721 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:06:48,721 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:06:48,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:06:48,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:06:48,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:06:48,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:06:48,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:06:48,723 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:06:48,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:06:48,724 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:06:48,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:06:48,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:06:48,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:06:48,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:06:48,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:06:48,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:06:48,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:06:48,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:06:48,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:06:48,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:06:48,728 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:06:48,728 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:06:48,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:06:48,729 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_c3f1319f-e584-4cdc-b84f-f8fe508884c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-11-16 12:06:49,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:06:49,113 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:06:49,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:06:49,132 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:06:49,133 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:06:49,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-16 12:06:49,210 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/data/172911180/907936ee8485411680a2095868e928eb/FLAG1d334268f [2022-11-16 12:06:49,849 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:06:49,849 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-16 12:06:49,861 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/data/172911180/907936ee8485411680a2095868e928eb/FLAG1d334268f [2022-11-16 12:06:50,153 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/data/172911180/907936ee8485411680a2095868e928eb [2022-11-16 12:06:50,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:06:50,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:06:50,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:06:50,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:06:50,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:06:50,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@496b86b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50, skipping insertion in model container [2022-11-16 12:06:50,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,193 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:06:50,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:06:50,494 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_c3f1319f-e584-4cdc-b84f-f8fe508884c4/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-16 12:06:50,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:06:50,526 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:06:50,559 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_c3f1319f-e584-4cdc-b84f-f8fe508884c4/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-16 12:06:50,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:06:50,580 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:06:50,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50 WrapperNode [2022-11-16 12:06:50,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:06:50,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:06:50,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:06:50,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:06:50,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,644 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 315 [2022-11-16 12:06:50,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:06:50,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:06:50,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:06:50,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:06:50,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,715 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:06:50,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:06:50,740 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:06:50,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:06:50,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (1/1) ... [2022-11-16 12:06:50,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:06:50,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:50,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:06:50,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:06:50,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:06:50,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:06:50,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:06:50,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:06:50,842 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:06:50,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:06:50,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:06:50,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:06:50,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:06:50,843 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:06:50,843 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 12:06:50,844 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 12:06:50,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:06:50,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:06:50,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:06:50,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:06:50,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:06:50,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:06:50,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:06:50,846 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 12:06:51,044 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:06:51,056 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:06:51,885 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:06:52,196 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:06:52,197 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 12:06:52,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:06:52 BoogieIcfgContainer [2022-11-16 12:06:52,200 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:06:52,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:06:52,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:06:52,207 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:06:52,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:06:50" (1/3) ... [2022-11-16 12:06:52,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d698ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:06:52, skipping insertion in model container [2022-11-16 12:06:52,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:50" (2/3) ... [2022-11-16 12:06:52,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d698ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:06:52, skipping insertion in model container [2022-11-16 12:06:52,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:06:52" (3/3) ... [2022-11-16 12:06:52,211 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2022-11-16 12:06:52,222 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:06:52,235 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:06:52,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:06:52,236 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:06:52,338 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:06:52,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 245 transitions, 522 flow [2022-11-16 12:06:52,560 INFO L130 PetriNetUnfolder]: 19/241 cut-off events. [2022-11-16 12:06:52,560 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:06:52,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 241 events. 19/241 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 109 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 202. Up to 2 conditions per place. [2022-11-16 12:06:52,569 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 245 transitions, 522 flow [2022-11-16 12:06:52,582 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 222 places, 228 transitions, 480 flow [2022-11-16 12:06:52,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:06:52,620 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;@7e7b848b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:06:52,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-16 12:06:52,713 INFO L130 PetriNetUnfolder]: 19/227 cut-off events. [2022-11-16 12:06:52,713 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:06:52,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:52,715 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:06:52,716 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:06:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:52,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1330795915, now seen corresponding path program 1 times [2022-11-16 12:06:52,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:52,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65458607] [2022-11-16 12:06:52,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:52,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:53,237 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 12:06:53,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:53,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65458607] [2022-11-16 12:06:53,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65458607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:53,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:53,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:53,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903235718] [2022-11-16 12:06:53,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:06:53,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:53,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:06:53,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:06:53,344 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 245 [2022-11-16 12:06:53,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 228 transitions, 480 flow. Second operand has 2 states, 2 states have (on average 226.0) internal successors, (452), 2 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 12:06:53,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:53,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 245 [2022-11-16 12:06:53,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:53,646 INFO L130 PetriNetUnfolder]: 123/530 cut-off events. [2022-11-16 12:06:53,647 INFO L131 PetriNetUnfolder]: For 105/106 co-relation queries the response was YES. [2022-11-16 12:06:53,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 530 events. 123/530 cut-off events. For 105/106 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1704 event pairs, 51 based on Foata normal form. 126/594 useless extension candidates. Maximal degree in co-relation 504. Up to 163 conditions per place. [2022-11-16 12:06:53,661 INFO L137 encePairwiseOnDemand]: 232/245 looper letters, 12 selfloop transitions, 0 changer transitions 7/215 dead transitions. [2022-11-16 12:06:53,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 215 transitions, 478 flow [2022-11-16 12:06:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:06:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:06:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 463 transitions. [2022-11-16 12:06:53,689 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9448979591836735 [2022-11-16 12:06:53,690 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 463 transitions. [2022-11-16 12:06:53,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 463 transitions. [2022-11-16 12:06:53,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:53,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 463 transitions. [2022-11-16 12:06:53,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 231.5) internal successors, (463), 2 states have internal predecessors, (463), 0 states have call successors, (0), 0 states 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 12:06:53,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states 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 12:06:53,724 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states 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 12:06:53,726 INFO L175 Difference]: Start difference. First operand has 222 places, 228 transitions, 480 flow. Second operand 2 states and 463 transitions. [2022-11-16 12:06:53,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 215 transitions, 478 flow [2022-11-16 12:06:53,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 215 transitions, 462 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-16 12:06:53,741 INFO L231 Difference]: Finished difference. Result has 215 places, 208 transitions, 424 flow [2022-11-16 12:06:53,744 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=424, PETRI_PLACES=215, PETRI_TRANSITIONS=208} [2022-11-16 12:06:53,752 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, -7 predicate places. [2022-11-16 12:06:53,752 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 208 transitions, 424 flow [2022-11-16 12:06:53,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 226.0) internal successors, (452), 2 states have internal predecessors, (452), 0 states have call successors, (0), 0 states 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 12:06:53,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:53,754 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:06:53,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:06:53,755 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:06:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash 376234411, now seen corresponding path program 1 times [2022-11-16 12:06:53,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:53,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116771738] [2022-11-16 12:06:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:53,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:55,235 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 12:06:55,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:55,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116771738] [2022-11-16 12:06:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116771738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:55,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:55,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:06:55,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086713724] [2022-11-16 12:06:55,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:55,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:06:55,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:55,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:06:55,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:06:55,252 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 245 [2022-11-16 12:06:55,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 208 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states 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 12:06:55,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:55,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 245 [2022-11-16 12:06:55,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:55,849 INFO L130 PetriNetUnfolder]: 599/1332 cut-off events. [2022-11-16 12:06:55,850 INFO L131 PetriNetUnfolder]: For 99/99 co-relation queries the response was YES. [2022-11-16 12:06:55,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2244 conditions, 1332 events. 599/1332 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6626 event pairs, 88 based on Foata normal form. 0/1196 useless extension candidates. Maximal degree in co-relation 2241. Up to 375 conditions per place. [2022-11-16 12:06:55,864 INFO L137 encePairwiseOnDemand]: 237/245 looper letters, 70 selfloop transitions, 8 changer transitions 0/237 dead transitions. [2022-11-16 12:06:55,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 237 transitions, 649 flow [2022-11-16 12:06:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:06:55,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:06:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1480 transitions. [2022-11-16 12:06:55,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7551020408163265 [2022-11-16 12:06:55,868 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1480 transitions. [2022-11-16 12:06:55,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1480 transitions. [2022-11-16 12:06:55,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:55,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1480 transitions. [2022-11-16 12:06:55,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 185.0) internal successors, (1480), 8 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states 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 12:06:55,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states 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 12:06:55,880 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 245.0) internal successors, (2205), 9 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states 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 12:06:55,881 INFO L175 Difference]: Start difference. First operand has 215 places, 208 transitions, 424 flow. Second operand 8 states and 1480 transitions. [2022-11-16 12:06:55,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 237 transitions, 649 flow [2022-11-16 12:06:55,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 237 transitions, 649 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:06:55,891 INFO L231 Difference]: Finished difference. Result has 218 places, 212 transitions, 467 flow [2022-11-16 12:06:55,892 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=467, PETRI_PLACES=218, PETRI_TRANSITIONS=212} [2022-11-16 12:06:55,893 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, -4 predicate places. [2022-11-16 12:06:55,893 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 212 transitions, 467 flow [2022-11-16 12:06:55,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 181.0) internal successors, (1267), 7 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states 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 12:06:55,894 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:55,895 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:06:55,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:06:55,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:06:55,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:55,896 INFO L85 PathProgramCache]: Analyzing trace with hash -374302530, now seen corresponding path program 1 times [2022-11-16 12:06:55,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:55,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640998337] [2022-11-16 12:06:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:55,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:56,740 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 12:06:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640998337] [2022-11-16 12:06:56,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640998337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:56,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:56,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:06:56,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516335731] [2022-11-16 12:06:56,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:56,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:06:56,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:06:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:56,746 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 245 [2022-11-16 12:06:56,747 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 212 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 167.125) internal successors, (1337), 8 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 12:06:56,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:56,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 245 [2022-11-16 12:06:56,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:58,090 INFO L130 PetriNetUnfolder]: 2231/4309 cut-off events. [2022-11-16 12:06:58,091 INFO L131 PetriNetUnfolder]: For 1460/1461 co-relation queries the response was YES. [2022-11-16 12:06:58,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 4309 events. 2231/4309 cut-off events. For 1460/1461 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 28460 event pairs, 461 based on Foata normal form. 75/4053 useless extension candidates. Maximal degree in co-relation 8634. Up to 1156 conditions per place. [2022-11-16 12:06:58,128 INFO L137 encePairwiseOnDemand]: 235/245 looper letters, 112 selfloop transitions, 16 changer transitions 2/274 dead transitions. [2022-11-16 12:06:58,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 274 transitions, 904 flow [2022-11-16 12:06:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:06:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1568 transitions. [2022-11-16 12:06:58,132 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2022-11-16 12:06:58,132 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1568 transitions. [2022-11-16 12:06:58,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1568 transitions. [2022-11-16 12:06:58,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:58,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1568 transitions. [2022-11-16 12:06:58,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 174.22222222222223) internal successors, (1568), 9 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states 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 12:06:58,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states 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 12:06:58,143 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states 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 12:06:58,143 INFO L175 Difference]: Start difference. First operand has 218 places, 212 transitions, 467 flow. Second operand 9 states and 1568 transitions. [2022-11-16 12:06:58,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 274 transitions, 904 flow [2022-11-16 12:06:58,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 274 transitions, 893 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:06:58,151 INFO L231 Difference]: Finished difference. Result has 227 places, 222 transitions, 575 flow [2022-11-16 12:06:58,152 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=575, PETRI_PLACES=227, PETRI_TRANSITIONS=222} [2022-11-16 12:06:58,154 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 5 predicate places. [2022-11-16 12:06:58,155 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 222 transitions, 575 flow [2022-11-16 12:06:58,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 167.125) internal successors, (1337), 8 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states 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 12:06:58,156 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:58,156 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:06:58,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:06:58,157 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:06:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash -642356833, now seen corresponding path program 1 times [2022-11-16 12:06:58,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:58,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479347649] [2022-11-16 12:06:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:58,610 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 12:06:58,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:58,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479347649] [2022-11-16 12:06:58,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479347649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:58,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:58,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:06:58,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391557357] [2022-11-16 12:06:58,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:58,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:58,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:58,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:58,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 245 [2022-11-16 12:06:58,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 222 transitions, 575 flow. Second operand has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:58,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:58,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 245 [2022-11-16 12:06:58,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:59,197 INFO L130 PetriNetUnfolder]: 454/1545 cut-off events. [2022-11-16 12:06:59,197 INFO L131 PetriNetUnfolder]: For 1679/1710 co-relation queries the response was YES. [2022-11-16 12:06:59,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3238 conditions, 1545 events. 454/1545 cut-off events. For 1679/1710 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 8925 event pairs, 142 based on Foata normal form. 42/1426 useless extension candidates. Maximal degree in co-relation 3226. Up to 582 conditions per place. [2022-11-16 12:06:59,215 INFO L137 encePairwiseOnDemand]: 234/245 looper letters, 43 selfloop transitions, 8 changer transitions 22/248 dead transitions. [2022-11-16 12:06:59,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 248 transitions, 787 flow [2022-11-16 12:06:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:06:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 12:06:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1802 transitions. [2022-11-16 12:06:59,224 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8172335600907029 [2022-11-16 12:06:59,225 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1802 transitions. [2022-11-16 12:06:59,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1802 transitions. [2022-11-16 12:06:59,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:59,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1802 transitions. [2022-11-16 12:06:59,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 200.22222222222223) internal successors, (1802), 9 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states 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 12:06:59,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states 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 12:06:59,235 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states 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 12:06:59,235 INFO L175 Difference]: Start difference. First operand has 227 places, 222 transitions, 575 flow. Second operand 9 states and 1802 transitions. [2022-11-16 12:06:59,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 248 transitions, 787 flow [2022-11-16 12:06:59,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 248 transitions, 776 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-16 12:06:59,249 INFO L231 Difference]: Finished difference. Result has 234 places, 223 transitions, 600 flow [2022-11-16 12:06:59,250 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=600, PETRI_PLACES=234, PETRI_TRANSITIONS=223} [2022-11-16 12:06:59,251 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 12 predicate places. [2022-11-16 12:06:59,251 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 223 transitions, 600 flow [2022-11-16 12:06:59,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:59,252 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:59,253 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:06:59,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:06:59,253 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:06:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:59,254 INFO L85 PathProgramCache]: Analyzing trace with hash -894250892, now seen corresponding path program 1 times [2022-11-16 12:06:59,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:59,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96432978] [2022-11-16 12:06:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:59,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:02,204 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 12:07:02,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:02,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96432978] [2022-11-16 12:07:02,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96432978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:02,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243575876] [2022-11-16 12:07:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:02,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:02,209 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:02,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:07:02,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:02,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-16 12:07:02,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:02,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12:07:02,686 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:07:02,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 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 12 treesize of output 18 [2022-11-16 12:07:03,799 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:07:03,800 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 15 treesize of output 15 [2022-11-16 12:07:04,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:07:05,697 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 12:07:05,932 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 12:07:06,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 12:07:06,457 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 12:07:07,052 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 25 treesize of output 7 [2022-11-16 12:07:07,260 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 12:07:07,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:11,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:11,218 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 73 treesize of output 61 [2022-11-16 12:07:11,229 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 1267 treesize of output 1235 [2022-11-16 12:07:11,253 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 1235 treesize of output 1139 [2022-11-16 12:07:11,276 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 1139 treesize of output 947 [2022-11-16 12:07:11,299 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 947 treesize of output 899 [2022-11-16 12:07:11,328 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 461 treesize of output 437 [2022-11-16 12:07:13,809 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 8 [2022-11-16 12:07:13,845 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 12:07:13,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243575876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:13,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:13,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 32, 30] total 74 [2022-11-16 12:07:13,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993853681] [2022-11-16 12:07:13,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:13,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 12:07:13,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:13,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 12:07:13,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=877, Invalid=4493, Unknown=32, NotChecked=0, Total=5402 [2022-11-16 12:07:13,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 245 [2022-11-16 12:07:13,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 223 transitions, 600 flow. Second operand has 74 states, 74 states have (on average 107.66216216216216) internal successors, (7967), 74 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states 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 12:07:13,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:07:13,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 245 [2022-11-16 12:07:13,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:07:37,803 INFO L130 PetriNetUnfolder]: 11273/21010 cut-off events. [2022-11-16 12:07:37,804 INFO L131 PetriNetUnfolder]: For 25235/25244 co-relation queries the response was YES. [2022-11-16 12:07:37,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53753 conditions, 21010 events. 11273/21010 cut-off events. For 25235/25244 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 180839 event pairs, 334 based on Foata normal form. 137/20088 useless extension candidates. Maximal degree in co-relation 53739. Up to 5940 conditions per place. [2022-11-16 12:07:38,063 INFO L137 encePairwiseOnDemand]: 202/245 looper letters, 707 selfloop transitions, 265 changer transitions 36/1104 dead transitions. [2022-11-16 12:07:38,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1104 transitions, 5931 flow [2022-11-16 12:07:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-16 12:07:38,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2022-11-16 12:07:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 11452 transitions. [2022-11-16 12:07:38,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4628005657708628 [2022-11-16 12:07:38,099 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 11452 transitions. [2022-11-16 12:07:38,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 11452 transitions. [2022-11-16 12:07:38,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:07:38,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 11452 transitions. [2022-11-16 12:07:38,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 113.38613861386139) internal successors, (11452), 101 states have internal predecessors, (11452), 0 states have call successors, (0), 0 states 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 12:07:38,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 245.0) internal successors, (24990), 102 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states 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 12:07:38,192 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 245.0) internal successors, (24990), 102 states have internal predecessors, (24990), 0 states have call successors, (0), 0 states 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 12:07:38,193 INFO L175 Difference]: Start difference. First operand has 234 places, 223 transitions, 600 flow. Second operand 101 states and 11452 transitions. [2022-11-16 12:07:38,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1104 transitions, 5931 flow [2022-11-16 12:07:38,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1104 transitions, 5831 flow, removed 40 selfloop flow, removed 6 redundant places. [2022-11-16 12:07:38,309 INFO L231 Difference]: Finished difference. Result has 363 places, 530 transitions, 3204 flow [2022-11-16 12:07:38,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=3204, PETRI_PLACES=363, PETRI_TRANSITIONS=530} [2022-11-16 12:07:38,313 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 141 predicate places. [2022-11-16 12:07:38,313 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 530 transitions, 3204 flow [2022-11-16 12:07:38,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 107.66216216216216) internal successors, (7967), 74 states have internal predecessors, (7967), 0 states have call successors, (0), 0 states 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 12:07:38,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:07:38,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:07:38,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:38,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:38,532 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:07:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:38,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1042410773, now seen corresponding path program 2 times [2022-11-16 12:07:38,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:38,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374654997] [2022-11-16 12:07:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:38,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:39,242 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 12:07:39,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:39,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374654997] [2022-11-16 12:07:39,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374654997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:39,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834275869] [2022-11-16 12:07:39,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:39,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:39,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:39,244 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:39,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:07:39,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:07:39,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:07:39,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:40,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:40,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834275869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:40,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:40,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 11] total 25 [2022-11-16 12:07:40,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187569005] [2022-11-16 12:07:40,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:40,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 12:07:40,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:40,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 12:07:40,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2022-11-16 12:07:40,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 245 [2022-11-16 12:07:40,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 530 transitions, 3204 flow. Second operand has 25 states, 25 states have (on average 174.72) internal successors, (4368), 25 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states 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 12:07:40,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:07:40,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 245 [2022-11-16 12:07:40,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:07:48,159 INFO L130 PetriNetUnfolder]: 11058/22620 cut-off events. [2022-11-16 12:07:48,159 INFO L131 PetriNetUnfolder]: For 48138/48902 co-relation queries the response was YES. [2022-11-16 12:07:48,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66881 conditions, 22620 events. 11058/22620 cut-off events. For 48138/48902 co-relation queries the response was YES. Maximal size of possible extension queue 1166. Compared 218193 event pairs, 598 based on Foata normal form. 548/21657 useless extension candidates. Maximal degree in co-relation 66831. Up to 5761 conditions per place. [2022-11-16 12:07:48,603 INFO L137 encePairwiseOnDemand]: 234/245 looper letters, 475 selfloop transitions, 302 changer transitions 4/996 dead transitions. [2022-11-16 12:07:48,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 996 transitions, 8201 flow [2022-11-16 12:07:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:07:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 12:07:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 5055 transitions. [2022-11-16 12:07:48,614 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7368804664723032 [2022-11-16 12:07:48,614 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 5055 transitions. [2022-11-16 12:07:48,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 5055 transitions. [2022-11-16 12:07:48,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:07:48,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 5055 transitions. [2022-11-16 12:07:48,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 180.53571428571428) internal successors, (5055), 28 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states 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 12:07:48,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 245.0) internal successors, (7105), 29 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states 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 12:07:48,642 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 245.0) internal successors, (7105), 29 states have internal predecessors, (7105), 0 states have call successors, (0), 0 states 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 12:07:48,642 INFO L175 Difference]: Start difference. First operand has 363 places, 530 transitions, 3204 flow. Second operand 28 states and 5055 transitions. [2022-11-16 12:07:48,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 996 transitions, 8201 flow [2022-11-16 12:07:49,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 996 transitions, 7323 flow, removed 426 selfloop flow, removed 24 redundant places. [2022-11-16 12:07:49,033 INFO L231 Difference]: Finished difference. Result has 369 places, 691 transitions, 5266 flow [2022-11-16 12:07:49,034 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5266, PETRI_PLACES=369, PETRI_TRANSITIONS=691} [2022-11-16 12:07:49,035 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 147 predicate places. [2022-11-16 12:07:49,035 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 691 transitions, 5266 flow [2022-11-16 12:07:49,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 174.72) internal successors, (4368), 25 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states 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 12:07:49,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:07:49,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:07:49,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:49,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 12:07:49,244 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:07:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash 847868953, now seen corresponding path program 3 times [2022-11-16 12:07:49,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:49,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761551466] [2022-11-16 12:07:49,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:49,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:49,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:49,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761551466] [2022-11-16 12:07:49,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761551466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:49,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174752735] [2022-11-16 12:07:49,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:07:49,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:49,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:49,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:07:50,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:07:50,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:07:50,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:50,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:50,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174752735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:50,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:50,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 12:07:50,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86370092] [2022-11-16 12:07:50,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:50,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 12:07:50,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 12:07:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:07:50,799 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 245 [2022-11-16 12:07:50,802 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 691 transitions, 5266 flow. Second operand has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states 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 12:07:50,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:07:50,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 245 [2022-11-16 12:07:50,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:07:54,978 INFO L130 PetriNetUnfolder]: 5065/12690 cut-off events. [2022-11-16 12:07:54,978 INFO L131 PetriNetUnfolder]: For 53073/53663 co-relation queries the response was YES. [2022-11-16 12:07:55,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39657 conditions, 12690 events. 5065/12690 cut-off events. For 53073/53663 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 125179 event pairs, 1059 based on Foata normal form. 429/12013 useless extension candidates. Maximal degree in co-relation 39603. Up to 4148 conditions per place. [2022-11-16 12:07:55,225 INFO L137 encePairwiseOnDemand]: 227/245 looper letters, 360 selfloop transitions, 49 changer transitions 1/669 dead transitions. [2022-11-16 12:07:55,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 669 transitions, 5716 flow [2022-11-16 12:07:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:07:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 12:07:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3404 transitions. [2022-11-16 12:07:55,233 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7718820861678004 [2022-11-16 12:07:55,233 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3404 transitions. [2022-11-16 12:07:55,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3404 transitions. [2022-11-16 12:07:55,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:07:55,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3404 transitions. [2022-11-16 12:07:55,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 189.11111111111111) internal successors, (3404), 18 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:55,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 245.0) internal successors, (4655), 19 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states 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 12:07:55,255 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 245.0) internal successors, (4655), 19 states have internal predecessors, (4655), 0 states have call successors, (0), 0 states 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 12:07:55,255 INFO L175 Difference]: Start difference. First operand has 369 places, 691 transitions, 5266 flow. Second operand 18 states and 3404 transitions. [2022-11-16 12:07:55,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 669 transitions, 5716 flow [2022-11-16 12:07:55,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 669 transitions, 5416 flow, removed 142 selfloop flow, removed 6 redundant places. [2022-11-16 12:07:55,739 INFO L231 Difference]: Finished difference. Result has 380 places, 607 transitions, 4387 flow [2022-11-16 12:07:55,740 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=4076, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4387, PETRI_PLACES=380, PETRI_TRANSITIONS=607} [2022-11-16 12:07:55,740 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 158 predicate places. [2022-11-16 12:07:55,740 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 607 transitions, 4387 flow [2022-11-16 12:07:55,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 187.57894736842104) internal successors, (3564), 19 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states 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 12:07:55,741 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:07:55,741 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:07:55,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:55,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:55,948 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:07:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:55,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1150958275, now seen corresponding path program 1 times [2022-11-16 12:07:55,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:55,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584120895] [2022-11-16 12:07:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:55,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 12:07:56,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:56,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584120895] [2022-11-16 12:07:56,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584120895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:07:56,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:07:56,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:07:56,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961272373] [2022-11-16 12:07:56,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:07:56,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:07:56,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:56,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:07:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:07:56,209 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 245 [2022-11-16 12:07:56,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 607 transitions, 4387 flow. Second operand has 6 states, 6 states have (on average 198.5) internal successors, (1191), 6 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states 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 12:07:56,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:07:56,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 245 [2022-11-16 12:07:56,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:08:01,335 INFO L130 PetriNetUnfolder]: 5289/15805 cut-off events. [2022-11-16 12:08:01,335 INFO L131 PetriNetUnfolder]: For 62736/63615 co-relation queries the response was YES. [2022-11-16 12:08:01,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45495 conditions, 15805 events. 5289/15805 cut-off events. For 62736/63615 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 175041 event pairs, 1064 based on Foata normal form. 1132/15421 useless extension candidates. Maximal degree in co-relation 45439. Up to 5600 conditions per place. [2022-11-16 12:08:01,589 INFO L137 encePairwiseOnDemand]: 236/245 looper letters, 364 selfloop transitions, 9 changer transitions 46/740 dead transitions. [2022-11-16 12:08:01,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 740 transitions, 6604 flow [2022-11-16 12:08:01,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:08:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:08:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1406 transitions. [2022-11-16 12:08:01,592 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8198250728862974 [2022-11-16 12:08:01,592 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1406 transitions. [2022-11-16 12:08:01,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1406 transitions. [2022-11-16 12:08:01,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:08:01,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1406 transitions. [2022-11-16 12:08:01,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.85714285714286) internal successors, (1406), 7 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states 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 12:08:01,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states 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 12:08:01,599 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states 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 12:08:01,600 INFO L175 Difference]: Start difference. First operand has 380 places, 607 transitions, 4387 flow. Second operand 7 states and 1406 transitions. [2022-11-16 12:08:01,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 740 transitions, 6604 flow [2022-11-16 12:08:01,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 740 transitions, 6467 flow, removed 10 selfloop flow, removed 13 redundant places. [2022-11-16 12:08:01,921 INFO L231 Difference]: Finished difference. Result has 375 places, 598 transitions, 4277 flow [2022-11-16 12:08:01,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4277, PETRI_PLACES=375, PETRI_TRANSITIONS=598} [2022-11-16 12:08:01,922 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 153 predicate places. [2022-11-16 12:08:01,923 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 598 transitions, 4277 flow [2022-11-16 12:08:01,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.5) internal successors, (1191), 6 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states 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 12:08:01,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:08:01,926 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:01,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:08:01,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:08:01,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:01,927 INFO L85 PathProgramCache]: Analyzing trace with hash -789534941, now seen corresponding path program 4 times [2022-11-16 12:08:01,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:01,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250112904] [2022-11-16 12:08:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:01,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:06,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:06,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250112904] [2022-11-16 12:08:06,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250112904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:06,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111244663] [2022-11-16 12:08:06,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:08:06,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:06,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:06,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:06,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:08:06,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:08:06,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:06,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-16 12:08:06,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:08,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:08,776 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 12:08:08,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:08,996 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 12:08:09,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:08:09,105 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 12:08:09,185 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 23 treesize of output 7 [2022-11-16 12:08:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:08:09,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:11,481 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_292 (Array Int Int)) (v_ArrVal_293 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_292) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_293) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2022-11-16 12:08:13,572 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_292 (Array Int Int)) (v_ArrVal_291 (Array Int Int)) (v_ArrVal_293 (Array Int Int))) (< 0 (+ (select (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_291) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_292) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_293) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2022-11-16 12:08:13,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:13,619 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 682 treesize of output 654 [2022-11-16 12:08:13,635 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 638 treesize of output 542 [2022-11-16 12:08:13,648 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 283 treesize of output 259 [2022-11-16 12:08:13,658 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 518 treesize of output 470 [2022-11-16 12:08:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-11-16 12:08:16,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111244663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:16,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:16,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 21] total 62 [2022-11-16 12:08:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541625677] [2022-11-16 12:08:16,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:16,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-16 12:08:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:16,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-16 12:08:16,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=3251, Unknown=8, NotChecked=234, Total=3782 [2022-11-16 12:08:16,855 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 245 [2022-11-16 12:08:16,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 598 transitions, 4277 flow. Second operand has 62 states, 62 states have (on average 118.1774193548387) internal successors, (7327), 62 states have internal predecessors, (7327), 0 states have call successors, (0), 0 states 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 12:08:16,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:08:16,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 245 [2022-11-16 12:08:16,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:08:48,267 INFO L130 PetriNetUnfolder]: 22594/50415 cut-off events. [2022-11-16 12:08:48,268 INFO L131 PetriNetUnfolder]: For 225970/230223 co-relation queries the response was YES. [2022-11-16 12:08:48,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176770 conditions, 50415 events. 22594/50415 cut-off events. For 225970/230223 co-relation queries the response was YES. Maximal size of possible extension queue 1939. Compared 562804 event pairs, 3874 based on Foata normal form. 1172/48243 useless extension candidates. Maximal degree in co-relation 176714. Up to 18777 conditions per place. [2022-11-16 12:08:49,128 INFO L137 encePairwiseOnDemand]: 194/245 looper letters, 995 selfloop transitions, 555 changer transitions 277/1931 dead transitions. [2022-11-16 12:08:49,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1931 transitions, 18972 flow [2022-11-16 12:08:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-11-16 12:08:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2022-11-16 12:08:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 12667 transitions. [2022-11-16 12:08:49,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48775510204081635 [2022-11-16 12:08:49,149 INFO L72 ComplementDD]: Start complementDD. Operand 106 states and 12667 transitions. [2022-11-16 12:08:49,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 12667 transitions. [2022-11-16 12:08:49,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:08:49,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 106 states and 12667 transitions. [2022-11-16 12:08:49,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 107 states, 106 states have (on average 119.5) internal successors, (12667), 106 states have internal predecessors, (12667), 0 states have call successors, (0), 0 states 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 12:08:49,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 107 states, 107 states have (on average 245.0) internal successors, (26215), 107 states have internal predecessors, (26215), 0 states have call successors, (0), 0 states 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 12:08:49,210 INFO L81 ComplementDD]: Finished complementDD. Result has 107 states, 107 states have (on average 245.0) internal successors, (26215), 107 states have internal predecessors, (26215), 0 states have call successors, (0), 0 states 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 12:08:49,210 INFO L175 Difference]: Start difference. First operand has 375 places, 598 transitions, 4277 flow. Second operand 106 states and 12667 transitions. [2022-11-16 12:08:49,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1931 transitions, 18972 flow [2022-11-16 12:08:52,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1931 transitions, 18953 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:08:52,503 INFO L231 Difference]: Finished difference. Result has 517 places, 1032 transitions, 10356 flow [2022-11-16 12:08:52,504 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=106, PETRI_FLOW=10356, PETRI_PLACES=517, PETRI_TRANSITIONS=1032} [2022-11-16 12:08:52,505 INFO L288 CegarLoopForPetriNet]: 222 programPoint places, 295 predicate places. [2022-11-16 12:08:52,505 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 1032 transitions, 10356 flow [2022-11-16 12:08:52,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 118.1774193548387) internal successors, (7327), 62 states have internal predecessors, (7327), 0 states have call successors, (0), 0 states 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 12:08:52,507 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:08:52,507 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:08:52,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:52,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:52,714 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-16 12:08:52,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:52,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1343127311, now seen corresponding path program 5 times [2022-11-16 12:08:52,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:52,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538563714] [2022-11-16 12:08:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:52,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:57,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:57,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538563714] [2022-11-16 12:08:57,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538563714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:57,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290021832] [2022-11-16 12:08:57,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:08:57,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:57,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:57,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:57,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3f1319f-e584-4cdc-b84f-f8fe508884c4/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:08:57,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:08:57,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:57,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 12:08:57,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:57,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12:08:58,152 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:08:58,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 12:09:00,095 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 12:09:00,633 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 25 treesize of output 7 [2022-11-16 12:09:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:09:00,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:01,953 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-16 12:09:01,953 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 46 treesize of output 34 [2022-11-16 12:09:01,969 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 11 treesize of output 5 [2022-11-16 12:09:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:09:03,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290021832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:03,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:03,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 23] total 60 [2022-11-16 12:09:03,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985400298] [2022-11-16 12:09:03,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:03,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 12:09:03,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:03,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 12:09:03,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3282, Unknown=2, NotChecked=0, Total=3540 [2022-11-16 12:09:03,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 245 [2022-11-16 12:09:03,621 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 1032 transitions, 10356 flow. Second operand has 60 states, 60 states have (on average 101.41666666666667) internal successors, (6085), 60 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states 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 12:09:03,621 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:09:03,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 245 [2022-11-16 12:09:03,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand