./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro --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 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df --- 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-8393723 [2022-11-18 20:10:11,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:10:11,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:10:11,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:10:11,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:10:11,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:10:11,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:10:11,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:10:11,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:10:11,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:10:11,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:10:11,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:10:11,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:10:11,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:10:11,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:10:11,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:10:11,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:10:11,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:10:11,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:10:11,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:10:11,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:10:11,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:10:11,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:10:11,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:10:11,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:10:11,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:10:11,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:10:11,744 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:10:11,745 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:10:11,746 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:10:11,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:10:11,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:10:11,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:10:11,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:10:11,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:10:11,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:10:11,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:10:11,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:10:11,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:10:11,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:10:11,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:10:11,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:10:11,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:10:11,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:10:11,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:10:11,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:10:11,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:10:11,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:10:11,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:10:11,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:10:11,801 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:10:11,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:10:11,802 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:10:11,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:10:11,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:10:11,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:10:11,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:10:11,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:10:11,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:10:11,804 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:10:11,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:10:11,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:10:11,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:10:11,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:10:11,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:10:11,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:10:11,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:10:11,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:10:11,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:10:11,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:10:11,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:10:11,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:10:11,808 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:10:11,808 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:10:11,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:10:11,809 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_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89f85a9c071b9d85a8a89a1542b8738a051beeaf8ef3f8b389c5a92dd50b70df [2022-11-18 20:10:12,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:10:12,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:10:12,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:10:12,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:10:12,174 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:10:12,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-18 20:10:12,258 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/data/ab8d196e3/723979ffd18a453aa0fb030761fda903/FLAG829b03fb8 [2022-11-18 20:10:12,788 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:10:12,789 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2022-11-18 20:10:12,797 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/data/ab8d196e3/723979ffd18a453aa0fb030761fda903/FLAG829b03fb8 [2022-11-18 20:10:13,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/data/ab8d196e3/723979ffd18a453aa0fb030761fda903 [2022-11-18 20:10:13,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:10:13,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:10:13,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:10:13,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:10:13,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:10:13,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@515e326e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13, skipping insertion in model container [2022-11-18 20:10:13,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:10:13,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:10:13,492 WARN L234 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_a76f030b-d881-47f5-a4d2-ee502111d582/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-18 20:10:13,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:10:13,515 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:10:13,535 WARN L234 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_a76f030b-d881-47f5-a4d2-ee502111d582/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2696,2709] [2022-11-18 20:10:13,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:10:13,552 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:10:13,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13 WrapperNode [2022-11-18 20:10:13,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:10:13,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:10:13,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:10:13,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:10:13,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,569 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,595 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 154 [2022-11-18 20:10:13,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:10:13,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:10:13,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:10:13,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:10:13,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,640 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,644 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:10:13,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:10:13,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:10:13,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:10:13,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (1/1) ... [2022-11-18 20:10:13,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:10:13,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:13,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:10:13,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:10:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:10:13,720 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:10:13,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:10:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:10:13,721 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:10:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:10:13,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:10:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:10:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:10:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:10:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:10:13,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:10:13,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:10:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:10:13,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:10:13,724 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:10:13,841 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:10:13,844 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:10:14,332 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:10:14,572 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:10:14,584 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:10:14,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:10:14 BoogieIcfgContainer [2022-11-18 20:10:14,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:10:14,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:10:14,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:10:14,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:10:14,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:10:13" (1/3) ... [2022-11-18 20:10:14,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1389e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:10:14, skipping insertion in model container [2022-11-18 20:10:14,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:10:13" (2/3) ... [2022-11-18 20:10:14,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1389e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:10:14, skipping insertion in model container [2022-11-18 20:10:14,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:10:14" (3/3) ... [2022-11-18 20:10:14,639 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2022-11-18 20:10:14,651 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:10:14,668 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:10:14,668 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:10:14,668 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:10:14,739 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:10:14,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 136 transitions, 288 flow [2022-11-18 20:10:14,885 INFO L130 PetriNetUnfolder]: 11/134 cut-off events. [2022-11-18 20:10:14,885 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:10:14,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 134 events. 11/134 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 68 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2022-11-18 20:10:14,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 136 transitions, 288 flow [2022-11-18 20:10:14,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2022-11-18 20:10:14,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:10:14,917 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;@445d4919, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:10:14,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 20:10:14,962 INFO L130 PetriNetUnfolder]: 11/124 cut-off events. [2022-11-18 20:10:14,962 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:10:14,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:14,963 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] [2022-11-18 20:10:14,964 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:14,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:14,971 INFO L85 PathProgramCache]: Analyzing trace with hash 891903697, now seen corresponding path program 1 times [2022-11-18 20:10:14,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:14,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294020322] [2022-11-18 20:10:14,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:14,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:15,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:15,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294020322] [2022-11-18 20:10:15,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294020322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:15,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:15,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:10:15,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661430675] [2022-11-18 20:10:15,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:15,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:10:15,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:15,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:10:15,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:10:15,434 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 136 [2022-11-18 20:10:15,438 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 262 flow. Second operand has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:15,438 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:10:15,438 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 136 [2022-11-18 20:10:15,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:10:15,609 INFO L130 PetriNetUnfolder]: 12/147 cut-off events. [2022-11-18 20:10:15,609 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2022-11-18 20:10:15,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 147 events. 12/147 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 166 event pairs, 5 based on Foata normal form. 14/150 useless extension candidates. Maximal degree in co-relation 97. Up to 22 conditions per place. [2022-11-18 20:10:15,612 INFO L137 encePairwiseOnDemand]: 128/136 looper letters, 7 selfloop transitions, 0 changer transitions 4/117 dead transitions. [2022-11-18 20:10:15,612 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 117 transitions, 260 flow [2022-11-18 20:10:15,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:10:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:10:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 255 transitions. [2022-11-18 20:10:15,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9375 [2022-11-18 20:10:15,636 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 255 transitions. [2022-11-18 20:10:15,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 255 transitions. [2022-11-18 20:10:15,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:10:15,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 255 transitions. [2022-11-18 20:10:15,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 127.5) internal successors, (255), 2 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:15,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:15,660 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:15,662 INFO L175 Difference]: Start difference. First operand has 121 places, 125 transitions, 262 flow. Second operand 2 states and 255 transitions. [2022-11-18 20:10:15,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 117 transitions, 260 flow [2022-11-18 20:10:15,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 117 transitions, 252 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:10:15,680 INFO L231 Difference]: Finished difference. Result has 118 places, 113 transitions, 230 flow [2022-11-18 20:10:15,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=230, PETRI_PLACES=118, PETRI_TRANSITIONS=113} [2022-11-18 20:10:15,688 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, -3 predicate places. [2022-11-18 20:10:15,688 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 113 transitions, 230 flow [2022-11-18 20:10:15,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 124.0) internal successors, (248), 2 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:15,690 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:15,691 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] [2022-11-18 20:10:15,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:10:15,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:15,693 INFO L85 PathProgramCache]: Analyzing trace with hash -469457169, now seen corresponding path program 1 times [2022-11-18 20:10:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:15,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399938313] [2022-11-18 20:10:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:15,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:16,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399938313] [2022-11-18 20:10:16,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399938313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:16,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:16,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:10:16,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166678154] [2022-11-18 20:10:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:16,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:10:16,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:16,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:10:16,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:10:16,155 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 136 [2022-11-18 20:10:16,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 113 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,157 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:10:16,157 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 136 [2022-11-18 20:10:16,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:10:16,334 INFO L130 PetriNetUnfolder]: 12/179 cut-off events. [2022-11-18 20:10:16,334 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:10:16,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 179 events. 12/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 245 event pairs, 5 based on Foata normal form. 5/175 useless extension candidates. Maximal degree in co-relation 227. Up to 31 conditions per place. [2022-11-18 20:10:16,336 INFO L137 encePairwiseOnDemand]: 126/136 looper letters, 19 selfloop transitions, 6 changer transitions 3/120 dead transitions. [2022-11-18 20:10:16,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 120 transitions, 302 flow [2022-11-18 20:10:16,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:10:16,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:10:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 773 transitions. [2022-11-18 20:10:16,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8119747899159664 [2022-11-18 20:10:16,341 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 773 transitions. [2022-11-18 20:10:16,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 773 transitions. [2022-11-18 20:10:16,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:10:16,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 773 transitions. [2022-11-18 20:10:16,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.42857142857143) internal successors, (773), 7 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,351 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,351 INFO L175 Difference]: Start difference. First operand has 118 places, 113 transitions, 230 flow. Second operand 7 states and 773 transitions. [2022-11-18 20:10:16,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 120 transitions, 302 flow [2022-11-18 20:10:16,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 120 transitions, 302 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:10:16,355 INFO L231 Difference]: Finished difference. Result has 122 places, 114 transitions, 256 flow [2022-11-18 20:10:16,356 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=256, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2022-11-18 20:10:16,357 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 1 predicate places. [2022-11-18 20:10:16,357 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 256 flow [2022-11-18 20:10:16,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 108.66666666666667) internal successors, (652), 6 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:16,358 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:16,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:10:16,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:16,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:16,359 INFO L85 PathProgramCache]: Analyzing trace with hash 853527032, now seen corresponding path program 1 times [2022-11-18 20:10:16,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:16,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025633682] [2022-11-18 20:10:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:16,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:10:16,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:16,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025633682] [2022-11-18 20:10:16,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025633682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:16,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:16,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:10:16,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615962883] [2022-11-18 20:10:16,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:16,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:10:16,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:16,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:10:16,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:10:16,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-11-18 20:10:16,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:10:16,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-11-18 20:10:16,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:10:16,699 INFO L130 PetriNetUnfolder]: 13/156 cut-off events. [2022-11-18 20:10:16,700 INFO L131 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2022-11-18 20:10:16,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 156 events. 13/156 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 165 event pairs, 1 based on Foata normal form. 1/151 useless extension candidates. Maximal degree in co-relation 208. Up to 23 conditions per place. [2022-11-18 20:10:16,702 INFO L137 encePairwiseOnDemand]: 132/136 looper letters, 11 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2022-11-18 20:10:16,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 117 transitions, 295 flow [2022-11-18 20:10:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:10:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 20:10:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2022-11-18 20:10:16,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8897058823529411 [2022-11-18 20:10:16,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2022-11-18 20:10:16,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2022-11-18 20:10:16,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:10:16,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2022-11-18 20:10:16,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,709 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,709 INFO L175 Difference]: Start difference. First operand has 122 places, 114 transitions, 256 flow. Second operand 3 states and 363 transitions. [2022-11-18 20:10:16,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 117 transitions, 295 flow [2022-11-18 20:10:16,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 117 transitions, 285 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:10:16,714 INFO L231 Difference]: Finished difference. Result has 120 places, 116 transitions, 269 flow [2022-11-18 20:10:16,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=120, PETRI_TRANSITIONS=116} [2022-11-18 20:10:16,715 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, -1 predicate places. [2022-11-18 20:10:16,715 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 116 transitions, 269 flow [2022-11-18 20:10:16,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,716 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:16,716 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:16,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:10:16,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1991812262, now seen corresponding path program 2 times [2022-11-18 20:10:16,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:16,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988675248] [2022-11-18 20:10:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:16,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:10:17,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:17,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988675248] [2022-11-18 20:10:17,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988675248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:17,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:17,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 20:10:17,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75989077] [2022-11-18 20:10:17,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:17,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:10:17,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:17,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:10:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:10:17,443 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 136 [2022-11-18 20:10:17,446 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 116 transitions, 269 flow. Second operand has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:17,446 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:10:17,446 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 136 [2022-11-18 20:10:17,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:10:17,820 INFO L130 PetriNetUnfolder]: 82/335 cut-off events. [2022-11-18 20:10:17,820 INFO L131 PetriNetUnfolder]: For 109/117 co-relation queries the response was YES. [2022-11-18 20:10:17,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 335 events. 82/335 cut-off events. For 109/117 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1239 event pairs, 20 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 637. Up to 73 conditions per place. [2022-11-18 20:10:17,827 INFO L137 encePairwiseOnDemand]: 121/136 looper letters, 49 selfloop transitions, 13 changer transitions 6/147 dead transitions. [2022-11-18 20:10:17,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 147 transitions, 498 flow [2022-11-18 20:10:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:10:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-18 20:10:17,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1213 transitions. [2022-11-18 20:10:17,832 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6860859728506787 [2022-11-18 20:10:17,833 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1213 transitions. [2022-11-18 20:10:17,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1213 transitions. [2022-11-18 20:10:17,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:10:17,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1213 transitions. [2022-11-18 20:10:17,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 93.3076923076923) internal successors, (1213), 13 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:17,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:17,851 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:17,852 INFO L175 Difference]: Start difference. First operand has 120 places, 116 transitions, 269 flow. Second operand 13 states and 1213 transitions. [2022-11-18 20:10:17,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 147 transitions, 498 flow [2022-11-18 20:10:17,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 147 transitions, 473 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-11-18 20:10:17,866 INFO L231 Difference]: Finished difference. Result has 135 places, 122 transitions, 318 flow [2022-11-18 20:10:17,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=318, PETRI_PLACES=135, PETRI_TRANSITIONS=122} [2022-11-18 20:10:17,868 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 14 predicate places. [2022-11-18 20:10:17,874 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 122 transitions, 318 flow [2022-11-18 20:10:17,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.5) internal successors, (1086), 12 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:17,875 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:17,876 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] [2022-11-18 20:10:17,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:10:17,877 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:17,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash 670984934, now seen corresponding path program 1 times [2022-11-18 20:10:17,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:17,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996608751] [2022-11-18 20:10:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:17,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:17,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:10:18,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:18,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996608751] [2022-11-18 20:10:18,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996608751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:10:18,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:10:18,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:10:18,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507449111] [2022-11-18 20:10:18,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:10:18,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:10:18,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:18,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:10:18,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:10:18,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 136 [2022-11-18 20:10:18,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 122 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:18,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:10:18,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 136 [2022-11-18 20:10:18,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:10:18,297 INFO L130 PetriNetUnfolder]: 26/272 cut-off events. [2022-11-18 20:10:18,297 INFO L131 PetriNetUnfolder]: For 81/96 co-relation queries the response was YES. [2022-11-18 20:10:18,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 272 events. 26/272 cut-off events. For 81/96 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 830 event pairs, 2 based on Foata normal form. 6/274 useless extension candidates. Maximal degree in co-relation 442. Up to 37 conditions per place. [2022-11-18 20:10:18,301 INFO L137 encePairwiseOnDemand]: 132/136 looper letters, 16 selfloop transitions, 7 changer transitions 3/132 dead transitions. [2022-11-18 20:10:18,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 399 flow [2022-11-18 20:10:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:10:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 20:10:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2022-11-18 20:10:18,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8952205882352942 [2022-11-18 20:10:18,305 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2022-11-18 20:10:18,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2022-11-18 20:10:18,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:10:18,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2022-11-18 20:10:18,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:18,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:18,312 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:18,312 INFO L175 Difference]: Start difference. First operand has 135 places, 122 transitions, 318 flow. Second operand 4 states and 487 transitions. [2022-11-18 20:10:18,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 399 flow [2022-11-18 20:10:18,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 132 transitions, 383 flow, removed 3 selfloop flow, removed 7 redundant places. [2022-11-18 20:10:18,322 INFO L231 Difference]: Finished difference. Result has 130 places, 123 transitions, 336 flow [2022-11-18 20:10:18,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=130, PETRI_TRANSITIONS=123} [2022-11-18 20:10:18,327 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 9 predicate places. [2022-11-18 20:10:18,328 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 123 transitions, 336 flow [2022-11-18 20:10:18,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:18,329 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:18,329 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] [2022-11-18 20:10:18,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:10:18,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:18,336 INFO L85 PathProgramCache]: Analyzing trace with hash -848582619, now seen corresponding path program 1 times [2022-11-18 20:10:18,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:18,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564008595] [2022-11-18 20:10:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:18,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:18,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:18,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564008595] [2022-11-18 20:10:18,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564008595] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:18,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232411943] [2022-11-18 20:10:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:18,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:18,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:18,693 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:18,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:10:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:10:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:19,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:19,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232411943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:19,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:19,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-18 20:10:19,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745694157] [2022-11-18 20:10:19,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:19,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:10:19,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:19,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:10:19,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:10:19,640 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 136 [2022-11-18 20:10:19,642 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 123 transitions, 336 flow. Second operand has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:19,643 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:10:19,643 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 136 [2022-11-18 20:10:19,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:10:20,055 INFO L130 PetriNetUnfolder]: 26/315 cut-off events. [2022-11-18 20:10:20,055 INFO L131 PetriNetUnfolder]: For 212/253 co-relation queries the response was YES. [2022-11-18 20:10:20,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 315 events. 26/315 cut-off events. For 212/253 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 926 event pairs, 6 based on Foata normal form. 7/318 useless extension candidates. Maximal degree in co-relation 568. Up to 54 conditions per place. [2022-11-18 20:10:20,058 INFO L137 encePairwiseOnDemand]: 124/136 looper letters, 28 selfloop transitions, 11 changer transitions 6/137 dead transitions. [2022-11-18 20:10:20,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 137 transitions, 475 flow [2022-11-18 20:10:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:10:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-18 20:10:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1277 transitions. [2022-11-18 20:10:20,063 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7824754901960784 [2022-11-18 20:10:20,063 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1277 transitions. [2022-11-18 20:10:20,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1277 transitions. [2022-11-18 20:10:20,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:10:20,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1277 transitions. [2022-11-18 20:10:20,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 106.41666666666667) internal successors, (1277), 12 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:20,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:20,072 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 136.0) internal successors, (1768), 13 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:20,072 INFO L175 Difference]: Start difference. First operand has 130 places, 123 transitions, 336 flow. Second operand 12 states and 1277 transitions. [2022-11-18 20:10:20,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 137 transitions, 475 flow [2022-11-18 20:10:20,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 137 transitions, 459 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-11-18 20:10:20,078 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 385 flow [2022-11-18 20:10:20,078 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=385, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2022-11-18 20:10:20,079 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 23 predicate places. [2022-11-18 20:10:20,079 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 385 flow [2022-11-18 20:10:20,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 105.52631578947368) internal successors, (2005), 19 states have internal predecessors, (2005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:20,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:20,081 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] [2022-11-18 20:10:20,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:20,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:20,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:20,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1901575578, now seen corresponding path program 2 times [2022-11-18 20:10:20,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:20,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145764760] [2022-11-18 20:10:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:20,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:21,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:21,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145764760] [2022-11-18 20:10:21,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145764760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:21,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568770584] [2022-11-18 20:10:21,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:10:21,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:21,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:21,908 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:21,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:10:22,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:10:22,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:22,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:10:22,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:23,529 INFO L321 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-11-18 20:10:23,530 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 24 treesize of output 10 [2022-11-18 20:10:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:23,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:23,853 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:10:23,854 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 25 treesize of output 16 [2022-11-18 20:10:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:25,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568770584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:25,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:25,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 41 [2022-11-18 20:10:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365327679] [2022-11-18 20:10:25,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:10:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:10:25,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1412, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:10:25,469 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 136 [2022-11-18 20:10:25,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 127 transitions, 385 flow. Second operand has 41 states, 41 states have (on average 84.97560975609755) internal successors, (3484), 41 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:25,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:10:25,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 136 [2022-11-18 20:10:25,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:10:30,620 INFO L130 PetriNetUnfolder]: 779/2422 cut-off events. [2022-11-18 20:10:30,620 INFO L131 PetriNetUnfolder]: For 2445/2533 co-relation queries the response was YES. [2022-11-18 20:10:30,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5708 conditions, 2422 events. 779/2422 cut-off events. For 2445/2533 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19064 event pairs, 32 based on Foata normal form. 36/2382 useless extension candidates. Maximal degree in co-relation 5691. Up to 411 conditions per place. [2022-11-18 20:10:30,643 INFO L137 encePairwiseOnDemand]: 110/136 looper letters, 186 selfloop transitions, 129 changer transitions 0/384 dead transitions. [2022-11-18 20:10:30,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 384 transitions, 2131 flow [2022-11-18 20:10:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 20:10:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-18 20:10:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4214 transitions. [2022-11-18 20:10:30,655 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6455269607843137 [2022-11-18 20:10:30,656 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4214 transitions. [2022-11-18 20:10:30,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4214 transitions. [2022-11-18 20:10:30,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:10:30,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4214 transitions. [2022-11-18 20:10:30,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 87.79166666666667) internal successors, (4214), 48 states have internal predecessors, (4214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:30,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 136.0) internal successors, (6664), 49 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:30,690 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 136.0) internal successors, (6664), 49 states have internal predecessors, (6664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:30,690 INFO L175 Difference]: Start difference. First operand has 144 places, 127 transitions, 385 flow. Second operand 48 states and 4214 transitions. [2022-11-18 20:10:30,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 384 transitions, 2131 flow [2022-11-18 20:10:30,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 384 transitions, 2048 flow, removed 37 selfloop flow, removed 6 redundant places. [2022-11-18 20:10:30,708 INFO L231 Difference]: Finished difference. Result has 212 places, 254 transitions, 1595 flow [2022-11-18 20:10:30,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=1595, PETRI_PLACES=212, PETRI_TRANSITIONS=254} [2022-11-18 20:10:30,709 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 91 predicate places. [2022-11-18 20:10:30,710 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 254 transitions, 1595 flow [2022-11-18 20:10:30,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 84.97560975609755) internal successors, (3484), 41 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:30,712 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:30,712 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] [2022-11-18 20:10:30,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:10:30,919 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:30,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash 202496092, now seen corresponding path program 3 times [2022-11-18 20:10:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:30,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793354353] [2022-11-18 20:10:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:32,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:32,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793354353] [2022-11-18 20:10:32,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793354353] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:32,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337188428] [2022-11-18 20:10:32,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:10:32,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:32,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:32,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:32,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:10:32,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:10:32,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:32,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:10:32,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:33,164 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:10:33,165 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 23 treesize of output 10 [2022-11-18 20:10:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:33,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:33,287 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-18 20:10:33,288 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 25 treesize of output 16 [2022-11-18 20:10:33,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:33,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337188428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:33,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:33,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 26 [2022-11-18 20:10:33,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579480025] [2022-11-18 20:10:33,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:33,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:10:33,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:33,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:10:33,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:10:33,583 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 136 [2022-11-18 20:10:33,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 254 transitions, 1595 flow. Second operand has 26 states, 26 states have (on average 68.23076923076923) internal successors, (1774), 26 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:33,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:10:33,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 136 [2022-11-18 20:10:33,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:10:36,142 INFO L130 PetriNetUnfolder]: 989/2821 cut-off events. [2022-11-18 20:10:36,142 INFO L131 PetriNetUnfolder]: For 15918/16222 co-relation queries the response was YES. [2022-11-18 20:10:36,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10239 conditions, 2821 events. 989/2821 cut-off events. For 15918/16222 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22802 event pairs, 145 based on Foata normal form. 75/2778 useless extension candidates. Maximal degree in co-relation 10196. Up to 1184 conditions per place. [2022-11-18 20:10:36,246 INFO L137 encePairwiseOnDemand]: 107/136 looper letters, 217 selfloop transitions, 117 changer transitions 0/389 dead transitions. [2022-11-18 20:10:36,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 389 transitions, 3282 flow [2022-11-18 20:10:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:10:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-18 20:10:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2203 transitions. [2022-11-18 20:10:36,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5062040441176471 [2022-11-18 20:10:36,257 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2203 transitions. [2022-11-18 20:10:36,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2203 transitions. [2022-11-18 20:10:36,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:10:36,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2203 transitions. [2022-11-18 20:10:36,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 68.84375) internal successors, (2203), 32 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:36,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 136.0) internal successors, (4488), 33 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:36,283 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 136.0) internal successors, (4488), 33 states have internal predecessors, (4488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:36,284 INFO L175 Difference]: Start difference. First operand has 212 places, 254 transitions, 1595 flow. Second operand 32 states and 2203 transitions. [2022-11-18 20:10:36,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 389 transitions, 3282 flow [2022-11-18 20:10:36,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 389 transitions, 2963 flow, removed 148 selfloop flow, removed 11 redundant places. [2022-11-18 20:10:36,416 INFO L231 Difference]: Finished difference. Result has 239 places, 314 transitions, 2383 flow [2022-11-18 20:10:36,417 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2383, PETRI_PLACES=239, PETRI_TRANSITIONS=314} [2022-11-18 20:10:36,420 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 118 predicate places. [2022-11-18 20:10:36,420 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 314 transitions, 2383 flow [2022-11-18 20:10:36,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 68.23076923076923) internal successors, (1774), 26 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:36,421 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:36,422 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] [2022-11-18 20:10:36,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:36,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:36,628 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:36,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1835410918, now seen corresponding path program 4 times [2022-11-18 20:10:36,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:36,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659630896] [2022-11-18 20:10:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:36,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:38,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659630896] [2022-11-18 20:10:38,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659630896] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:38,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246865947] [2022-11-18 20:10:38,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:10:38,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:38,999 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:39,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:10:39,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:10:39,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:10:39,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:40,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:10:40,682 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 [2022-11-18 20:10:40,932 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 [2022-11-18 20:10:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:40,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:41,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:10:41,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2022-11-18 20:10:41,416 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 24 treesize of output 18 [2022-11-18 20:10:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:10:43,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246865947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:43,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:43,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 64 [2022-11-18 20:10:43,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125026150] [2022-11-18 20:10:43,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:43,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-18 20:10:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:43,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-18 20:10:43,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=3732, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 20:10:43,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 136 [2022-11-18 20:10:43,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 314 transitions, 2383 flow. Second operand has 64 states, 64 states have (on average 50.125) internal successors, (3208), 64 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:43,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:10:43,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 136 [2022-11-18 20:10:43,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:10:56,503 INFO L130 PetriNetUnfolder]: 5711/11880 cut-off events. [2022-11-18 20:10:56,503 INFO L131 PetriNetUnfolder]: For 103803/103894 co-relation queries the response was YES. [2022-11-18 20:10:56,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52353 conditions, 11880 events. 5711/11880 cut-off events. For 103803/103894 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 108439 event pairs, 183 based on Foata normal form. 262/12099 useless extension candidates. Maximal degree in co-relation 52303. Up to 1970 conditions per place. [2022-11-18 20:10:56,726 INFO L137 encePairwiseOnDemand]: 105/136 looper letters, 580 selfloop transitions, 536 changer transitions 0/1156 dead transitions. [2022-11-18 20:10:56,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1156 transitions, 12007 flow [2022-11-18 20:10:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-18 20:10:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-18 20:10:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3532 transitions. [2022-11-18 20:10:56,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3995475113122172 [2022-11-18 20:10:56,743 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3532 transitions. [2022-11-18 20:10:56,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3532 transitions. [2022-11-18 20:10:56,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:10:56,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3532 transitions. [2022-11-18 20:10:56,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 54.33846153846154) internal successors, (3532), 65 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:56,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 136.0) internal successors, (8976), 66 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:56,798 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 136.0) internal successors, (8976), 66 states have internal predecessors, (8976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:56,799 INFO L175 Difference]: Start difference. First operand has 239 places, 314 transitions, 2383 flow. Second operand 65 states and 3532 transitions. [2022-11-18 20:10:56,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1156 transitions, 12007 flow [2022-11-18 20:10:57,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 1156 transitions, 11692 flow, removed 134 selfloop flow, removed 21 redundant places. [2022-11-18 20:10:57,650 INFO L231 Difference]: Finished difference. Result has 301 places, 772 transitions, 9371 flow [2022-11-18 20:10:57,651 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=9371, PETRI_PLACES=301, PETRI_TRANSITIONS=772} [2022-11-18 20:10:57,652 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 180 predicate places. [2022-11-18 20:10:57,652 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 772 transitions, 9371 flow [2022-11-18 20:10:57,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 50.125) internal successors, (3208), 64 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:57,654 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:10:57,654 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:57,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:57,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:57,861 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:10:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:57,861 INFO L85 PathProgramCache]: Analyzing trace with hash 793717702, now seen corresponding path program 1 times [2022-11-18 20:10:57,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:57,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061993728] [2022-11-18 20:10:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:57,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:00,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:00,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061993728] [2022-11-18 20:11:00,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061993728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:00,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661493600] [2022-11-18 20:11:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:00,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:00,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:00,374 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:00,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:11:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:00,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-18 20:11:00,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:00,602 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 [2022-11-18 20:11:01,160 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:11:01,161 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 [2022-11-18 20:11:01,468 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 [2022-11-18 20:11:01,755 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 [2022-11-18 20:11:02,478 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 [2022-11-18 20:11:02,801 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 [2022-11-18 20:11:03,613 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 [2022-11-18 20:11:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:03,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:08,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:08,099 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 2 case distinctions, treesize of input 78 treesize of output 63 [2022-11-18 20:11:08,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:08,119 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 316 treesize of output 296 [2022-11-18 20:11:08,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:08,139 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 284 treesize of output 248 [2022-11-18 20:11:08,157 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:08,158 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 236 treesize of output 224 [2022-11-18 20:11:08,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:08,542 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 2 case distinctions, treesize of input 78 treesize of output 63 [2022-11-18 20:11:08,556 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-18 20:11:08,557 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 148 treesize of output 136 [2022-11-18 20:11:08,572 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-18 20:11:08,572 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 132 treesize of output 112 [2022-11-18 20:11:08,589 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-18 20:11:08,591 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 83 treesize of output 75 [2022-11-18 20:11:10,185 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 [2022-11-18 20:11:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:10,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661493600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:10,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:10,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 33] total 86 [2022-11-18 20:11:10,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172265523] [2022-11-18 20:11:10,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:10,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-18 20:11:10,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:10,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-18 20:11:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=6348, Unknown=51, NotChecked=0, Total=7310 [2022-11-18 20:11:10,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 136 [2022-11-18 20:11:10,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 772 transitions, 9371 flow. Second operand has 86 states, 86 states have (on average 47.406976744186046) internal successors, (4077), 86 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:10,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:11:10,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 136 [2022-11-18 20:11:10,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:11:15,310 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse17 (* c_~q_front~0 4)) (.cse18 (* 4 c_~q_back~0))) (let ((.cse1 (+ .cse18 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse17 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse8 (and (forall ((v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse21 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (< (+ c_~s~0 (select .cse21 .cse2)) 2) (not (= (select .cse21 .cse1) 1))))) (forall ((v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse22 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse22 .cse1) 1)) (< 0 (+ c_~s~0 (select .cse22 .cse2)))))))) (.cse10 (+ c_~q~0.offset .cse18)) (.cse11 (+ .cse17 c_~q~0.offset)) (.cse6 (< c_~n~0 (+ 2 c_~q_back~0))) (.cse7 (< c_~q_back~0 0))) (and (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_#t~malloc18#1.base_18| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_#t~malloc18#1.base_18|) 0)) (not (< |v_ULTIMATE.start_create_fresh_int_array_#t~malloc18#1.base_18| |c_#StackHeapBarrier|)))) (and (< c_~s~0 1) (< 0 (+ c_~s~0 1)))) (or (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse4 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_197 Int) (v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_197)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse0 .cse1) 1)) (< (+ c_~s~0 (select .cse0 .cse2)) 2)))) (forall ((v_ArrVal_197 Int) (v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse5 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse3 .cse4 v_ArrVal_197)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse5 .cse1) 1)) (< 0 (+ c_~s~0 (select .cse5 .cse2)))))))) .cse6 .cse7 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (or .cse6 .cse7 .cse8) (or .cse6 .cse7 (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) c_~N~0) (and (forall ((v_ArrVal_200 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~q~0.base))) (or (not (= (select .cse9 .cse10) 1)) (<= (+ c_~s~0 (select .cse9 .cse11)) c_~N~0)))) (forall ((v_ArrVal_200 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~q~0.base))) (or (not (= (select .cse12 .cse10) 1)) (<= c_~N~0 (+ c_~s~0 (select .cse12 .cse11)))))))) (or .cse6 .cse7 (let ((.cse15 (+ .cse18 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) (.cse14 (+ .cse17 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))) (and (forall ((v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse13 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (or (< 0 (+ c_~s~0 (select .cse13 .cse14))) (not (= (select .cse13 .cse15) 1))))) (forall ((v_ArrVal_199 (Array Int Int)) (v_ArrVal_200 (Array Int Int))) (let ((.cse16 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_199) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (or (not (= (select .cse16 .cse15) 1)) (< (+ c_~s~0 (select .cse16 .cse14)) 2))))))) (or (< (+ |c_ULTIMATE.start_create_fresh_int_array_#t~post19#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse6 .cse7 .cse8) (or (and (forall ((v_ArrVal_200 (Array Int Int))) (let ((.cse19 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~q~0.base))) (or (not (= (select .cse19 .cse10) 1)) (< (+ c_~s~0 (select .cse19 .cse11)) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|))))) (forall ((v_ArrVal_200 (Array Int Int))) (let ((.cse20 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_200) c_~q~0.base))) (or (not (= (select .cse20 .cse10) 1)) (< |c_thread1Thread1of1ForFork1_~i~0#1| (+ c_~s~0 (select .cse20 .cse11))))))) .cse6 .cse7))))) is different from false [2022-11-18 20:11:29,757 INFO L130 PetriNetUnfolder]: 9992/19974 cut-off events. [2022-11-18 20:11:29,757 INFO L131 PetriNetUnfolder]: For 254348/254461 co-relation queries the response was YES. [2022-11-18 20:11:30,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106644 conditions, 19974 events. 9992/19974 cut-off events. For 254348/254461 co-relation queries the response was YES. Maximal size of possible extension queue 1099. Compared 190287 event pairs, 983 based on Foata normal form. 76/19979 useless extension candidates. Maximal degree in co-relation 106575. Up to 6618 conditions per place. [2022-11-18 20:11:30,178 INFO L137 encePairwiseOnDemand]: 96/136 looper letters, 1098 selfloop transitions, 752 changer transitions 56/1945 dead transitions. [2022-11-18 20:11:30,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1945 transitions, 26466 flow [2022-11-18 20:11:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-18 20:11:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2022-11-18 20:11:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 5030 transitions. [2022-11-18 20:11:30,192 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.37358882947118244 [2022-11-18 20:11:30,192 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 5030 transitions. [2022-11-18 20:11:30,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 5030 transitions. [2022-11-18 20:11:30,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:11:30,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 5030 transitions. [2022-11-18 20:11:30,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 50.80808080808081) internal successors, (5030), 99 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:30,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 136.0) internal successors, (13600), 100 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:30,250 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 136.0) internal successors, (13600), 100 states have internal predecessors, (13600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:30,250 INFO L175 Difference]: Start difference. First operand has 301 places, 772 transitions, 9371 flow. Second operand 99 states and 5030 transitions. [2022-11-18 20:11:30,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1945 transitions, 26466 flow [2022-11-18 20:11:34,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1945 transitions, 23785 flow, removed 1313 selfloop flow, removed 24 redundant places. [2022-11-18 20:11:34,396 INFO L231 Difference]: Finished difference. Result has 414 places, 1284 transitions, 17261 flow [2022-11-18 20:11:34,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=8352, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=17261, PETRI_PLACES=414, PETRI_TRANSITIONS=1284} [2022-11-18 20:11:34,398 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 293 predicate places. [2022-11-18 20:11:34,398 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1284 transitions, 17261 flow [2022-11-18 20:11:34,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 47.406976744186046) internal successors, (4077), 86 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:34,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:11:34,400 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:34,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:34,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:11:34,609 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:11:34,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:34,609 INFO L85 PathProgramCache]: Analyzing trace with hash 950879276, now seen corresponding path program 2 times [2022-11-18 20:11:34,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:34,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38371435] [2022-11-18 20:11:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:34,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:36,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38371435] [2022-11-18 20:11:36,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38371435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:36,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787259686] [2022-11-18 20:11:36,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:11:36,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:36,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:36,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:36,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:11:36,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:11:36,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:36,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 20:11:36,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:39,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:11:39,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:39,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-11-18 20:11:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:39,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:40,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:40,365 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 51 treesize of output 31 [2022-11-18 20:11:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:11:42,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787259686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:42,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:42,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 25] total 74 [2022-11-18 20:11:42,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523151364] [2022-11-18 20:11:42,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:42,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-18 20:11:42,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:42,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-18 20:11:42,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=4766, Unknown=0, NotChecked=0, Total=5402 [2022-11-18 20:11:42,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-11-18 20:11:42,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1284 transitions, 17261 flow. Second operand has 74 states, 74 states have (on average 57.567567567567565) internal successors, (4260), 74 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:42,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:11:42,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-11-18 20:11:42,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:12:05,762 INFO L130 PetriNetUnfolder]: 12861/26201 cut-off events. [2022-11-18 20:12:05,762 INFO L131 PetriNetUnfolder]: For 417098/417401 co-relation queries the response was YES. [2022-11-18 20:12:06,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170857 conditions, 26201 events. 12861/26201 cut-off events. For 417098/417401 co-relation queries the response was YES. Maximal size of possible extension queue 1472. Compared 265199 event pairs, 1622 based on Foata normal form. 133/26265 useless extension candidates. Maximal degree in co-relation 170753. Up to 13798 conditions per place. [2022-11-18 20:12:06,457 INFO L137 encePairwiseOnDemand]: 96/136 looper letters, 723 selfloop transitions, 1811 changer transitions 76/2655 dead transitions. [2022-11-18 20:12:06,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 2655 transitions, 42696 flow [2022-11-18 20:12:06,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 20:12:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2022-11-18 20:12:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 5531 transitions. [2022-11-18 20:12:06,468 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4373023402909551 [2022-11-18 20:12:06,469 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 5531 transitions. [2022-11-18 20:12:06,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 5531 transitions. [2022-11-18 20:12:06,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:12:06,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 5531 transitions. [2022-11-18 20:12:06,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 59.473118279569896) internal successors, (5531), 93 states have internal predecessors, (5531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:06,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 136.0) internal successors, (12784), 94 states have internal predecessors, (12784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:06,506 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 136.0) internal successors, (12784), 94 states have internal predecessors, (12784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:06,506 INFO L175 Difference]: Start difference. First operand has 414 places, 1284 transitions, 17261 flow. Second operand 93 states and 5531 transitions. [2022-11-18 20:12:06,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 2655 transitions, 42696 flow [2022-11-18 20:12:13,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 2655 transitions, 41620 flow, removed 490 selfloop flow, removed 34 redundant places. [2022-11-18 20:12:13,747 INFO L231 Difference]: Finished difference. Result has 493 places, 2403 transitions, 41509 flow [2022-11-18 20:12:13,748 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=16672, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=859, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=41509, PETRI_PLACES=493, PETRI_TRANSITIONS=2403} [2022-11-18 20:12:13,749 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 372 predicate places. [2022-11-18 20:12:13,749 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 2403 transitions, 41509 flow [2022-11-18 20:12:13,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 57.567567567567565) internal successors, (4260), 74 states have internal predecessors, (4260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:13,750 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:12:13,750 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:13,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:12:13,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:12:13,962 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:12:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:13,962 INFO L85 PathProgramCache]: Analyzing trace with hash -541543194, now seen corresponding path program 3 times [2022-11-18 20:12:13,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:13,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929562844] [2022-11-18 20:12:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:13,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:12:15,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:15,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929562844] [2022-11-18 20:12:15,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929562844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:15,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490871774] [2022-11-18 20:12:15,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:12:15,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:15,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:15,944 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:15,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:12:16,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:12:16,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:12:16,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:12:16,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:16,801 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-18 20:12:16,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-18 20:12:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:12:17,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:17,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:12:17,556 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 51 treesize of output 31 [2022-11-18 20:12:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:12:18,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490871774] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:18,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:18,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 16, 16] total 50 [2022-11-18 20:12:18,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584708400] [2022-11-18 20:12:18,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:18,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:12:18,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:18,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:12:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2257, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 20:12:18,119 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-11-18 20:12:18,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 2403 transitions, 41509 flow. Second operand has 50 states, 50 states have (on average 57.98) internal successors, (2899), 50 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:18,122 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:12:18,122 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-11-18 20:12:18,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:12:45,552 INFO L130 PetriNetUnfolder]: 14130/28756 cut-off events. [2022-11-18 20:12:45,552 INFO L131 PetriNetUnfolder]: For 738918/739521 co-relation queries the response was YES. [2022-11-18 20:12:46,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236449 conditions, 28756 events. 14130/28756 cut-off events. For 738918/739521 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 294404 event pairs, 1648 based on Foata normal form. 96/28683 useless extension candidates. Maximal degree in co-relation 236324. Up to 13634 conditions per place. [2022-11-18 20:12:46,542 INFO L137 encePairwiseOnDemand]: 101/136 looper letters, 1514 selfloop transitions, 1711 changer transitions 67/3337 dead transitions. [2022-11-18 20:12:46,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 3337 transitions, 64728 flow [2022-11-18 20:12:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-18 20:12:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2022-11-18 20:12:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3494 transitions. [2022-11-18 20:12:46,554 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44295131845841784 [2022-11-18 20:12:46,554 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3494 transitions. [2022-11-18 20:12:46,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3494 transitions. [2022-11-18 20:12:46,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:12:46,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3494 transitions. [2022-11-18 20:12:46,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 60.241379310344826) internal successors, (3494), 58 states have internal predecessors, (3494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:46,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 136.0) internal successors, (8024), 59 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:46,605 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 136.0) internal successors, (8024), 59 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:46,606 INFO L175 Difference]: Start difference. First operand has 493 places, 2403 transitions, 41509 flow. Second operand 58 states and 3494 transitions. [2022-11-18 20:12:46,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 3337 transitions, 64728 flow [2022-11-18 20:13:02,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 3337 transitions, 63117 flow, removed 764 selfloop flow, removed 37 redundant places. [2022-11-18 20:13:02,419 INFO L231 Difference]: Finished difference. Result has 520 places, 3008 transitions, 57446 flow [2022-11-18 20:13:02,421 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=40306, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=57446, PETRI_PLACES=520, PETRI_TRANSITIONS=3008} [2022-11-18 20:13:02,422 INFO L288 CegarLoopForPetriNet]: 121 programPoint places, 399 predicate places. [2022-11-18 20:13:02,422 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 3008 transitions, 57446 flow [2022-11-18 20:13:02,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 57.98) internal successors, (2899), 50 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:02,423 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:13:02,423 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:02,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:02,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:02,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:13:02,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:02,630 INFO L85 PathProgramCache]: Analyzing trace with hash -30867164, now seen corresponding path program 4 times [2022-11-18 20:13:02,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:02,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484703397] [2022-11-18 20:13:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:02,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:05,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484703397] [2022-11-18 20:13:05,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484703397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200142927] [2022-11-18 20:13:05,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:13:05,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:05,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:05,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a76f030b-d881-47f5-a4d2-ee502111d582/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:13:05,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:13:05,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:13:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-18 20:13:05,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:06,462 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 [2022-11-18 20:13:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:06,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:07,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:13:07,408 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 40 treesize of output 28 [2022-11-18 20:13:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:13:09,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200142927] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:09,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:09,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24, 24] total 68 [2022-11-18 20:13:09,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209183324] [2022-11-18 20:13:09,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:09,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-18 20:13:09,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-18 20:13:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=4011, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 20:13:09,143 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 136 [2022-11-18 20:13:09,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 3008 transitions, 57446 flow. Second operand has 68 states, 68 states have (on average 57.80882352941177) internal successors, (3931), 68 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:09,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:13:09,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 136 [2022-11-18 20:13:09,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand